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Efficient and stable inverted perovskite solar cells employing self-assembled hole-transporting monolayers with enhanced interface interaction 认领 引用 被引量：1
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作者 Botong Li Jie Liu +11 位作者 Boyang Lu Xuepeng Liu Mingyuan Han Weilun Du Ziqiang Su Zedong Lin Wenyong Feng Lei Xiao Zhipeng Shao Yong Ding Songyuan Dai Mohammad Khaja Nazeeruddin 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第1期712-719,I0016,共8页
Molecular tailoring of self-assembled hole-transporting monolayers(SAMs)has been proven as an efficient approach for improving the device performance of inverted perovskite solar cells.Herein,a novel SAM with extended... Molecular tailoring of self-assembled hole-transporting monolayers(SAMs)has been proven as an efficient approach for improving the device performance of inverted perovskite solar cells.Herein,a novel SAM with extended conjugation is designed and synthesized,named NaPh-4PACz.Compared to Ph-4PACz,NaPh-4PACz exhibits a larger adsorption energy with the ITO substrate,enabling the formation of a more uniform and dense film,thereby preventing direct contact between the perovskite and ITO.Additionally,NaPh-4PACz also has a stronger interaction with the perovskite,which can reduce buried interface defects and suppress non-radiative recombination.Consequently,NaPh-4PACz-based devices achieved a power conversion efficiency of 25.48%due to their interfacial“adhesive”ability.Importantly,the stability of the NaPh-4PACz-based devices was significantly improved. 展开更多
关键词 Inverted perovskite solar cells Self-assembled monolayer Hole transport layer Extended conjugation NaPh-4PACz
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Improving the performance of arylamine-based hole transporting materials in perovskite solar cells: Extending π-conjugation length or increasing the number of side groups? 认领 引用 被引量：2
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作者 Xuepeng Liu Fantai Kong +7 位作者 Wangchao Chen Ting Yu Yin Huang Tasawar Hayat Ahmed Alsaedi Hongxia Wang Jian Chen Songyuan Dai 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第5期1409-1414,共6页
In this work, we prepared three simple arylamine-based hole transporting materials from commercially available starting materials. The effect of extending z-conjugation length or increasing the number of side groups c... In this work, we prepared three simple arylamine-based hole transporting materials from commercially available starting materials. The effect of extending z-conjugation length or increasing the number of side groups compared with reference compound on the photophysical, electrochemical, hole mobility properties and performance in perovskite solar cells were further studied. It is noted that these two kinds of molecular modifications can significantly lower the HOMO level and improve the hole mobility, thus improving the hole injection from valence band of perovskite. On the other hand, the compound with more side groups showed higher hole injection efficiency due to lower HOMO level and higher hole mo- bility compared with the compound with extending π-conjugation length. The perovskite solar cells with the modified molecules as hole transporting materials showed a higher efficiency of 15.40% and 16.95%, respectively, which is better than that of the reference compound （13.18%）. Moreover, the compound with increasing number of side groups based devices showed comparable photovoltaic performance with that of conventional spiro-OMeTAD （16.87%）. 展开更多
关键词 Hole transporting materials Perovskite π-conjugation length Side groups
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Pyridine-triphenylamine hole transport material for inverted perovskite solar cells 认领 引用 被引量：1
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作者 Shuang Ma Xianfu Zhang +5 位作者 Xuepeng Liu Rahim Ghadari Molang Cai Yong Ding Muhammad Mateen Songyuan Dai 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第3期395-402,共8页
In the light of superior interaction between pyridine unit and perovskite,a facile star-shaped triphenylamine-based hole transport material(HTM)incorporating pyridine core(coded as H-Pyr)is designed and synthesized.A ... In the light of superior interaction between pyridine unit and perovskite,a facile star-shaped triphenylamine-based hole transport material(HTM)incorporating pyridine core(coded as H-Pyr)is designed and synthesized.A reference HTM with benzene core,coded as H-Ben,is also prepared for a comparative study.The effects of varying core on HTMs are investigated by comparing the photophysical,electrochemical and hole mobility properties.It is found that pyridine core exhibits better conjunction and decreased dihedral angles with triphenylamine side arms than that of benzene,leading to obviously better hole mobility and well-matched work function.The perovskite film prepared on H-Pyr also shows improved crystallization than on H-Ben.Photoluminescence and electrochemical impedance studies indicate improved charge extraction and reduced recombination in the H-Pyr-based perovskite solar cells.Consequently,H-Pyr-based device exhibits higher efficiency than H-Ben-based one.After doping with a Lewis acid,tris(pentafluorophenyl)borane,H-Pyr-based device delivers a champion efficiency of 17.09%,which is much higher compared with 12.14% of the device employing conventional poly(3,4-ethy lenedioxythiophene)polystyrene sulfonate(PEDOT:PSS)as HTM.Moreover,the H-Pyr-based device displays good long-term stability that the power conversion efficiency remains over 80% of the initial value after storage in ambient(relative humidity=50±5%)for 20 days. 展开更多
关键词 Perovskite solar cell Hole transport material Pyridine-triphenylamine small molecule
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Molecular-dynamics investigation of the simple droplet critical wetting behavior at a stripe pillar edge defect 认领 引用
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作者 Xiaolong Liu Chengyun Hong +3 位作者 Yong Ding Xuepeng Liu Jianxi Yao Songyuan Dai 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第1期447-452,共6页
The microscopic stripe pillar is one of the most frequently adopted building blocks for hydrophobic substrates.However,at high temperatures the particles on the droplet surface readily evaporate and re-condense on the... The microscopic stripe pillar is one of the most frequently adopted building blocks for hydrophobic substrates.However,at high temperatures the particles on the droplet surface readily evaporate and re-condense on the pillar sidewall,which makes the droplet highly unstable and undermines the overall hydrophobic performance of the pillar.In this work,molecular dynamics(MD)simulation of the simple liquid at a single stripe pillar edge defect is performed to characterize the droplet's critical wetting properties considering the evaporation–condensation effect.From the simulation results,the droplets slide down from the edge defect with a volume smaller than the critical value,which is attributed to the existence of the wetting layer on the stripe pillar sidewall.Besides,the analytical study of the pillar sidewall and wetting layer potential field distribution manifests the relation between the simulation parameters and the degree of the droplet pre-wetting,which agrees well with the MD simulation results. 展开更多
关键词 molecular-dynamics simulation simple liquid single stripe critical wetting
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C≡N-based carbazole-arylamine hole transporting materials for perovskite solar cells: Substitution position matters 认领 引用
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作者 Zi'an Zhou Xianfu Zhang +6 位作者 Rahim Ghadari Xuepeng Liu Wenjun Wang Yong Ding Molang Cai Jia Hong Pan Songyuan Dai 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第11期563-571,I0013,共9页
Hole transporting materials(HTMs)containing passivating groups for perovskite materials have attracted much attention for efficient and stable perovskite solar cells(PSCs).Among them,C≡N-based molecules have been pro... Hole transporting materials(HTMs)containing passivating groups for perovskite materials have attracted much attention for efficient and stable perovskite solar cells(PSCs).Among them,C≡N-based molecules have been proved as efficient HTMs.Herein,a series of novel C≡N functionalized carbazole-arylamine derivatives with variable C≡N substitution positions(para,meta,and ortho)on benzene-carbazole skeleton(on the adjacent benzene of carbazole)were synthesized(p-HTM,m-HTM and o-HTM).The experimental results exhibit that the substitution positions of the Ctriple bondN unit on HTMs have minor difference on the HOMO energy level and hydrophobicity.m-HTM has a relatively lower glass transition temperature compared with that of p-HTM and o-HTM.The functional theory calculations show that the C≡N located on meta position exposed very well,and the exposure direction is also the same with the methoxy.Upon applying these molecules as HTMs in PSCs,their device performance is found to sensitively depend on the substitution position of the C≡N unit on the molecule skeleton.The devices using m-HTM and o-HTM exhibit better performance than that of p-HTM.Moreover,m-HTM-based devices exhibit better light-soaking performance and long-term stability,which could be resulted from better interaction with the perovskite according to DFT results.Moreover,we further prepared a HTM with two C≡N units on the symmetrical meta position of molecular skeleton(2m-HTM).Interestingly,2m-HTM-based devices exhibit relatively inferior performance compared with that of the m-HTM,which could be resulted from weak negative electrical character of C≡N unit on 2m-HTM.The results give some new insights for designing ideal HTM for efficient and stable PSCs. 展开更多
关键词 Hole transporting materials Cyano group Substitution position Perovskite solar cells
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Heteroatom engineering on spiro-type hole transporting materials for perovskite solar cells 认领 引用
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作者 Xianfu Zhang Xuepeng Liu +7 位作者 Nan Wu Rahim Ghadari Mingyuan Han Ying Wang Yong Ding Molang Cai Zuopeng Qu Songyuan Dai 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第4期19-26,共8页
A series of spiro-type hole transporting materials, spiro-OMe TAD, spiro-SMe TAD and spiro-OSMe TAD,with methoxy, methylsulfanyl or half methoxy and half methylsulfanyl terminal groups are designed and prepared. The i... A series of spiro-type hole transporting materials, spiro-OMe TAD, spiro-SMe TAD and spiro-OSMe TAD,with methoxy, methylsulfanyl or half methoxy and half methylsulfanyl terminal groups are designed and prepared. The impact of varied terminal groups on bulk properties, such as photophysical, electrochemical, thermal, hole extraction, and photovoltaic performance in perovskite solar cells is investigated.It is noted that the terminal groups of the hole transporting material with half methoxy and half methylsulfanyl exhibit a better device performance and decreased hysteresis compared with all methoxy or methylsulfanyl counterparts due to better film-forming ability and improved hole extraction capability.Promisingly, the spiro-OSMe TAD also shows comparable performance than high-purity commercial spiro-OMe TAD. Moreover, the highest power conversion efficiency of the optimized device employing spiro-OSMe TAD exceeding 20% has been achieved. 展开更多
关键词 Hole transporting materials Methylsulfanyl Methoxy Perovskite solar cells
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Enlarging grain sizes for efficient perovskite solar cells by methylamine chloride assisted recrystallization 认领 引用 被引量：3
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作者 Gao Wu Molang Cai +9 位作者 Yujia Cao Zhuoxin Li Zhongyan Zhang Weng Yang Xianggang Chen Dongxu Ren Yaqi Mo Miao Yang Xuepeng Liu Songyuan Dai 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第2期55-61,共7页
The quality of MAPbI3 film prepared by solvent engineering process highly depends on environment and antisolvent control.Here,we provided a simple methylamine chloride(MACl)solution treatment using a two-step process ... The quality of MAPbI3 film prepared by solvent engineering process highly depends on environment and antisolvent control.Here,we provided a simple methylamine chloride(MACl)solution treatment using a two-step process to enlarge the perovskite crystal grain sizes to more than 1 lm.Other than treatment on the film surface,the MACl solution diffuses into the MAPbI3 films to assist the recrystallization of small crystal at the bottom of perovskite film.The imitative contact between perovskite and substrate is formed.Meanwhile,the enlargement of grain size and ten times enhancement of crystalline reduce trap-assisted recombination of perovskite films.Thus,the significant improvement of cell efficiency of 20.89%as well as device stability is obtained with the MACl treatment. 展开更多
关键词 Perovskite solar cells Methylamine chloride Large grain size High efficiency
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聚碳酸酯型形状记忆聚氨酯的合成与表征 认领 引用 被引量：8
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作者 李帅 张均 +3 位作者 陈建君 李淑君 刘学鹏 姜志国 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2019年第1期1-6,共6页
以碳化二亚胺改性MDI(MM103)、1,4-丁二醇(BDO)和聚碳酸1,6-己二醇酯二醇(PCDL)为原料,采用一步熔融法合成了系列聚碳酸酯型形状记忆聚氨酯弹性体(PCPU)。通过红外测试、差示扫描量热测试、硬度测试、拉伸强度测试、吸水率测试和形状记... 以碳化二亚胺改性MDI(MM103)、1,4-丁二醇(BDO)和聚碳酸1,6-己二醇酯二醇(PCDL)为原料,采用一步熔融法合成了系列聚碳酸酯型形状记忆聚氨酯弹性体(PCPU)。通过红外测试、差示扫描量热测试、硬度测试、拉伸强度测试、吸水率测试和形状记忆性能测试研究了硬段含量对材料性能的影响。结果表明,随着硬段含量的增加,PCPU的硬度逐渐增大,吸水率、拉伸强度和断裂伸长率均是先增加后减小;硬段含量为15%～20%时,PCPU的形状固定率和形状恢复率最高。 展开更多
关键词 形状记忆 聚氨酯 聚碳酸酯型 硬段含量
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自组装单分子空穴传输层在反式钙钛矿太阳电池的研究进展 认领 引用 被引量：3
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作者 刘雪朋 李博桐 +3 位作者 韩明远 张先付 陈建林 戴松元 《化学学报》 SCIE CAS CSCD 北大核心 2024年第3期348-366,共19页
空穴传输层在钙钛矿太阳电池(Perovskite solar cell, PSC)中起着抽取和传输钙钛矿层产生的光生空穴、抑制电子回流等重要作用,是构成高性能器件的重要组成部分.经典的空穴传输材料,如2,2',7,7'-四[N,N-二(4-甲氧基苯基)氨基]-9... 空穴传输层在钙钛矿太阳电池(Perovskite solar cell, PSC)中起着抽取和传输钙钛矿层产生的光生空穴、抑制电子回流等重要作用,是构成高性能器件的重要组成部分.经典的空穴传输材料,如2,2',7,7'-四[N,N-二(4-甲氧基苯基)氨基]-9,9'-螺二芴(spiro-OMe TAD)、聚[双(4-苯基)(2,4,6-三甲基苯基)胺](PTAA)等,空穴迁移率低、价格昂贵等缺点限制了其规模化应用.近年来,在反式PSC中自组装单分子层(self-assembledmonolayers,SAM)作为空穴传输层广泛应用,提升了器件性能.SAM分子结构中含有锚定官能团,可以在衬底上形成单分子薄膜,有着材料消耗小、无需添加剂、寄生吸收低、能够兼容叠层器件和有利于大面积制造等优点,已成为PSC领域的研究热点.本综述结合PSC发展,按照SAM分子结构中锚定基团的不同,对近年来基于SAM的空穴传输层的研究进行了分类和归纳,结合分子骨架变化分析了结构变化对其特性及器件性能的影响.最后,对SAM作为空穴传输层的发展做了总结和展望. 展开更多
关键词 钙钛矿太阳电池 空穴传输材料 自组装单分子层 光电转换效率 稳定性
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全无机钙钛矿太阳电池的制备及稳定性 认领 引用 被引量：2
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作者 彭会荣 蔡墨朗 +3 位作者 马爽 时小强 刘雪朋 戴松元 《化学进展》 SCIE CAS CSCD 北大核心 2021年第1期136-150,共15页
全无机钙钛矿太阳电池因其热稳定性好、载流子迁移率高,可用于制备叠层电池等优点备受关注。随着人们对全无机钙钛矿太阳电池的深入研究和制备工艺的持续优化,全无机钙钛矿太阳电池的光电转换效率已经突破19%。然而,全无机钙钛矿材料相... 全无机钙钛矿太阳电池因其热稳定性好、载流子迁移率高,可用于制备叠层电池等优点备受关注。随着人们对全无机钙钛矿太阳电池的深入研究和制备工艺的持续优化,全无机钙钛矿太阳电池的光电转换效率已经突破19%。然而,全无机钙钛矿材料相稳定性较差,这使得实现全无机钙钛矿太阳电池在空气环境下制备和长期使用面临巨大挑战。众多科研工作者通过分析全无机钙钛矿材料的相变机制,有针对性地提出了包括添加剂工程、界面工程和开发全无机钙钛矿量子点电池等多种方式来改善全无机钙钛矿太阳电池的长期稳定性。本综述从全无机钙钛矿材料与电池的结构、活性层制备方法和稳定性研究三个方面总结了近年来关于全无机钙钛矿太阳电池的研究进展。 展开更多
关键词 钙钛矿太阳电池 全无机钙钛矿 制备方法 相稳定性 添加剂
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Dual-mode α-FA-based perovskite memristors with volatile and nonvolatile switching for neuromorphic computing and handwritten digit recognition 认领 引用 被引量：1
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作者 Bowen Jiang Yang Xiong +7 位作者 Xuepeng Liu Yingjian Shi Wentao Zhao Guokun Ma Jun Zhang Houzhao Wan Li Tao Hao Wang 《Science China Materials》 SCIE EI CAS CSCD 2026年第2期704-714,共11页
Halide perovskite memristors,known for their ion mobility,have emerged as strong candidates for computational units in next-generation memory and neuromorphic computing systems.Nevertheless,most memristors are limited... Halide perovskite memristors,known for their ion mobility,have emerged as strong candidates for computational units in next-generation memory and neuromorphic computing systems.Nevertheless,most memristors are limited to operating in a single mode,either resistive switching or threshold switching.In this work,we overcome this limitation by developing dual-modeα-formamidinium lead triiodide(α-FAPbI3)perovskite memristors with switchable volatileonvolatile states,enabled by engineered SnO2 electron transport layers(ETLs).Through molecular interface optimization using 3-(N,N′-dimethylmyristylammonio)propanesulfonate(Z14)and 4,4′-(1,10-phenanthroline-3,8-diyl)bis(N,N′-bis(4-methoxyphen-yl)aniline)(PNL),we achieved exceptional device stability.Volatile devices exhibited>500 switching cycles,while nonvolatile devices surpassed 1000 cycles,both maintaining a high on/off ratio(~103).Beyond memory applications,these devices successfully emulated biological functionalities.The volatile mode replicated four key nociceptor characteristics(threshold,relaxation,sensitization,and no adaptation),while the nonvolatile mode demonstrated advanced synaptic plasticity,including paired-pulse facilitation(PPF)and spike-timing-dependent plasticity(STDP).Capitalizing on this dual-mode synergy,we constructed a spiking neural network(SNN)for handwritten digit recognition,achieving a 93%accuracy rate—a significant milestone for perovskite-based neuromorphic systems.This study not only provides a material-level strategy for multifunctional memristor design but also bridges the gap between biological sensing and artificial intelligence,paving the way for adaptive neuromorphic hardware. 展开更多
关键词 perovskite memristor volatile and nonvolatile switching neuromorphic computing interfacial engineering synaptic plasticity
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钙钛矿太阳电池中螺环小分子空穴传输材料 认领 引用 被引量：1
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作者 周颖 刘雪朋 +7 位作者 张先付 韩明远 陈建林 梁永鹏 李博桐 丁勇 蔡墨朗 戴松元 《化学进展》 SCIE CAS CSCD 北大核心 2024年第5期613-632,共20页
空穴传输材料的性能直接影响钙钛矿太阳电池中空穴在电池中的传输和电子-空穴的复合,从而决定电池性能。螺环结构特殊的正交分子构象使分子易于在钙钛矿薄膜上形成良好的接触、具有均匀的电荷传输特性、较高的玻璃化转变温度等优点,该... 空穴传输材料的性能直接影响钙钛矿太阳电池中空穴在电池中的传输和电子-空穴的复合,从而决定电池性能。螺环结构特殊的正交分子构象使分子易于在钙钛矿薄膜上形成良好的接触、具有均匀的电荷传输特性、较高的玻璃化转变温度等优点,该材料已广泛作为高效空穴传输材料骨架单元应用于钙钛矿太阳电池。本论文概述了小分子螺环空穴传输材料的研究进展,主要从分子末端官能团优化和螺环核调控两个方面总结了分子结构变化对材料光物理、电化学、热稳定性、空穴传输特性及在钙钛矿太阳电池中的性能等的影响,同时本论文也对该领域的发展和高性能螺环空穴传输材料的发展和研究趋势进行了预测。 展开更多
关键词 钙钛矿太阳电池 空穴传输材料 螺环结构 光电转换效率
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Digital twin assisted improved transformer multidimensional time series for fault prediction of automatic transverse robots 认领 引用 被引量：1
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作者 Weiwei Ye Xuepeng Liu +3 位作者 Xinchun Zhao Hongbiao Fu Yongbin Cai Yi Sun 《Digital Twin》 2025年第4期193-212,共20页
An automatic transverse robot(ATR)can transport large and heavy material rolls from a vertical to horizontal position onto an automated guided vehicle or to designated areas in an automated and intelligent flexible pa... An automatic transverse robot(ATR)can transport large and heavy material rolls from a vertical to horizontal position onto an automated guided vehicle or to designated areas in an automated and intelligent flexible packaging printing workshop.The degradation and fault prediction of the ATR can help ensure the safe and efficient operation of the robot.A digital twin-assisted improved transformer multidimensional time series method was proposed by integrating information from a physical-based model and data.It incorporated position information through a novel rotational position encoding(RoPE)of multidimensional time-series data,and the attention mechanism was weighted twice by temporal hybrid drift weighting.Fault prediction of the ATR was achieved by digital twin based mutual feedback synchronisation in virtual reality and adaptive learning based on improved transformer multidimensional time series data.The key performance metrics MSE,MAE and F1-score were 0.00743,0.001427,and 0.9129,respectively.It predicted deviations beyond the safe error range and successfully anticipated potential behavioural faults such as collision and roll slipping,which were caused by the inadequate pressure of the expansion shaft rod.It enabled visual fault prediction and virtual feedback regulation,avoiding accidents and ensuring safety and reliability in an intelligent flexible packaging printing workshop. 展开更多
关键词 Automatic transverse robot digital twin improved transformer fault prediction
Self-assembled α-MnO2 urchin-like microspheres as a high-performance cathode for aqueous Zn-ion batteries 认领 引用 被引量：10
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作者 Yunzhao Wu Ye Tao +7 位作者 Xianfu Zhang Kai Zhang Shengbin Chen Yu Liu Yong Ding Molang Cai Xuepeng Liu Songyuan Dai 《Science China Materials》 SCIE EI CAS CSCD 2020年第7期1196-1204,共9页
Aqueous Zn-ion batteries(AZIBs)are one of the promising battery technologies for the green energy storage and electric vehicles.As one attractive cathode material for AZIBs,α-MnO2 materials exhibit superior electroch... Aqueous Zn-ion batteries(AZIBs)are one of the promising battery technologies for the green energy storage and electric vehicles.As one attractive cathode material for AZIBs,α-MnO2 materials exhibit superior electrochemical properties.However,their long-term reversibility is still in great suspense.Considering the decisive effect of the structure and morphology on theα-MnO2 materials,hierarchicalα-MnO2 materials would be promising to improve the cycle performance of AZIB.Here,we synthesized theα-MnO2 urchin-like microspheres(AUM)via a self-assembled method.The porous microspheres composed of one-dimensionalα-MnO2 nanofibers with high crystallinity,which improved the surface area and active sites for Zn2+intercalation.The AUM-based AZIB realized a high initial capacity of 308.0 mA hg-1,and the highest energy density was 396.7 W hkg-1.The kinetics investigation confirmed the high capacitive contribution and fast ion diffusion of the AUM.Ex-situ XRD measurement further verified the synergistic insertion/extraction of H+and Zn2+ions during the charge/discharge process.The superiority of the AUM guaranteed good electrochemical performance and reversible phase evolution,and this application would promote the follow-up research on the advanced AZIB. 展开更多
关键词 aqueous Zn-ion batteries α-MnO2 urchin-like microspheres fast ion diffusion coefficients reversible phase evolution synergistic H+-Zn2+insertion/extraction
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Elucidating the dynamics of solvent engineering for perovskite solar cells 认领 引用 被引量：7
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作者 Zulqarnain Arain Cheng Liu +7 位作者 Yi Yang M.Mateen Yinke Ren Yong Ding Xuepeng Liu Zulfiqar Ali Manoj Kumar Songyuan Dai 《Science China Materials》 SCIE EI CAS CSCD 2019年第2期161-172,共12页
Researchers working in the field of photovoltaic are exploring novel materials for the efficient solar energy conversion.The prime objective of the discovery of every novel photovoltaic material is to achieve more ene... Researchers working in the field of photovoltaic are exploring novel materials for the efficient solar energy conversion.The prime objective of the discovery of every novel photovoltaic material is to achieve more energy yield with easy fabrication process and less production cost features.Perovskite solar cells (PSCs)delivering the highest efficiency in the passing years with different stoichiometry and fabrication modification have made this technology a potent candidate for future energy conversion materials.Till now,many studies have shown that the quality of active layer morphology,to a great extent,determines the performance of PSCs.The current and potential techniques of solvent engineering for good active layer morphology are mainly debated using primary solvent,co-solvent (Lewis acid-base adduct approach)and solvent additives.In this review,the dynamics of numerously reported solvents on the morphological characteristics of PSCs active layer are discussed in detail.The intention is to get a clear understanding of solvent engineering induced modifications on active layer morphology in PSC devices via different crystallization routes.At last,an attempt is made to draw a framework based on different solvent coordination properties to make it easy for screening the potent solvent contender for desired PSCs precursor for a better and feasible device. 展开更多
关键词 perovskite solvent engineering Lewis acid-base additive coordination property
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Photo-stable perovskite solar cells with reduced interfacial recombination losses using a CeO interlayer 认领 引用
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作者 Xiaoqiang Shi Ye Tao +5 位作者 Zhuoxin Li Huirong Peng Molang Cai Xuepeng Liu Zhongyan Zhang Songyuan Dai 《Science China Materials》 SCIE EI CAS CSCD 2021年第8期1858-1867,共10页
Despite demonstrating remarkable power conversion efficiencies(PCEs), perovskite solar cells(PSCs) have not yet achieved their full potential. In particular, the interfaces between the perovskite and charge transport ... Despite demonstrating remarkable power conversion efficiencies(PCEs), perovskite solar cells(PSCs) have not yet achieved their full potential. In particular, the interfaces between the perovskite and charge transport layers account for the vast majority of the recombination losses.Interfacial contact and band alignment between the lowtemperature-processed TiO2 electron transport layer(ETL)and the perovskite are essential to minimize nonradiative recombination losses. In this study, a CeOx interlayer is employed to modify the perovskite/TiO2 interface, and the charge transport properties of the devices are investigated. The bilayer-structured TiO2/CeOx ETL leads to the modification of the interface energetics, resulting in improved electron extraction and reduced nonradiative recombination in the PSCs.Devices based on TiO2/CeOx ETL exhibit a high open-circuit voltage(Voc) of 1.13 V and an enhanced PCE of more than 20%as compared with Vocof 1.08 V and a PCE of approximately 18% for TiO2-based devices. Moreover, PSCs based on TiO2/CeOx ETL maintain over 88% of their initial PCEs after light illumination for 300 min, whereas PSCs based on TiO2 ETL almost failed. This study provides an efficient strategy to enhance the PCE and stability of PSCs based on a lowtemperature-processed TiO2 ETL. 展开更多
关键词 perovskite solar cell interface passivation recombination light stability CeOx
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Boosting optoelectronic performance of MAPbI3 perovskite solar cells via ethylammonium chloride additive engineering 认领 引用 被引量：1
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作者 Muhammad Mateen Zulqarnain Arain +9 位作者 Xuepeng Liu Atif Iqbal Yingke Ren Xianfu Zhang Cheng Liu Qin Chen Shuang Ma Yong Ding Molang Cai Songyuan Dai 《Science China Materials》 SCIE EI CAS CSCD 2020年第12期2477-2486,共10页
The quality of the perovskite light absorption layer plays a dynamic role in the photovoltaic properties of solar cells.The existing methods to prepare methylammonium lead iodide(MAPbI3)films render substantial struct... The quality of the perovskite light absorption layer plays a dynamic role in the photovoltaic properties of solar cells.The existing methods to prepare methylammonium lead iodide(MAPbI3)films render substantial structural defect density,particularly at the grain boundaries and film surface,constituting a challenge that hinders the further optoelectronic enhancement of perovskite solar cells.Herein,a unique approach was introduced:using a simple ethylammonium chloride(EACl)additive in perovskite precursor mixture to produce high-quality MAPbI3 thin films.The results indicated that EACl could encourage perovskite crystal growth without experiencing the intermediate phase formation and would evaporate from the perovskite after annealing.Additionally,a gradient perovskite structure was achieved using this technique,which impressively enhanced the performance of the perovskite films.A high power conversion efficiency(PCE)of 20.03%was achieved under the optimal amount of EACl,and the resultant efficient device could retain over 89%of the original PCE after aging for 1000 h at room temperature.This novel technique leads to a facile fabrication of highquality and less-defect perovskite thin films for competent and stable devices. 展开更多
关键词 perovskite solar cells ethylammonium chloride crystal growth stability
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