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首页> 外文期刊>Advanced Functional Materials >Localized Surface Plasmon Enhanced All-Inorganic Perovskite Quantum Dot Light-Emitting Diodes Based on Coaxial Core/Shell Heterojunction Architecture
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Localized Surface Plasmon Enhanced All-Inorganic Perovskite Quantum Dot Light-Emitting Diodes Based on Coaxial Core/Shell Heterojunction Architecture

机译：基于同轴核/壳异质结架构的局域表面等离激元增强的全无机钙钛矿量子点发光二极管

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摘要

This work presents a strategy of combining the concepts of localized surface plasmons (LSPs) and core/shell nanostructure configuration in a single perovskite light-emitting diode (PeLED) to addresses simultaneously the emission efficiency and stability issues facing current PeLEDs' challenges. Wide bandgap n-ZnO nanowires and p-NiO are employed as the carrier injectors, and also the bottom/upper protection layers to construct coaxial core/shell heterostructured CsPbBr3 quantum dots LEDs. Through embedding plasmonic Au nanoparticles into the device and thickness optimization of the MgZnO spacer layer, an emission enhancement ratio of 1.55 is achieved. The best-performing plasmonic PeLED reaches up a luminance of 10206 cd m(-2), an external quantum efficiency of approximate to 4.626%, and a current efficiency of 8.736 cd A(-1). The underlying mechanisms for electroluminescence enhancement are associated with the increased spontaneous emission rate and improved internal quantum efficiency induced by exciton-LSP coupling. More importantly, the proposed PeLEDs, even without encapsulation, present a substantially improved operation stability against water and oxygen degradation (30-day storage in air ambient, 85% humidity) compared with any previous reports. It is believed that the experimental results obtained will provide an effective strategy to enhance the performance of PeLEDs, which may push forward the application of such kind of LEDs.
机译：这项工作提出了一种在单个钙钛矿发光二极管（PeLED）中结合局部表面等离子体激元（LSPs）和核/壳纳米结构配置概念的策略，以同时解决当前PeLED面临的挑战的发射效率和稳定性问题。宽带隙n-ZnO纳米线和p-NiO被用作载流子注入器，底部/上部保护层也被用来构造同轴的核/壳异质结构CsPbBr3量子点LED。通过将等离子Au纳米粒子嵌入器件并优化MgZnO间隔层的厚度，可以实现1.55的发射增强比。表现最佳的等离激元PeLED达到10206 cd m（-2）的亮度，约4.626％的外部量子效率和8.736 cd A（-1）的电流效率。电致发光增强的基本机制与激子-LSP耦合引起的自发发射速率的提高和内部量子效率的提高有关。更重要的是，与任何以前的报告相比，即使没有封装，提出的PeLED仍具有显着改善的抗水和氧降解的操作稳定性（在空气中储存30天，湿度为85％）。相信获得的实验结果将提供增强PeLED的性能的有效策略，这可能会推动这种LED的应用。

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  • 来源
    《Advanced Functional Materials》 |2018年第20期|1707031.1-1707031.11|共11页
  • 作者

    Shi Zhifeng; Li Ying; Li Sen; Li Xinjian; Wu Di; Xu Tingting; Tian Yongtao; Chen Yongsheng; Zhang Yuantao; Zhang Baolin; Shan Chongxin; Du Guotong;

  • 作者单位

    Zhengzhou Univ, Dept Phys & Engn, Minist Educ, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China;

    Zhengzhou Univ, Dept Phys & Engn, Minist Educ, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China;

    Zhengzhou Univ, Dept Phys & Engn, Minist Educ, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China;

    Zhengzhou Univ, Dept Phys & Engn, Minist Educ, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China;

    Zhengzhou Univ, Dept Phys & Engn, Minist Educ, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China;

    Zhengzhou Univ, Dept Phys & Engn, Minist Educ, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China;

    Zhengzhou Univ, Dept Phys & Engn, Minist Educ, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China;

    Zhengzhou Univ, Dept Phys & Engn, Minist Educ, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China;

    Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Qianjin St 2699, Changchun 130012, Jilin, Peoples R China;

    Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Qianjin St 2699, Changchun 130012, Jilin, Peoples R China;

    Zhengzhou Univ, Dept Phys & Engn, Minist Educ, Key Lab Mat Phys, Zhengzhou 450052, Henan, Peoples R China;

    Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Qianjin St 2699, Changchun 130012, Jilin, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    core/shell architectures; light-emitting diodes; perovskite; plasmonic nanoparticles; stability;

    机译：核/壳结构;发光二极管;钙钛矿;等离子体纳米颗粒;稳定性;

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