期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到108篇文章
< 1 2 … 6 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Overcoming challenges in InP-based quantum dots:from nucleation mechanisms to high-performance quantum dot light-emitting diodes 认领 引用
1
作者 Yangyang Bian Qian Li +3 位作者 Fei Chen Chunhe Yang Huaibin Shen Aiwei Tang 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2026年第3期42-79,共38页
Indium phosphide-based quantum dots(InP-based QDs)have emerged as promising candidates for nextgeneration display and optoelectronic technologies,offering exceptional photoluminescent(PL)properties including high effi... Indium phosphide-based quantum dots(InP-based QDs)have emerged as promising candidates for nextgeneration display and optoelectronic technologies,offering exceptional photoluminescent(PL)properties including high efficiency,narrow emission spectra,and precisely tunable wavelengths.Nevertheless,their widespread commercialization encounters substantial obstacles,primarily stemming from persistent challenges in synthetic control and material processing.Critical performance parameters—including photoluminescence quantum yield(PL QY,currently35 nm)as well as external quantum efficiency(EQE)and operational stability of device—continue to show only incremental improvements,highlighting the urgent need for fundamental breakthroughs in QDs synthesis,surface engineering and device optimization.This review systematically examines the nucleation mechanisms governing InP core formation and outlines key strategies for optimizing InP-based core/shell QDs.Furthermore,we present a comprehensive analysis of recent breakthroughs in red,green,and blue-emitting InP-based QD light-emitting diodes(QLEDs)development,focusing on modulation of charge transport engineering and suppression of charge leakage.Finally,we critically evaluate the remaining commercialization challenges and future prospects for InP-based QLEDs in next-generation display and optoelectronic technologies,outlining potential pathways for overcoming current limitations. 展开更多
关键词 indium phosphide quantum dot nucleation mechanism core/shell engineering ligand engineering quantum dot light-emitting diode
暂未订购 下载PDF
Enhanced transient photovoltaic characteristics of core–shell ZnSe/ZnS/L-Cys quantum-dot-sensitized TiO_2 thin-film 认领 引用 被引量：1
2
作者 Kui-Ying Li Lun Ren Tong-De Shen 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第6期415-423,共9页
Photoanodic properties greatly determine the overall performance of quantum-dot-sensitized solar cells（QDSCs）. In the present report, the microdynamic behaviors of carriers in the nanocomposite thin-film, a Zn Se QD... Photoanodic properties greatly determine the overall performance of quantum-dot-sensitized solar cells（QDSCs）. In the present report, the microdynamic behaviors of carriers in the nanocomposite thin-film, a Zn Se QD-sensitized mesoporous La-doped nano-TiO2 thin-film, as a potential candidate for photoanode, are probed via nanosecond transient photovoltaic（TPV） spectroscopy. The results confirm that the L-Cys ligand has a dual function serving as a stabilizer and molecular linker. Large quantities of interface states are located at the energy level with a photoelectric threshold of1.58 eV and a quantum well（QW） depth of 0.67 eV. This QW depth is approximately 0.14 eV deeper than the depth of QW buried in the Zn Se QDs, and a deeper QW results in a higher quantum confinement energy. A strong quantum confinement effect of the interface state may be responsible for the excellent TPV characteristics of the photoanode. For example, the peak intensity of the TPV response of the QD-sensitized thin-film lasts a long time, from 9.40 × 10^（-7） s to 2.96 × 10^（-4） s,and the end time of the PTV response of the QD-sensitized thin-film is extended by approximately an order of magnitude compared with those of the TiO2 substrate and the QDs. The TPV characteristics of the QD-sensitized thin-film change from p-type to n-type for the QDs before and after sensitizing. These properties strongly depend on the extended diffusion length of the photogenerated carries and the reduced recombination rate of photogenerated electron-hole pairs, resulting in prolonged carrier lifetime and an increased level of electron injection into the TiO2 thin-film substrate. 展开更多
关键词 sensitization core-shell ZnSe quantum dots mesoporous Ti02 thin-film time-resolution photo- voltage
暂未订购 下载PDF
Rational design of AgGaS/ZnS/ZnS quantum dots with a near-unity photoluminescence quantum yield via double shelling scheme 认领 引用 被引量：2
3
作者 H.X.Lu H.Liu +5 位作者 Z.Z.Fu Y.Y.Chen H.Q.Dai Z.Hu W.L.Zhang R.Q.Guo 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2024年第2期235-242,共8页
In this study,a two-step method was used to synthesize highly luminescent AgGaS/ZnS/ZnS quantum dots(QDs).In the first step,an inner ZnS shell was formed via a one-pot method,which resulted in a smaller lattice mismat... In this study,a two-step method was used to synthesize highly luminescent AgGaS/ZnS/ZnS quantum dots(QDs).In the first step,an inner ZnS shell was formed via a one-pot method,which resulted in a smaller lattice mismatch between the AgGaS core and the outer ZnS shell,thereby facilitating the formation of a thick outer shell.After the two-step shelling process,the synthesized AgGaS/ZnS/ZnS QDs showed an excellent photoluminescence quantum yield(PLQY)of 96.4%with a peak wavelength of 508 nm,repre-senting the highest PLQY reported thus far for AgGaS QDs.Furthermore,the effect of halogen ions in Zn precursors on the shelling process was investigated.It was proposed that the capacity of halogen ions to coordinate with the QDs influenced the balance between Zn cation diffusion and ZnS shelling reaction.Specifically,the ZnS shelling reaction was dominant when ZnCl2was employed,while Zn cation diffusion was the dominant process under the I−-rich environment.This work provides insights into the interfacial restructuring during the ZnS shelling and offers a clear map for the tailored synthesis of core/shell QDs. 展开更多
关键词 AgGaS Quantum dots Photoluminescence Core/shell Alloyed core/shell interface
暂未订购 下载PDF
Copper indium sulfide colloidal quantum dots: Advances in synthesis, structure-optoelectronic properties, and applications 认领 引用 被引量：2
4
作者 Yiming Xia Nilotpal Kapuria +7 位作者 Mingrui He Uma VGhorpade Xinyao Guo Bohan Hao Seung Wook Shin Ziv Hameiri Xiaojing Hao Mahesh P.Suryawanshi 《Advanced Powder Materials》 EI CAS CSCD 2025年第3期12-31,共20页
The discovery of quantum dots(QDs)stands as one of the paramount technological breakthroughs of the 20th century.Their versatility spans from everyday applications to cutting-edge scientific research,encompassing area... The discovery of quantum dots(QDs)stands as one of the paramount technological breakthroughs of the 20th century.Their versatility spans from everyday applications to cutting-edge scientific research,encompassing areas such as displays,lighting,photocatalysis,bio-imaging,and photonics devices and so on.Among the myriad QDs technologies,industrially relevant CuInS2(CIS)QDs have emerged as promising alternatives to traditional Cd-and Pb-based QDs.Their tunable optoelectronic properties,high absorption coefficient,compositional flexibility,remarkable stability as well as Restriction of Hazardous Substances-compliance,with recent trends revealing a renewed interest in this material for various visible and near-infrared technological applications.This review focuses on recent advancements in CIS QDs as multidisciplinary field from its genesis in the mid-1990 to date with an emphasis on key breakthroughs in their synthesis,surface chemistry,post-synthesis modifications,and various applications.First,the comparation of properties of CIS QDs with relevant knowledge from other classes of QDs and from Ⅰ-Ⅱ-Ⅲ semiconductors as well is summarized.Second,recent advances in the synthesis methods,structure-optoelectronic properties,their defects,and passivation strategies as well as CIS-based heterostructures are discussed.Third,the state-of-the-art applications of CIS QDs ranging from solar cells,luminescence solar concentrations,photocatalysis,light emitting diodes,bioimaging and some emerging applications are summarized.Finally,we discuss open challenges and future perspectives for further advancement in this field. 展开更多
关键词 Copper indium sulfide Quantum dots Core/shell Optoelectronic properties Luminescent solar concentrators Photovoltaics Photocatalysis LEDs Bioimaging
暂未订购 下载PDF
Infrared light-emitting diodes based on colloidal Pb Se/Pb S core/shell nanocrystals 认领 引用 被引量：1
5
作者 Byung-Ryool Hyun Mikita Marus +7 位作者 Huaying Zhong Depeng Li Haochen Liu Yue Xie Weon-kyu Koh Bing Xu Yanjun Liu Xiao Wei Sun 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第1期482-488,共7页
Colloidal Pb Se nanocrystals(NCs)have gained considerable attention due to their efficient carrier multiplication and emissions across near-infrared and short-wavelength infrared spectral ranges.However,the fast degra... Colloidal Pb Se nanocrystals(NCs)have gained considerable attention due to their efficient carrier multiplication and emissions across near-infrared and short-wavelength infrared spectral ranges.However,the fast degradation of colloidal Pb Se NCs in ambient conditions hampers their widespread applications in infrared optoelectronics.It is well-known that the inorganic thick-shell over core improves the stability of NCs.Here,we present the synthesis of Pb Se/Pb S core/shell NCs showing wide spectral tunability,in which the molar ratio of lead(Pb)and sulfur(S)precursors,and the concentration of sulfur and Pb Se NCs in solvent have a significant effect on the efficient Pb S shell growth.The infrared light-emitting diodes(IR-LEDs)fabricated with the Pb Se/Pb S core/shell NCs exhibit an external quantum efficiency(EQE)of 1.3%at 1280 nm.The ligand exchange to optimize the distance between NCs and chloride treatment are important processes for achieving high performance on Pb Se/Pb S NC-LEDs.Our results provide evidence for the promising potential of Pb Se/Pb S NCs over the wide range of infrared optoelectronic applications. 展开更多
关键词 Pb Se/Pb S core/shell nanocrystal ligand exchange infrared light-emitting diodes external quantum efficiency
暂未订购 下载PDF
High-brightness and Monodisperse Quaternary CuInZnS@ZnS Quantum Dots with Tunable and Long-lived Emission 认领 引用
6
作者 CHEN Zi ZHANG Aidi +5 位作者 GONG Ke LIU Haihua YU Gang SHAN Qingsong LIU Yong ZENG Haibo 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2025年第4期433-439,I0017-I0021,共7页
As an essential candidate for environment-friendly luminescent quantum dots(QDs),CuInS-based QDs have attracted more attention in recent years.However,several drawbacks still hamper their industrial applications,such ... As an essential candidate for environment-friendly luminescent quantum dots(QDs),CuInS-based QDs have attracted more attention in recent years.However,several drawbacks still hamper their industrial applications,such as lower photoluminescence quantum yield(PLQY),complex synthetic pathways,uncontrollable emission spectra,and insufficient photostability.In this study,CuInZnS@ZnS core/shell QDs was prepared via a one-pothree-step synthetic scheme with accurate and tunable control of PL spectra.Then their ensemble spectroscopic properties during nucleation formation,alloying,and ZnS shell growth processes were systematically investigated.PL peaks of these QDs can be precisely manipulated from 530 to 850 nm by controlling the stoichiometric ratio of Cu/In,Zn2+doping and ZnS shell growth.In particular,CuInZnS@ZnS QDs possess a significantly long emission lifetime(up to 750 ns),high PLQY(up to 85%),and excellent crystallinity.Their spectroscopic evolution is well validated by Cu-deficient related intragap emission model.By controlling the stoichiometric ratio of Cu/In,two distinct Cu-deficient related emission pathways are established based on the differing oxidation states of Cu defects.Therefore,this work provides deeper insights for fabricating high luminescent ternary or quaternary-alloyed QDs. 展开更多
关键词 quantum dot CuInS alloying core/shell ensemble spectroscopic Cu-deficient related emission
暂未订购 下载PDF
多巴胺醌功能化的量子点荧光探针构建及其pH响应研究 认领 引用
7
作者 王政 侯小琪 刘宣勇 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2026年第2期225-233,I0005-I0007,共9页
量子点(Quantum Dots,QDs)凭借其优异的光致发光特性,在生物检测领域展现出重要的应用价值。其中,pH作为调控生理功能的关键参数,其高灵敏度响应具有重要意义。然而,传统pH荧光探针常受限于灵敏度不足或稳定性较差的问题。基于此,本研... 量子点(Quantum Dots,QDs)凭借其优异的光致发光特性,在生物检测领域展现出重要的应用价值。其中,pH作为调控生理功能的关键参数,其高灵敏度响应具有重要意义。然而,传统pH荧光探针常受限于灵敏度不足或稳定性较差的问题。基于此,本研究采用能带工程优化设计,构建CdSe/CdS/ZnS核壳结构QDs,以提高其荧光量子产率和稳定性。进一步通过巯基乙胺(Mercaptoethylamine,MEA)和多巴胺异硫氰酸酯(Dopamine-isothiocyanate,DA-ITC)修饰,制备得到具有高灵敏度pH响应的QDs荧光探针。实验结果表明:氨基化的CdSe/CdS/ZnS QDs具有优异的光学性质。经DA-ITC修饰后,探针表现出高灵敏度的pH响应性能,其响应机制源于碱性条件下表面配体氧化形成的多巴胺醌(Dopamine Quinone,DQ)对QDs的荧光猝灭作用。对于1 nmol QDs,DA-ITC投入量为4~40μgmol时,在pH 5.0~10.0范围内,探针的荧光强度呈现随pH增加而线性降低的趋势(线性拟合常数R2>0.90)。当DA-ITC投入量为20μgmol时,探针的pH响应效果最佳,其线性拟合常数为0.9869。此外,该探针具有良好的细胞相容性,能够有效应用于细胞pH荧光成像监测研究。 展开更多
关键词 量子点 核壳结构 pH响应 氧化还原
暂未订购 下载PDF
CdZnSe基量子点用于高性能纯蓝光量子点发光二极管 认领 引用
8
作者 张晔 李辉 +4 位作者 郭宁 陈彦飙 李天辰 江雷 吴雨辰 《液晶与显示》 CAS CSCD 北大核心 2026年第1期74-83,共10页
量子点发光二极管(Quantum Dot Light Emitting Diodes,QLED)因其窄发射光谱、广色域覆盖、高亮度及低功耗等优势,在高分辨率显示和增强现实等新兴领域展现出广阔应用前景。但蓝色器件的发光效率和稳定性显著落后于红色和绿色器件,这限... 量子点发光二极管(Quantum Dot Light Emitting Diodes,QLED)因其窄发射光谱、广色域覆盖、高亮度及低功耗等优势,在高分辨率显示和增强现实等新兴领域展现出广阔应用前景。但蓝色器件的发光效率和稳定性显著落后于红色和绿色器件,这限制了全彩显示的发展。本研究提出了一种基于ZnSe主体并引入Cd离子调控发射的合成策略,通过在高温条件下快速注入Cd2+实现离子交换,成功制备出发射峰位为469 nm、光致发光量子产率(Photoluminescence Quantum Yield,PLQY)为79%的CdZnSe核量子点(QDs),并在核QDs外进行ZnSe/ZnSeS/ZnS多层壳层外延生长,有效钝化表面缺陷、增强结构稳定性并显著降低非辐射复合速率。结果显示多层壳层后的QDs发射峰稳定在463 nm,PLQY进一步提升至92%,呈现纯蓝色发射;以此构建的QLED器件峰值外量子效率达到18.5%,最高亮度达到6.34×104cd/m2。该策略通过离子交换与多层壳层钝化的协同作用,实现了纯蓝区QDs的高PLQY、稳定发射的高性能QLED器件,为深蓝区QDs的高效制备提供了有效方法。 展开更多
关键词 量子点发光二极管 纯蓝光发射 离子交换 核/壳结构
暂未订购 下载PDF
组分无序对Ga2O3/(AlxGa1-x)2O3核/壳量子盘中界面类氢杂质光电离截面的影响 认领 引用
9
作者 杨昊 哈斯花 朱俊 《人工晶体学报》 CAS 北大核心 2026年第2期223-232,共10页
本文提出了一种新型核/壳量子盘结构,其核层和壳层由第四代超宽带隙半导体Ga2O3和(AlxGa1-x)2O3组成,通过结合有限差分法与变分法,研究该核/壳量子盘结构中杂质基态与非束缚态之间,以及不同杂质束缚态之间的光学子带... 本文提出了一种新型核/壳量子盘结构,其核层和壳层由第四代超宽带隙半导体Ga2O3和(AlxGa1-x)2O3组成,通过结合有限差分法与变分法,研究该核/壳量子盘结构中杂质基态与非束缚态之间,以及不同杂质束缚态之间的光学子带间跃迁及其对应的光电离截面。采用数值计算,首次考虑了Al组分无序的相关影响。结果表明,组分无序效应对杂质基态向非束缚态跃迁对应的光电离截面影响可忽略不计。相比之下,组分无序引起的随机势涨落,使不同杂质束缚态之间的跃迁光电离截面在共振峰处表现出显著变化。这些发现可为进一步探索基于超宽带隙材料的光子学和光电设备的应用提供理论指导。 展开更多
关键词 Ga2O3 核/壳量子盘 组分无序 光电离截面 结合能 波函数
暂未订购 下载PDF
蓝光ZnSeTe量子点的可控制备及其量子点发光二极管器件研究进展 认领 引用
10
作者 费文龙 王亚坤 廖良生 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2026年第7期867-882,共16页
胶体量子点(QDs)因其发射波长可调、色纯度高及溶液可加工性等独特优势,成为光电器件领域理想的发光材料。量子点发光二极管(QLED)作为有机发光二极管重要的技术补充,在显示领域展现出良好的应用前景。然而,传统镉/铅(Cd/Pb)基QDs存在... 胶体量子点(QDs)因其发射波长可调、色纯度高及溶液可加工性等独特优势,成为光电器件领域理想的发光材料。量子点发光二极管(QLED)作为有机发光二极管重要的技术补充,在显示领域展现出良好的应用前景。然而,传统镉/铅(Cd/Pb)基QDs存在毒性问题,推动了无重金属QDs体系的发展。当前,无重金属蓝光QLED在器件效率与稳定性方面仍显著落后于红、绿光器件,成为制约其应用的关键瓶颈。针对这一问题,ZnSeTe QDs因其可调带隙及优异的蓝光发射特性受到广泛关注。本文围绕ZnSeTe QDs展开综述,首先介绍了其成核、生长机制及典型合成方法,并重点分析了影响其光学性能的关键因素。在此基础上,系统总结了多种性能优化策略,包括能带工程、表面刻蚀、壳层钝化以及配体调控等。接着,简要阐述了QLED的电致发光机制,并总结了ZnSeTe QDs在蓝光器件中的最新研究进展。最后,针对当前存在的发光效率低、器件寿命短及电荷注入不平衡等问题,对未来发展方向进行了展望。 展开更多
关键词 蓝光量子点 量子点发光二极管 ZnSeTe 核壳工程 配体工程 综述
暂未订购 下载PDF
贵金属量子点在光催化领域中的作用原理与应用 认领 引用
11
作者 杨铠源 《信息记录材料》 2026年第1期8-10,13,共3页
贵金属量子点具有独特的光电性能,在光催化领域展现出重要的应用价值。本文系统梳理了贵金属量子点的作用机制,重点探讨了其在光催化过程中的电子转移、表面等离子体共振(SPR)效应及异质结构建等关键作用原理,通过对游离型、贵金属硫族... 贵金属量子点具有独特的光电性能,在光催化领域展现出重要的应用价值。本文系统梳理了贵金属量子点的作用机制,重点探讨了其在光催化过程中的电子转移、表面等离子体共振(SPR)效应及异质结构建等关键作用原理,通过对游离型、贵金属硫族化合物型及核壳型3类量子点的性能比较与应用研究发现:游离型量子点通过表面沉积可有效促进载流子分离;贵金属硫族化合物凭借其窄带隙特性和近红外特性在污染物降解与杀菌领域表现优异,但其荧光量子产率(PLQY)需通过氯化物钝化等策略提升;核壳型结构虽能协同增强稳定性与催化活性,但不当的壳层设计可能加剧载流子复合并降低催化性能。当前挑战集中于成本控制、稳定性提升及PLQY优化,未来可通过贵金属-非贵金属复合体系开发,拓展其在医疗、食品工业等敏感领域的应用。本文为贵金属量子点的理性设计提供了理论参考与技术展望。 展开更多
关键词 贵金属量子点 光催化 硫族化合物量子点 核壳结构 量子产率
暂未订购 下载PDF
Enhancing white light-emitting diode performance with an ultra-wide spectrum ZnS:Mn-CDs@SiO2dual core@shell composite 认领 引用 被引量：1
12
作者 Haijiang Qiu Song Yang +4 位作者 Min Li Haixin Chen Yongqi Zhang Xin Chen Yuanhui Zheng 《Inorganic Chemistry Frontiers》 SCIE EI CAS CSCD 2025年第2期637-646,共10页
Recent progress in the field of carbon dots(CDs)has highlighted their significant potential,attributed to their exceptional optical properties and diverse applications,most notably in the realm of white lightemitting ... Recent progress in the field of carbon dots(CDs)has highlighted their significant potential,attributed to their exceptional optical properties and diverse applications,most notably in the realm of white lightemitting diodes(WLEDs).CDs are recognized for their broad spectrum of emission,adjustable fluorescence,and excellent thermal stability,making them ideal candidates for use in WLEDs.However,the challenge lies in synthesizing CDs that can emit long-wavelength,multicolor light from a single host material.This research presents a highly efficient dual-core-shell structured white-emitting phosphor,denoted as ZnS:Mn-CDs@SiO2,which has achieved an impressive photoluminescence quantum yield(PLQY)of 25.8%and an expansive full width at half maximum(FWHM)of 131 nm.The successful implementation of this novel material has led to the creation of WLEDs with Commission Internationale de l’Eclairage(CIE)coordinates at(0.32,0.38)and a correlated color temperature(CCT)of 5854.3 K,marking a significant stride in the development of high-performance WLEDs. 展开更多
关键词 ultra wide spectrum photoluminescence quantum yield CIE coordinates carbon dots cds white light emitting diodes ZnS Mn CDS SiO dual core shell composite full width half maximum carbon dots
阳离子交换法可控制备CdS@PbS核壳量子点及其近红外探测器性能 认领 引用 被引量：1
13
作者 李小丽 李艳莉 李冬 《应用化学》 CAS CSCD 北大核心 2025年第8期1078-1086,共9页
在N,N-二甲基甲酰胺(DMF)溶剂中通过阳离子交换策略,将CdS量子点转变成具有近红外吸收能力的CdS@PbS核壳量子点。通过透射电子显微镜(TEM)、X射线粉末衍射仪(XRD)和紫外-可见-近红外分光光度计(UV-Vis-NIR)对CdS@PbS核壳量子点的形貌、... 在N,N-二甲基甲酰胺(DMF)溶剂中通过阳离子交换策略,将CdS量子点转变成具有近红外吸收能力的CdS@PbS核壳量子点。通过透射电子显微镜(TEM)、X射线粉末衍射仪(XRD)和紫外-可见-近红外分光光度计(UV-Vis-NIR)对CdS@PbS核壳量子点的形貌、元素组成、晶体结构和光学性质进行了表征。得益于该核壳量子点独特的近红外吸收特色,CdS@PbS核壳量子点被作为光活性层成功构建了自供能光电化学型近红外探测器。研究发现,在近红外光(即850 nm波长光)照射下,基于CdS@PbS核壳量子点的自供能光电化学型探测器的开关比达到2277,响应度为83.29 mA/W和比探测率为2.91×1011Jones。值得注意的是,该探测器还展现了其光电流与入射光强具有良好的线性关系,表明该器件对不同强度的850 nm近红外光均能实现稳定的探测。 展开更多
关键词 近红外探测器 自供能 CdS@PbS核壳量子点 阳离子交换法
暂未订购 下载PDF
Pure-blue emissive ZnSe/CdxZn1-xS/ZnS quantum dots with type-II core-shell structure for display application 认领 引用 被引量：2
14
作者 Mingrui Liu Chenhui Wang +3 位作者 Peng Huang Jinhua He Muhammad Ramzan Haizheng Zhong 《Nano Research》 SCIE EI CSCD 2024年第12期10476-10482,共7页
Blue emissive quantum dots are key materials in fabricating quantum-dot light-emitting diodes for display applications.Up to date,most of the previous blue emissive quantum dots are based on quantum dots with type-I c... Blue emissive quantum dots are key materials in fabricating quantum-dot light-emitting diodes for display applications.Up to date,most of the previous blue emissive quantum dots are based on quantum dots with type-I core-shell structure.In this work,we report pure-blue emissive ZnSe/CdxZn1-xS/ZnS quantum dots with type-II core-shell structure,which show high photoluminescence quantum yield over 90%.The type-II structure was investigated by applying time-resolved photoluminescence and transient absorption measurements,illustrating the extended photoluminescence decay lifetime of ZnSe/CdxZn1-xS quantum dots as well as the transition of bleaching peak from the valence band of ZnSe to the conduction band of CdZnS.We further fabricated ZnSe/CdxZn1-xS/ZnS quantum dots based electroluminescence devices,achieving a maximum external quantum efficiency of 6.7%and a maximum luminance of 39,766 cd·m-2. 展开更多
关键词 quantum dots blue emitter type-II display core shell
暂未订购 下载PDF
One-pot/three-step synthesis of zinc-blende CdSe/CdS core/shell nanocrystals with thick shells 认领 引用 被引量：5
15
作者 Yuan Niu Chaodan Pu +4 位作者 Runchen Lai Renyang Meng Wanzhen Lin Haiyan Qin Xiaogang Peng 《Nano Research》 SCIE EI CSCD 2017年第4期1149-1162,共14页
A one-pothree-step synthetic scheme was developed for phase-pure epitaxy of CdS shells on zinc-blende CdSe nanocrystals to yield shells with up to sixteen monolayers.The key parameters for the epitaxy were identified,... A one-pothree-step synthetic scheme was developed for phase-pure epitaxy of CdS shells on zinc-blende CdSe nanocrystals to yield shells with up to sixteen monolayers.The key parameters for the epitaxy were identified,including the core nanocrystal concentration,solvent type/composition,quality of the core nanocrystals,epitaxial growth temperature,type/concentration of ligands,and composition of the precursors.Most of these key parameters were not influential when the synthetic goal was thin-shell CdSe/CdS core/shell nanocrystals.The finalized synthetic scheme was reproducible at an almost quantitative level in terms of the crystal structure,shell thickness,and optical properties. 展开更多
关键词 zinc-blende core/shell quantum dots thick shells
暂未订购 下载PDF
核/壳型CdTe@SiO_2荧光纳米复合粒子的制备与表征 认领 引用 被引量：16
16
作者 尤晓刚 贺蓉 +3 位作者 高峰 邵君 潘碧峰 崔大祥 《化学学报》 SCIE CAS 北大核心 2007年第6期561-565,共5页
利用反相微乳法,以巯基乙酸修饰的水溶性CdTe量子点为核,包覆SiO2,制备得到核壳型CdTe@SiO2荧光纳米复合粒子.用紫外-可见(UV-vis)分光光度计,荧光(PL)分光光度计,红外(FT-IR)光谱仪,透射电子显微镜(TEM)等分析测试手段,对得到的荧光纳... 利用反相微乳法,以巯基乙酸修饰的水溶性CdTe量子点为核,包覆SiO2,制备得到核壳型CdTe@SiO2荧光纳米复合粒子.用紫外-可见(UV-vis)分光光度计,荧光(PL)分光光度计,红外(FT-IR)光谱仪,透射电子显微镜(TEM)等分析测试手段,对得到的荧光纳米复合粒子的性能进行表征,结果表明:得到的CdTe@SiO2纳米复合粒子是核壳型结构,由SiO2壳层包覆多个量子点,其大小均匀,水溶性好,有效地提高了量子点的稳定性,大大增强了其抗光漂白性能,为该材料的进一步生物应用打下了良好的基础. 展开更多
关键词 量子点 纳米复合粒子 核壳结构 光漂白
暂未订购 下载PDF
CdTe/CdS核壳量子点与蛋白质荧光标记 认领 引用 被引量：21
17
作者 曾庆辉 张友林 +4 位作者 杜创 宋凯 孙雅娟 刘晓敏 孔祥贵 《高等学校化学学报》 SCIE CAS 北大核心 2009年第6期1158-1161,共4页
利用连续离子层吸附技术合成了水溶性的CdTe/CdS核壳量子点.通过CdS壳层的包覆,量子点的量子效率由原来的15%(裸核)提高到38%(核壳),这种核壳结构量子点的化学和光学性质具有更好的稳定性,可以用于生物标记.本文采取共价连接与静电吸附... 利用连续离子层吸附技术合成了水溶性的CdTe/CdS核壳量子点.通过CdS壳层的包覆,量子点的量子效率由原来的15%(裸核)提高到38%(核壳),这种核壳结构量子点的化学和光学性质具有更好的稳定性,可以用于生物标记.本文采取共价连接与静电吸附两种方法,实现了量子点的生物标记,电泳技术已证明,应用这种量子点成功地实现了对蛋白质分子的生物标记.通过对量子点与蛋白质偶联前后的荧光光谱分析,发现量子点与蛋白质作用后荧光增强是由于蛋白质对量子点进行了表面修饰,从而降低了表面缺陷引起的非辐射跃迁几率所致.通过共价连接量子点的荧光峰位红移,主要是由于偶极-偶极相互作用引起的;量子点与蛋白质静电吸附作用引起的荧光峰位蓝移主要起因于量子点表面电荷量的降低. 展开更多
关键词 CdTe/CdS 核壳量子点 荧光增强 红移 蓝移
暂未订购 下载PDF
谷胱甘肽稳定水溶性CdTe/ZnTe量子点的制备与表征 认领 引用 被引量：6
18
作者 徐昕 孔毅飞 +2 位作者 贺蓉 吉佳佳 崔大祥 《化学学报》 SCIE CAS CSCD 北大核心 2011年第8期931-936,共6页
用还原型谷胱甘肽(GSH)作为稳定剂,合成了水溶性的CdTe/ZnTe核壳结构的半导体量子点.考察了Zn/Cd反应物配比及GSH用量对CdTe/ZnTe量子点的性能影响.用高分辨透射电子显微镜(HRTEM)和X射线粉末衍射(XRD)光谱对CdTe和CdTe/ZnTe的形貌和晶... 用还原型谷胱甘肽(GSH)作为稳定剂,合成了水溶性的CdTe/ZnTe核壳结构的半导体量子点.考察了Zn/Cd反应物配比及GSH用量对CdTe/ZnTe量子点的性能影响.用高分辨透射电子显微镜(HRTEM)和X射线粉末衍射(XRD)光谱对CdTe和CdTe/ZnTe的形貌和晶体结构进行了表征.荧光光谱结果表明,核壳结构的CdTe/ZnTe量子点比单一的CdTe量子点具有更高的荧光量子产率和更好的光活化性能. 展开更多
关键词 合成 谷胱甘肽 量子点 核壳
暂未订购 下载PDF
核壳型ZnS∶Cu/ZnS量子点的制备及发光性质 认领 引用 被引量：9
19
作者 田昕 曹立新 +2 位作者 柳伟 苏革 董博华 《发光学报》 EI CAS CSCD 北大核心 2012年第7期736-741,共6页
本文采用水相合成方法制备了ZnS∶Cu量子点并进行了ZnS壳层修饰,研究了壳层厚度对ZnS∶Cu量子点光学性质的影响,采用TEM、XRD、PL、PLE和UV-Vis等测试方法对其进行了表征。实验结果表明,合成的ZnS∶Cu/ZnS量子点为立方闪锌矿,尺寸分布... 本文采用水相合成方法制备了ZnS∶Cu量子点并进行了ZnS壳层修饰,研究了壳层厚度对ZnS∶Cu量子点光学性质的影响,采用TEM、XRD、PL、PLE和UV-Vis等测试方法对其进行了表征。实验结果表明,合成的ZnS∶Cu/ZnS量子点为立方闪锌矿,尺寸分布均匀呈球形,分散性良好,经过壳层修饰平均粒径由2 nm增加到3.2 nm。随着ZnS壳与ZnS核量的比的增加,量子点的PLE激发峰位置和UV-Vis吸收谱线出现红移,也说明了量子点的尺寸增大,证明ZnS在ZnS∶Cu量子点的表面生长,形成了核壳结构的ZnS∶Cu/ZnS量子点。随着壳层增厚,量子点与铜离子发光中心相关的发射峰强度先增大后减小,当壳核比nsc=2.5时,发光强度达到最大。 展开更多
关键词 量子点 ZnS∶Cu 核壳结构 发光
暂未订购 下载PDF
微波辅助快速合成水溶性CdTe/CdSe核壳量子点 认领 引用 被引量：10
20
作者 徐昕 贺蓉 崔大祥 《功能材料》 EI CAS CSCD 北大核心 2011年第4期659-662,667,共4页
以巯基乙酸(TGA)作为稳定剂,用微波辅助法快速合成了水溶性CdTe/CdSe核壳量子点。比较了传统水热法和微波辅助法制备的量子点性能,研究了加热温度、反应物配比及CdTe量子点浓度对CdTe/CdSe核壳量子点的性能影响。研究结果表明,核壳结构... 以巯基乙酸(TGA)作为稳定剂,用微波辅助法快速合成了水溶性CdTe/CdSe核壳量子点。比较了传统水热法和微波辅助法制备的量子点性能,研究了加热温度、反应物配比及CdTe量子点浓度对CdTe/CdSe核壳量子点的性能影响。研究结果表明,核壳结构的CdTe/CdSe量子点比单一的CdTe量子点具有更优异的光致发光强度和光稳定性。 展开更多
关键词 水溶性 量子点 微波 核壳
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 6 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈