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Tailoring luminescence properties of NIR-BODIPY emitters through donor engineering and intramolecular conformational locking for high-performance solution-processed OLEDs 认领 引用
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作者 Yueyan Zhang Zhihai Yang +6 位作者 Xia Suo Ruicheng Wang Xuewei Nie Zafar Mahmood Yanping Huo Shi-Jian Su Shaomin Ji 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第12期273-279,共7页
The development of cost-effective,environmentally sustainable narrowband near-infrared(NIR)organic light-emitting diodes(OLEDs)remains challenging due to low intrinsic quantum yields of NIR emitters,as constrained by ... The development of cost-effective,environmentally sustainable narrowband near-infrared(NIR)organic light-emitting diodes(OLEDs)remains challenging due to low intrinsic quantum yields of NIR emitters,as constrained by the energy gap law and inefficient triplet exciton utilization.In this study,we present a conformation-locking strategy combined with donor engineering to enhance NIR emitters based on a boron-dipyrromethene(BODIPY)scaffold for high-performance solution-processed OLEDs.Two NIR emitters,Ph-BDP-Cz and Ph-BDP-PY,were synthesized by introducing a donor at the α-position of the BODIPY core via a vinyl bridge.This design increases molecular rigidity by promoting HF interactions between vinyl hydrogens and the BF2 group,suppressing twisting and scissoring motions,which results in narrow emission and high photoluminescence quantum yields.Donor engineering also enables fine-tuning of emission wavelengths without broadening the full-width at half-maximum(FWHM),maintaining a narrow emission profile.Using these BODIPY emitters in thermally activated delayed fluorescence(TADF)-sensitized hyperfluorescent OLEDs,we achieved a maximum external quantum efficiency(EQE)of 6.9%with an emission peak at 702 nm and a narrow FWHM of<45 nm.To our knowledge,this represents one of the highest efficiencies among TADF sensitized solution-processed NIR OLEDs,offering a promising path toward the development of sustainable and high-performance NIR optoelectronic devices. 展开更多
关键词 Near-infrared BODIPY Narrowband Solution-processed OLED
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PDINN sandwiched silver nanowires for solution-processed semitransparent organic photovoltaics with over 4%light utilization efficiency and nearly 100%bifaciality factor 认领 引用
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作者 Junjie Wu Menghua Cao +4 位作者 Xin Liu Rihong Zhu Jie Zhou Jiangsheng Yu Gang Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第5期1-9,共9页
Semitransparent organic photovoltaics(ST-OPVs)for building integration represent a pivotal direction in the development of photovoltaic industry.Solution-processed silver nanowires(AgNWs)are considered promising candi... Semitransparent organic photovoltaics(ST-OPVs)for building integration represent a pivotal direction in the development of photovoltaic industry.Solution-processed silver nanowires(AgNWs)are considered promising candidates for transparent electrodes in semitransparent devices due to their high transparency-conductivity-efficiency merit,large-scale processability,and low cost.In this work,we develop two solution-processed organic–inorganic hybrid electrodes,named AgNWs-PD and AgNWsPC,utilizing AgNWs as the conductive framework and aliphatic amine-functionalized perylene-diimide(PDINN)as the sandwiched material,while AgNWs-PC exhibits significantly improved electrical conductivity and enhanced contact area with the underlying electron transport layer.The optimized device achieves a power conversion efficiency of 9.45%with an open circuit voltage of 0.846 V,a high filling factor of 75.4%,and an average visible transmittance(AVT)of 44.0%,delivering an outstanding light utilization efficiency(LUE)of 4.16%,which is the highest reported value for all solution-processed ST-OPVs.In addition,by coupling a 30-nm tellurium dioxide atop AgNWs-PC,the bifaciality factor of derivative devices improves from 73.7%to 99.4%,while maintaining a high bifacial LUE over 3.7%.Our results emphasize the superiority and effectiveness of PDINN-sandwiched AgNWs electrodes for highperformance and all solution-processed ST-OPVs. 展开更多
关键词 Semitransparent organic photovoltaics Solution-processed Silver nanowire electrode Conventional structure Light utilization efficiency Bifaciality factor
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Efficient solution-processed near-infrared organic light-emitting diodes with a binary-mixed electron transport layer 认领 引用
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作者 Haowen Shang Yujie Yang +5 位作者 Bingjie Xue Yikai Wang Zhiyi Su Wenlong Liu Youzhi Wu Xinjun Xu 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第4期431-435,共5页
A binary-mixed electron transport layer(ETL)has been reported for constructing solution-processable near-infrared organic light-emitting diodes(NIR OLEDs).Relative to the single-component ETL,the binarymixed ETL compo... A binary-mixed electron transport layer(ETL)has been reported for constructing solution-processable near-infrared organic light-emitting diodes(NIR OLEDs).Relative to the single-component ETL,the binarymixed ETL composed of PDINN:TPBi can enhance the carrier transport capacity,reduce device impedance,and weaken fiuorescence quenching of the emitting layer.By carefully selecting an appropriate luminescent material Y5(a nonfullerene electron acceptor in organic solar cells)and precisely fine-tuning the molecular aggregation in active layer using a mixed solvent,the morphology is optimized and luminescence performance is enhanced,resulting in efficient NIR OLEDs with an emission peak at 890 nm.The experiment showcases a Y5-based near-infrared OLED with a maximum radiance of 34.9 W sr-1m-2and a maximum external quantum efficiency of 0.50%,which is among the highest values reported for nondoped fiuorescent NIR OLEDs with an emission peak over 850 nm. 展开更多
关键词 Near-infrared electroluminescence Organic light-emitting diodes Electron transport layer Nonfullerene acceptor Solution-processing
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Solution-processed multi-resonance organic light-emitting diodes with high efficiency and narrowband emission 认领 引用 被引量：6
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作者 Shen Xu Qingqing Yang +7 位作者 Ying Zhang Hui Li Qin Xue Guohua Xie Minzhao Gu Jibiao Jin Ling Huang Runfeng Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2021年第4期1372-1376,共5页
With excellent color purity(full-width half maximum(FWHM)<40 nm)and high quantum yield,multiresonance(MR)molecules can harvest both singlet and triplet excitons for highly efficient narrowband organic light-emittin... With excellent color purity(full-width half maximum(FWHM)<40 nm)and high quantum yield,multiresonance(MR)molecules can harvest both singlet and triplet excitons for highly efficient narrowband organic light-emitting diodes(OLEDs)owing to their thermally activated delayed fluorescence(TADF)nature.However,the highly rigid molecular skeleton with the oppositely positioned bo ron and nitrogen in generating MR effects results in the intrinsic difficulties in the solution-processing of MR-OLEDs.Here,we demonstrate a facile strategy to increase the solubility,enhance the efficiencies and modulate emission color of MR-TADF molecules by extending aromatic rings and introducing tert-butyls into the MR backbone.Two MR-TADF emitters with smaller singlet-triplet splitting energies(ΔE~(ST))and larger oscillator strengths were prepared conveniently,and the solution-processed MR-OLEDs were fabricated for the first time,exhibiting efficient bluish-green electroluminescence with narrow FWHM of 32 nm and external quantum efficiency of 16.3%,which are even comparable to the state-of-the-art performances of the vacuum-evaporated devices.These results prove the feasibility of designing efficient solutionprocessible MR molecules,offering important clues in developing high-performance solution-processed MR-OLEDs with high efficiency and color purity. 展开更多
关键词 Multi-resonance Thermally activated delayed fluorescence Solution-processed devices Charge-transfer delocalization Narrowband emission
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Construction of a cement-rebar nanoarchitecture for a solution-processed and flexible film of a Bi2Te3/CNT hybrid toward low thermal conductivity and high thermoelectric performance 认领 引用 被引量：3
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作者 Zhijun Chen Haicai Lv +2 位作者 Qichun Zhang Hanfu Wang Guangming Chen 《Carbon Energy》 SCIE CAS CSCD 2022年第1期115-128,共14页
Solution processability and flexibility still remain major challenges for many thermoelectric(TE)materials,including bismuth telluride(Bi2Te3),a typical and commercially available TE material.Here,we report a ne... Solution processability and flexibility still remain major challenges for many thermoelectric(TE)materials,including bismuth telluride(Bi2Te3),a typical and commercially available TE material.Here,we report a new solutionprocessed method to prepare a flexible film of a Bi2Te3/single-walled carbon nanotube(SWCNT)hybrid,where the dissolved Bi2Te3 ion precursors are mixed with dispersed SWCNTs in solution and recrystallized on the SWCNT surfaces to form a“cement-rebar”-like architecture.The hybrid film shows an n-type characteristic,with a stable Seebeck coefficient of−100.00±1.69μVK−1 in air.Furthermore,an extremely low in-plane thermal conductivity of∼0.33Wm−1 K−1 is achieved at 300 K,and the figure of merit(ZT)reaches 0.47±0.02.In addition,the TE performance is independent of mechanical bending.The unique“cement-rebar”-like architecture is believed to be responsible for the excellent TE performances and the high flexibility.The results provide a new avenue for the fabrication of solution-processable and flexible TE hybrid films and will speed up the applications of flexible electronics and energy conversion. 展开更多
关键词 Bi2Te3 carbon nanotube hybrid solution-processed thermoelectrics
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Inorganic and Organic Solution-Processed Thin Film Devices 认领 引用 被引量：10
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作者 Morteza Eslamian 《Nano-Micro Letters》 SCIE EI CAS 2017年第1期16-38,共23页
Thin films and thin film devices have a ubiquitous presence in numerous conventional and emerging technologies. This is because of the recent advances in nanotechnology, the development of functional and smart materia... Thin films and thin film devices have a ubiquitous presence in numerous conventional and emerging technologies. This is because of the recent advances in nanotechnology, the development of functional and smart materials,conducting polymers, molecular semiconductors, carbon nanotubes, and graphene, and the employment of unique properties of thin films and ultrathin films, such as high surface area, controlled nanostructure for effective charge transfer, and special physical and chemical properties, to develop new thin film devices. This paper is therefore intended to provide a concise critical review and research directions on most thin film devices, including thin film transistors, data storage memory, solar cells, organic light-emitting diodes, thermoelectric devices, smart materials, sensors, and actuators. The thin film devices may consist of organic, inorganic, and composite thin layers, and share similar functionality, properties, and fabrication routes. Therefore, due to the multidisciplinary nature of thin film devices, knowledge and advances already made in one area may be applicable to other similar areas. Owing to the importance of developing low-cost, scalable, and vacuum-free fabrication routes, this paper focuses on thin film devices that may be processed and deposited from solution. 展开更多
关键词 Organic electronics Photovoltaics Thin film transistors Thermoelectric devices Organic light-emitting diodes Smart materials Sensors and actuators Solution-processed methods
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Solution-Processed High Mobility Top-Gate N-Channel Polymer Field-Effect Transistors 认领 引用
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作者 项兰义 应俊 +2 位作者 韩金花 王伟 谢文法 《Chinese Physics Letters》 SCIE EI CAS CSCD 2015年第9期167-170,共4页
Polymer field-effect transistors operated in the n-channel model with a top-gate/bottom-contact are processed using a solution method. The transistor performance depends on the gate dielectric layer. A high performanc... Polymer field-effect transistors operated in the n-channel model with a top-gate/bottom-contact are processed using a solution method. The transistor performance depends on the gate dielectric layer. A high performance polymer transistor is achieved, with the saturated electron mobility of about 0.46cm2/Vs, threshold voltage nearly 0 V and subthreshold sway of about 0.9 V/decade, employing a polystyrene （PS） dielectric layer. The transistor performances are further improved with increasing current and lower operation voltages by utilizing a bi-layer gate dielectric, comprising a thin PS dielectric layer adjacent to the semiconductor to minimize the density of the interface traps for obtaining a small VT, a large μ and a poly（methyl methacrylate） （PMMA） dielectric layer with a relatively high-k adjacent to the gate electrode for enlarging the capacitance, processed from the orthogonal solvents. 展开更多
关键词 Solution-Processed High Mobility Top-Gate N-Channel Polymer Field-Effect Transistors PS
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GO-induced effective interconnection layer for all solution-processed tandem quantum dot light-emitting diodes 认领 引用 被引量：1
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作者 JIANG Hao-hong SU Hang +1 位作者 CHEN Li-xiang TAN Xing-wen 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第12期3737-3746,共10页
Compared to conventional quantum dot light-emitting diodes,tandem quantum dot light-emitting diodes(TQLEDs)possess higher device efficiency and more applications in the field of flat panel display and solid-state ligh... Compared to conventional quantum dot light-emitting diodes,tandem quantum dot light-emitting diodes(TQLEDs)possess higher device efficiency and more applications in the field of flat panel display and solid-state lighting in the future.The TQLED is a multilayer structure device which connects two or more light-emitting units by using an interconnection layer(ICL),which plays an extremely important role in the TQLED.Therefore,realizing an effective ICL is the key to obtain high-efficiency TQLEDs.In this work,the p-type materials polys(3,4-ethylenedioxythiophene),poly(styrenesulfonate)(PEDOT:PSS)and the n-type material zinc magnesium oxide(ZnMgO),were used,and an effective hybrid ICL,the PEDOT:PSS-GO/ZnMgO,was obtained by doping graphene oxide(GO)into PEDOT:PSS.The effect of GO additive on the ICL was systematically investigated.It exhibits that the GO additive brought the fine charge carrier generation and injection capacity simultaneously.Thus,the all solutionprocessed red TQLEDs were prepared and characterized for the first time.The maximum luminance of 40877 cd/m2 and the highest current efficiency of 19.6 cd/A were achieved,respectively,showing a 21%growth and a 51%increase when compared with those of the reference device without GO.The encouraging results suggest that our investigation paves the way for efficient all solution-processed TQLEDs. 展开更多
关键词 tandem quantum dot light-emitting diodes all solution-processed interconnection layer graphene oxide current efficiency
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Enhanced performance of solution-processed carbon nanotube transparent electrodes in foldable perovskite solar cells through vertical separation of binders by using eco-friendly parylene substrate 认领 引用
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作者 Unsoo Kim Jeong-Seok Nam +3 位作者 Jungjin Yoon Jiye Han Mansoo Choi Il Jeon 《Carbon Energy》 SCIE EI CAS CSCD 2024年第7期83-93,共11页
The successful utilization of an eco-friendly and biocompatible parylene-C substrate for high-performance solution-processed double-walled carbon nanotube(CNT)electrode-based perovskite solar cells(PSCs)was demonstrat... The successful utilization of an eco-friendly and biocompatible parylene-C substrate for high-performance solution-processed double-walled carbon nanotube(CNT)electrode-based perovskite solar cells(PSCs)was demonstrated.Through the use of a novel inversion transfer technique,vertical separation of the binders from the CNTs was induced,rendering a stronger p-doping effect and thereby a higher conductivity of the CNTs.The resulting foldable devices exhibited a power conversion efficiency of 18.11%,which is the highest reported among CNT transparent electrode-based PSCs to date,and withstood more than 10,000 folding cycles at a radius of 0.5 mm,demonstrating unprecedented mechanical stability.Furthermore,solar modules were fabricated using entirely laser scribing processes to assess the potential of the solution-processable nanocarbon electrode.Notably,this is the only one to be processed entirely by the laser scribing process and to be biocompatible as well as eco-friendly among the previously reported nonindium tin oxide-based perovskite solar modules. 展开更多
关键词 double-walled carbon nanotubes parylene substrates perovskite modules perovskite solar cells solution-processable electrodes surfactant removal
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Solution-processed CuOx as an efficient hole-extraction layer for inverted planar heterojunction perovskite solar cells 认领 引用 被引量：6
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作者 Zhi-Kai Yu Wei-Fei Fu +7 位作者 Wen-Qing Liu Zhong-Qiang Zhang Yu-Jing Liu Jie-Lin Yan Tao Ye Wei-Tao Yang Han-Ying Li Hong-Zheng Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2017年第1期13-18,共6页
A solution-processed CuOx film has been successfully integrated as the hole-transporting layer（HTL） for inverted planar heterojunction perovskite solar cells（PVSCs）. The CuOx layer is fabricated by simply spin-coa... A solution-processed CuOx film has been successfully integrated as the hole-transporting layer（HTL） for inverted planar heterojunction perovskite solar cells（PVSCs）. The CuOx layer is fabricated by simply spin-coating a copper acetylacetonate（Cu（acac）2） chloroform solution onto ITO glass with high transparency in the visible range. The compact and pinhole-free perovskite film with large grain domains is grown on the CuOx film. The inverted PVSCs with the structure of ITO/CuOx/MAPbI3/PC（61）BM/ZnO/Al are fabricated and show a best PCE of 17.43% under standard AM 1.5G simulated solar irradiation with a VOCof 1.03 V, aJ（SC） of 22.42 mA cm^（-2）, and a fill factor of 0.76, which is significantly higher and more stable than that fabricated from the often used hole-transporting material PEDOT：PSS（11.98%） under the same experimental conditions. The enhanced performance is attributed to the efficient hole extraction through the CuOx layer as well as the high-quality CH3NH3PbI3 films grown on the CuOx. Our results indicate that low-cost and solution-processed CuOx film is a promising HTL for high performance PVSCs with better stability. 展开更多
关键词 CuOx Solution-processing Hole-transporting layer Perovskite solar cells Stable
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Suppressing the Undesirable Energy Loss in Solution-Processed Hyperfluorescent OLEDs Employing BODIPY-Based Hybridized Local and Charge-Transfer Emitter 认领 引用
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作者 Xuewei Nie Zafar Mahmood +7 位作者 Denghui Liu Mengke Li Dehua Hu Wencheng Chen Longjiang Xing Shijian Su Yanping Huo Shaomin Ji 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第2期372-380,共9页
Hyperfluorescent organic light-emitting diodes(HF-OLEDs)approach has made it possible to achieve excellent device performance and color purity with low roll-off using noble-metal-free pure organic emitter.Despite sign... Hyperfluorescent organic light-emitting diodes(HF-OLEDs)approach has made it possible to achieve excellent device performance and color purity with low roll-off using noble-metal-free pure organic emitter.Despite significant progress,the performance of HF-OLEDs is still unsatisfactory due to the existence of a competitive dexter energy transfer(DET)pathway.In this contribution,two boron dipyrromethene(BODIPY)-based donor-acceptor emitters(BDP-C-Cz and BDP-N-Cz)with hybridized local and charge transfer characteristics(HLCT)are introduced in the HF-OLED to suppress the exciton loss by dexter mechanism,and a breakthrough performance with low-efficiency roll-off(0.3%)even at high brightness(1000 cd m-2)is achieved.It is demonstrated that the energy loss via the DET channel can be suppressed in HF-OLEDs utilizing the HLCT emitter,as the excitons from the dark triplet state of such emitters are funneled to its emissive singlet state following the hot-exciton mechanism.The developed HF-OLED device has realized a good maximum external quantum efficiency(EQE)of 19.25%at brightness of 1000 cd m-2and maximum luminance over 60000 cd m-2,with an emission peak at 602 nm and Commission International de L'Eclairage(CIE)coordinates(0.57,0.41),which is among the best-achieved results in solution-processed HF-OLEDs.This work presents a viable methodology to suppress energy loss and achieve high performance in the HF-OLEDs. 展开更多
关键词 BODIPY hyperfluorescence organic light-emitting diodes solution-process
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All solution-processed organic field-effect transistors with low contact resistance via interface engineering for high-performance flexible circuits 认领 引用 被引量：2
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作者 Miao Wu Cuili Chen +7 位作者 Fengmian Li Shen Zhang Hongyang Wang Jie Liu YongAn Huang Shenghan Gao Dacheng Wei Lang Jiang 《Science China Materials》 SCIE EI CAS CSCD 2025年第7期2246-2255,共10页
Solution-processed organic field-effect transistors(OFETs)are of great interest in both academia and industry because of the potential to reduce the production cost.However,the performance of these devices can be adve... Solution-processed organic field-effect transistors(OFETs)are of great interest in both academia and industry because of the potential to reduce the production cost.However,the performance of these devices can be adversely affected by the interfacial incompatibility between solution-deposited electrodes and organic semiconductors in comparison with conventional methods.To address this critical challenge,we developed all-solution processed OFETs with low contact resistance by utilizing a multifunctional buffer layer inserted on different commercial p-type semiconductors.The buffer layer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)is designed to effectively reduce the large Schottky barriers at the Ag/semiconductor interfaces.PEDOT:PSS also offers the function of proper affinity with Ag,resulting in the formation of hybrid PEDOT:PSS/Ag electrode patterns.High-performance poly[2,5-bis(alkyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione-alt-5,5′-di(thiophen-2-yl)-2,2′-(E)-2-(2-(thiophen-2-yl)vinyl)thiophene](PDVT-10)OFET including low contact resistance of 789Ωcm,high average mobility of 10.5 cm2V−1s−1,exceptional operational and bending stability,and a substantial enhancement in performance were realized compared to conventional methods.A pseudo-complementary inverter based on the fully solution-based and buffer layer approach was further developed,showing a voltage gain>260.Our approach can potentially overcome the device performance limitation and advance the development of low-cost,large-scale,flexible all-solution-processed OFETs. 展开更多
关键词 OFET solution-processed contact resistance inverter
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Star-shaped cross-linkable hole transport materials with high triplet energy and deep HOMO energy enable efficient solution-processed deep-blue TADF OLEDs 认领 引用 被引量：1
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作者 Jiaxu Bai Jingyuan Feng +4 位作者 Chuanxin Liao Tianhao Wang Shirong Wang Hongli Liu Xianggao Li 《Science China Materials》 SCIE EI CAS CSCD 2025年第9期3239-3249,共11页
Cross-linkable hole transport materials(x-HTMs)play a crucial role in solving the issue of interlayer mixing of solution-processed organic light-emitting diodes(OLEDs).However,issues such as energy level mismatch and ... Cross-linkable hole transport materials(x-HTMs)play a crucial role in solving the issue of interlayer mixing of solution-processed organic light-emitting diodes(OLEDs).However,issues such as energy level mismatch and low hole mobility hinder the application of x-HTMs in deep-blue OLEDs.In particular,thermally activated delayed fluorescent(TADF)emitters require HTMs with high triplet energies(E T)to ensure high exciton utilization efficiency.Here,two star-shaped cross-linkable HTMs 5-(9H-carbazol-9-yl)-N1,N3-di(p-tolyl)-N1,N3-bis(4-vinylphenyl)benzene-1,3-diamine(m-V-CzDPA)and N1,N1-diphenyl-N3,N5-di(p-tolyl)-N3,N5-bis(4-vinylphenyl)benzene-1,3,5-triamine(m-V-DPADPA)were designed and synthesized.Owing to their aromatic torsion structures,m-V-CzDPA and m-V-DPADPA possessed high E Ts of 2.89 and 2.87 eV,respectively,which can effectively confine triplet excitons in the emitting layer(EML).The carrier diffusion coefficients of their x-HTMs,x-m-CzDPA and x-m-DPADPA,which were obtained via carrier diffusion imaging characterization were 0.54 and 0.44 cm2 s-1,respectively,thus indicating outstanding intrinsic hole transport capacity,with hole mobilities of 4.30×10-4 and 1.39×10-4 cm2 V-1 s-1,respectively.Solution-processed deep-blue TADF-OLEDs employing x-m-CzDPA as the HTM achieved a maximum current efficiency/maximum external quantum efficiency of 5.25 cd A-1/18.06%,with CIE coordinates of(0.162,0.042).This is the first time that x-HTMs have served as efficient deep-blue TADF-OLEDs via a solution process,which also meets the latest BT.2020 standard(CIEy≤0.046). 展开更多
关键词 cross-linkable hole transport materials high triplet energy deep HOMO energy solution-processed TADF OLEDs
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Peripheral host engineering in TADF dendrimers:integrating radiative promotion and well-balanced bipolar transport for high-luminance,low-roll-off solution-processable OLEDs 认领 引用
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作者 Yuying Wu Wenkang Shi +6 位作者 Wenbo Yuan Yaotian Zhang Tao Wang Youtian Tao Jingsheng Wang Yunlong Guo Yunqi Liu 《Science China Chemistry》 SCIE EI CAS CSCD 2026年第7期3767-3774,共8页
Single-component solution-processed organic light-emitting diodes(OLEDs)that simultaneously achieve high luminance,high efficiency,and low efficiency roll-off represent a significant challenge.Herein,we report a serie... Single-component solution-processed organic light-emitting diodes(OLEDs)that simultaneously achieve high luminance,high efficiency,and low efficiency roll-off represent a significant challenge.Herein,we report a series of thermally activated delayed fluorescence(TADF)dendrimers(m-CzBr,m-CzPhCz,m-CzCzPh and m-CzTPA)featuring a 4CzIPN emissive core tethered to diverse peripheral host units via flexible alkoxy linkers.The localized LUMO on the 4CzIPN core ensures efficient electron transport,while systematic peripheral host modulation precisely tunes photophysical properties,HOMO levels,and charge transport properties.This molecular design leads to a dramatic improvement in device performance,with external quantum efficiency(EQE)rising from 0.76%(m-CzTPA)to 26.5%(m-CzPhCz)and the maximum luminance(Lmax)increasing from 4407 to 59812 cd m-2.The optimized dendrimer,m-CzPhCz,integrates a high photoluminescence quantum yield,satisfactory charge-transport capability,and highly balanced bipolar carrier transport.These synergistic characteristics facilitate the realization of solution-processed,non-doped TADF-OLEDs that exhibit high external quantum efficiency,together with record-breaking luminance and the smallest efficiency roll-off under high brightness.Impressively,the device achieves unprecedented EQE retention of 25.4%at 5000 cd m-2 and 24%at 10000 cd m-2. 展开更多
关键词 solution-processed organic light-emitting diodes thermally activated delayed fluorescence dendrimers host luminance balanced charge transport
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Solution-processed material innovation is sparking a research boom on X-ray imaging techniques 认领 引用
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作者 Haotong Wei 《Light: Advanced Manufacturing》 CSCD 2025年第3期6-7,共2页
X-ray-responsive materials are often expensive and limited because of the monopolistic and complex hightemperature crystallisation technology required.Solution-processed material innovation offers a low-cost and vast ... X-ray-responsive materials are often expensive and limited because of the monopolistic and complex hightemperature crystallisation technology required.Solution-processed material innovation offers a low-cost and vast design space for a new generation of X-ray detectors aimed at for high X-ray imaging performance. 展开更多
关键词 X-ray imaging Solution-processable Large area
Recent Progress in All-Solution-Processed Organic Solar Cells 认领 引用 被引量：1
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作者 Yixuan Xu Qian Wang +5 位作者 Wentao Zou Xu Zhang Yanna Sun Yuanyuan Kan Ping Cai Ke Gao 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2024年第2期190-198,共9页
All-solution-processed organic solar cells(OSCs)(from the bottom electrode to the top electrode)are highly attractive thanks to their low cost,lightweight and high-throughput production.However,achieving highly effici... All-solution-processed organic solar cells(OSCs)(from the bottom electrode to the top electrode)are highly attractive thanks to their low cost,lightweight and high-throughput production.However,achieving highly efficient all-solution-processed OSCs remains a significant challenge.One of the key issues is the lack of high-quality solution-processed electrode systems that can replace indium tin oxide(ITO)and vacuum-deposited metal electrodes.In this paper,we comprehensively review recent advances in all-solution-processed osCs,and classified the devices as the top electrode materials,including silver nanowires(AgNWs),conducting polymers and composite conducting materials.The correlation between electrode materials,properties of electrodes,and device performance in all-solution-processed OSCs is elucidated.In addition,the critical roles of the active layer and interface layer are also discussed.Finally,the prospects and challenges of all-solution-processed OSCs are presented. 展开更多
关键词 Organic solar cells All-solution-processed organic solar cells Solution-processed electrodes High performance Silver nanowires Conductive polymers Composite conducting materials
Solution-processed n-type Bi_2Te3-xSe_x nanocomposites with enhanced thermoelectric performance via liquid-phase sintering 认领 引用 被引量：5
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作者 Chaohua Zhang Chunxiao Zhang +1 位作者 Hongkuan Ng Qihua Xiong 《Science China Materials》 SCIE EI CAS CSCD 2019年第3期389-398,共10页
The much slower progress in enhancing the thermoelectric performance of n-type Bi2Te3 than that of p-type Bi2Te3 based materials in the past decade hinders the widespread use in power generation and refrigeration. Her... The much slower progress in enhancing the thermoelectric performance of n-type Bi2Te3 than that of p-type Bi2Te3 based materials in the past decade hinders the widespread use in power generation and refrigeration. Here, a facile bottom-up solution-synthesis with spark plasma sintering(SPS) process has been developed to build n-type Bi2Te3-xSex bulk nanocomposites, which substantially improves the power factor and decreases the lattice thermal conductivity by tuning the interface scattering of phonons and electrons. The stoichiometric composition in ternary Bi2Te3-xSex nanocomposites is also tuned to optimize the carrier concentration and lattice thermal conductivity. The optimized bulk nanocomposite Bi2Te2.7Se0.3 exhibits a ZT of 1.1 at^371 K, which is comparable to the corresponding commercially available ingots. Our results demonstrate the great potential of the solution-processed n-type Bi2Te3-xSex nanocomposites for cost-effective thermoelectric applications. 展开更多
关键词 thermoelectric liquid-phase sintering nanocomposites solution-processed bismuth telluride
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Preparation and properties of solution-processed zinc tin oxide films from a new organic precursor 认领 引用 被引量：1
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作者 ZHAO YunLong DUAN Lian +4 位作者 QIAO Juan ZHANG DeQiang DONG GuiFang WANG LiDuo QIU Yong 《Science China Chemistry》 SCIE EI CAS 2011年第4期651-655,共5页
Transparent,smooth and dense zinc tin oxide(ZTO)thin films have been successfully produced by using a new precursor solution,zinc acetate and tin(II)2-ethylhexanoate mixed with 2-ethanolamine in methoxyethanol.The ZTO... Transparent,smooth and dense zinc tin oxide(ZTO)thin films have been successfully produced by using a new precursor solution,zinc acetate and tin(II)2-ethylhexanoate mixed with 2-ethanolamine in methoxyethanol.The ZTO films have been prepared by spin-coating,followed by thermal treatment in oxygen atmosphere.The morphology,composition,crystallinity and band gap energy(Eg)of the ZTO thin films have been characterized by Atomic Force Microscopy(AFM),Atomic Emission Spectrometry(AES),X-ray Diffraction(XRD)and UV-vis spectrophotometry.The conductivity of ZTO is about 9.8×10-9 S/cm,as estimated from the current-voltage(I-V)curve.The effect of the thermal treatment process on the morphology of ZTO thin films is also discussed. 展开更多
关键词 zinc tin oxide(ZTO) solution-processed organic precursor thermal treatment process conductivity transparent
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Resonance hosts for high efficiency solution-processed blue and white electrophosphorescent devices 认领 引用
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作者 Huanhuan Li Jibiao Jin +7 位作者 Yuan Xiang Ying Zhang Ye Tao Mingguang Li Qin Xue Guohua Xie Wei Huang Runfeng Chen 《Science China Chemistry》 SCIE EI CAS CSCD 2020年第11期1645-1651,共7页
The exploration of high-performance solution-processible host materials for blue and white electrophosphorescent devices is a key and fundamental challenge in the ongoing development of organic semiconductors.Herein,t... The exploration of high-performance solution-processible host materials for blue and white electrophosphorescent devices is a key and fundamental challenge in the ongoing development of organic semiconductors.Herein,two solution-processible resonance host materials with self-adaptive characteristics are delicately designed and constructed.Because of the dynamic tautomerization upon resonance variation,these smart hosts show self-adaptive and selectively enhanced charge carrier flux at high triplet energy levels.Conferred by the resonance molecules,solution-processed blue and white devices exhibit excellent maximum current efficiencies(CEs)of 29.8 and 57.3 cd A−1,and external quantum efficiencies(EQEs)up to 14.5%and 23.5%,respectively.Our works highlight the significant progress of the solution-processed phosphorescent organic light-emitting diodes(PhOLEDs)using resonance host molecules,potentially furnishing a leap forward in constructing advanced organic semiconductors for next-generation optoelectronic devices. 展开更多
关键词 solution-processed resonance hosts dynamic self-adaptation high-efficiency electrophosphorescence
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Efficient Polymer Solar Cells Based on Solution-processed Vanadium Oxide as Hole-extracting Layer 认领 引用
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作者 Biao Xiao Xiaoping Cheng +1 位作者 Baofeng Zhao Hongbin Wu 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2013年第11期1423-1427,共5页
Here we reported the fabrication of efficient polymer solar cells from regioregular poly(3-hexylthiophene)(P3HT):fullerene derivative[6,6]-phenyl-C61 butyric acid methyl ester(PC6jBM)mixtures,in which solution-process... Here we reported the fabrication of efficient polymer solar cells from regioregular poly(3-hexylthiophene)(P3HT):fullerene derivative[6,6]-phenyl-C61 butyric acid methyl ester(PC6jBM)mixtures,in which solution-processed vanadium oxide(VOx)was used as a hole-extracting layer(HEL).The obtained devices exhibited a high power conversion efficiency of 3.96%,and can be enhanced to 4.06%and 4.16%,respectively,when two types of PEDOT:PSS with different conductivities were used in conjunction with the VOx layer.All the VOx-based devices showed a high fill factor(FF)over 70%,which was ascribed to efficient hole extracting efficiency associated with the solution-processed VOx hole-extracting layer.The origins of the improvement were also studied by transmission spectra,atomic force microscope(AFM),and capacitance-voltage characteristics. 展开更多
关键词 polymer solar cells vanadium oxide hole-extracting layer solution-processed
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