Blue Perovskite Quantum Dot Co-doped with Rb<sup>+</sup>/Zn<sup>2+</sup> and Its Light Emitting Diodes

XIAO Yi; LI Dan-yang; LUO Yu; WANG Jun-jie; LIU Sen-kun; ZHANG Yu-ling; PENG Jun-biao

doi:10.37188/CJL.20220097

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Blue Perovskite Quantum Dot Co-doped with Rb⁺/Zn²⁺ and Its Light Emitting Diodes

Device Fabrication and Physics | 更新时间：2022-10-19

- Blue Perovskite Quantum Dot Co-doped with Rb⁺/Zn²⁺ and Its Light Emitting Diodes
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 6, Pages: 901-910(2022)
- 作者机构：
  
  华南理工大学发光材料与器件国家重点实验室，广东广州　510641
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(62074059);Science and Technology Project of Guangdong Province(2019B030302007;2019B010934001)
- DOI：10.37188/CJL.20220097
  CLC： TN312.8;O482.31
- Published：05 June 2022，
  
  Received：22 March 2022，
  
  Revised：08 April 2022，
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肖毅,李丹阳,罗宇等.共掺Rb⁺和Zn²⁺蓝光钙钛矿量子点及其发光二极管[J].发光学报,2022,43(06):901-910.

XIAO Yi,LI Dan-yang,LUO Yu,et al.Blue Perovskite Quantum Dot Co-doped with Rb⁺/Zn²⁺ and Its Light Emitting Diodes[J].Chinese Journal of Luminescence,2022,43(06):901-910.
肖毅,李丹阳,罗宇等.共掺Rb⁺和Zn²⁺蓝光钙钛矿量子点及其发光二极管[J].发光学报,2022,43(06):901-910. DOI： 10.37188/CJL.20220097.

XIAO Yi,LI Dan-yang,LUO Yu,et al.Blue Perovskite Quantum Dot Co-doped with Rb⁺/Zn²⁺ and Its Light Emitting Diodes[J].Chinese Journal of Luminescence,2022,43(06):901-910. DOI： 10.37188/CJL.20220097.

摘要

共掺Rb

、Zn

得到了（Cs

0.8

0.2

）（Pb

0.93

0.07

）（Br

1.8

1.2

）蓝光钙钛矿量子点。相比未掺杂的CsPb（Br

1.8

1.2

）量子点，Rb

、Zn

与卤素离子（Br

、Cl

）形成更加稳定的钙钛矿八面体晶型，抑制了Cl

空位缺陷的形成，提高了量子点的稳定性。掺杂后的量子点溶液光致发光效率从未掺杂的5%显著提高到52%，同时辐射复合也得到了显著增强。Rb

、Zn

共掺使量子点的HOMO能级上移0.31 eV，降低了从空穴传输层（HTL）到发光层（EML）的注入势垒，有利于空穴注入。基于Rb

、Zn

共掺的蓝光钙钛矿量子点，设计了结构为ITO/PEDOT∶PSS/TFB/Pe⁃QDs/TPBi/LiF/Al的发光二极管器件，得到发光峰位于470 nm、半峰宽为19 nm的蓝光发射，最大外量子效率（EQE

max

）达到3.55%。

Abstract

（Cs

0.8

0.2

）（Pb

0.93

0.07

）（Br

1.8

1.2

） blue light perovskite quantum dots were obtained by co-doping Rb

and Zn

. Compared with undoped CsPb（Br

1.8

1.2

） quantum dots， Rb

， Zn

and halogen ions （Br

， Cl

） form a more stable perovskite octahedral crystal， which inhibits the formation of Cl

vacancy defects， which improves the stability of quantum dots. The photoluminescence efficiency of the doped quantum dot solution was significantly improved from the undoped 5% to 52%， and the radiative recombination was also significantly enhanced. The co-doping of Rb

and Zn

shifts the HOMO level of the quantum dots up by 0.31 eV， which reduces the injection barrier from the hole transport layer （HTL） to the emissive layer （EML）， which is beneficial to hole injection. Based on blue perovskite quantum dots co-doped with Rb

and Zn

， a light-emitting device with the structure of ITO/PEDOT∶PSS/TFB/Pe-QDs/TPBi/LiF/Al was designed. For blue light emission at 19 nm， the maximum external quantum efficiency（EQE

max

） reaches 3.55%.

关键词

钙钛矿量子点蓝光发射Rb+、Zn2+掺杂晶格适配

Keywords

perovskite quantum dotsblue emissionRb+， Zn2+ dopinglattice adaptation

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⁰

Blue Perovskite Quantum Dot Co-doped with Rb+/Zn2+ and Its Light Emitting Diodes

DOI：10.37188/CJL.20220097

摘要

Abstract

关键词

Keywords

references

Blue Perovskite Quantum Dot Co-doped with Rb⁺/Zn²⁺ and Its Light Emitting Diodes