Quasi-two-dimensional Blue Perovskite Light-emitting Diodes Based on Phase Modulation

ZHANG Zhiqing; LUO Zhongming; ZHU Mingchao; LAN Xi; SHAO Zhiliang; YE Fanghao; LI Guijun

doi:10.37188/CJL.20230004

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Quasi-two-dimensional Blue Perovskite Light-emitting Diodes Based on Phase Modulation

Device Fabrication and Physics | 更新时间：2023-10-27

- Quasi-two-dimensional Blue Perovskite Light-emitting Diodes Based on Phase Modulation
  增强出版
- Chinese Journal of Luminescence Vol. 44, Issue 6, Pages: 1013-1022(2023)
- 作者机构：
  
  深圳大学物理与光电工程学院，广东深圳　518060
- 作者简介：
- 基金信息：
  
  The Science and Technology Program of Shenzhen(SGDX20201103095607022;JCYJ20210324095003011)
- DOI：10.37188/CJL.20230004
  CLC： TN312.8
- Published：05 June 2023，
  
  Received：10 January 2023，
  
  Revised：03 February 2023，
- 稿件说明：
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张志清,罗忠明,朱明超等.基于维度调制的准二维蓝色钙钛矿发光二极管[J].发光学报,2023,44(06):1013-1022.

ZHANG Zhiqing,LUO Zhongming,ZHU Mingchao,et al.Quasi-two-dimensional Blue Perovskite Light-emitting Diodes Based on Phase Modulation[J].Chinese Journal of Luminescence,2023,44(06):1013-1022.
张志清,罗忠明,朱明超等.基于维度调制的准二维蓝色钙钛矿发光二极管[J].发光学报,2023,44(06):1013-1022. DOI： 10.37188/CJL.20230004.

ZHANG Zhiqing,LUO Zhongming,ZHU Mingchao,et al.Quasi-two-dimensional Blue Perovskite Light-emitting Diodes Based on Phase Modulation[J].Chinese Journal of Luminescence,2023,44(06):1013-1022. DOI： 10.37188/CJL.20230004.

摘要

金属卤化物钙钛矿（MHP）作为一种新兴的半导体材料，目前已在光电应用中表现出优异的性能。其中，基于MHP的发光二极管（PeLED）发展迅猛，红光和绿光器件的效率已达到商用水平。然而，蓝光PeLED 的效率还远落后于红、绿光器件，这在很大程度上阻碍了 PeLED 在全彩显示领域中的应用。本文通过调节混合卤素阴离子的比例以及准二维钙钛矿组分来实现基于维度调制的准二维蓝色PeLED制备。首先，我们采用在 CsPbBr

∶PEABr 准二维钙钛矿中添加苯乙基氯化胺（PEACl）逐步替换苯乙基溴化胺（PEABr），实现了发光峰从502 nm到476 nm的可调制发射。然而，随着PEACl的增加，薄膜中的缺陷及

= 1低维相逐渐增多，导致器件效率降低。我们将溴化胍（GABr）引入到CsPbBr

∶PEACl 准二维钙钛矿中，

= 1低维相得到了显著的抑制，这有利于激子能量的转移，最终蓝光范围内准二维PeLED性能得到了显著提升。本工作为实现高效蓝光 PeLED 提供了新的思路。

Abstract

As a new semiconductor material， metal halide perovskite （MHP） has shown excellent performance in photoelectric applications. Among them， MHP based light emitting diodes （PeLEDs） have developed rapidly， and the efficiency of red and green light devices has reached the commercial level. However， the efficiency of blue PeLED still lags far behind the counterparts， which largely hinders the application of PeLED in the field of full color display. In this paper， the blue-color quasi two-dimensional PeLED based on dimensional modulation is prepared by adjusting the proportion of mixed halogen anions and the composition of quasi two-dimensional perovskite. Firstly， we used the addition of phenylethylamine chloride （PEACl） to CsPbBr

∶PEABr quasi two-dimensional perovskite to gradually replace phenylethylamine bromide （PEABr）， and realized the modulated emission peak from 502 nm to 476 nm. However， with the increase of PEACl， the defects and

= 1 low-dimensional phase in thin films gradually increase， leading to a decrease of device efficiency. We introduced guanidine bromide （GABr） into CsPbBr

∶PEACl blue quasi-two-dimensional perovskite， and the

= 1 low-dimensional phase was significantly inhibited， which was conducive to exciton energy transfer， and finally the performance of quasi-two-dimensional PeLED was significantly improved in the range of blue light. This work provides a new approach for realizing efficient blue PeLED.

关键词

钙钛矿发光二极管维度调制蓝光PEACl掺杂GABr掺杂

Keywords

perovskite light-emitting diodephase modulationblue emissionPEACl dopingGABr doping

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