Microemulsion‐Induced Stable CsPbBr3/PbWO4 Nanocrystals for Light‐Emitting Diodes

Xue-Chen Ru; Ji-Song Yao; Jun-Nan Yang; Jing Ge; Yi-Feng Lan; Tian Chen; Zhen-Yu Ma; Yi-Chen Yin; Jing-Jing Wang; Yong-Hui Song; Li-Zhe Feng; Kuang-Hui Song; Hong-Bin Yao

doi:10.1002/adpr.202100250

Advanced Photonics Research (Jan 2022)

Microemulsion‐Induced Stable CsPbBr3/PbWO4 Nanocrystals for Light‐Emitting Diodes

Xue-Chen Ru,
Ji-Song Yao,
Jun-Nan Yang,
Jing Ge,
Yi-Feng Lan,
Tian Chen,
Zhen-Yu Ma,
Yi-Chen Yin,
Jing-Jing Wang,
Yong-Hui Song,
Li-Zhe Feng,
Kuang-Hui Song,
Hong-Bin Yao

Affiliations

Xue-Chen Ru: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China
Ji-Song Yao: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China
Jun-Nan Yang: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China
Jing Ge: Department of Chemical Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei Anhui 230026 China
Yi-Feng Lan: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China
Tian Chen: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China
Zhen-Yu Ma: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China
Yi-Chen Yin: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China
Jing-Jing Wang: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China
Yong-Hui Song: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China
Li-Zhe Feng: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China
Kuang-Hui Song: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China
Hong-Bin Yao: Hefei National Research Center for Physical Sciences at the Microscale, Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences University of Science and Technology of China Hefei Anhui 230026 China

DOI: https://doi.org/10.1002/adpr.202100250
Journal volume & issue: Vol. 3, no. 1
pp. n/a – n/a

Abstract

Read online

All‐inorganic cesium lead halide perovskite colloidal nanocrystals (NCs) (CsPbX3, X = Cl, Br, I) have emerged as potential candidates for next‐generation light‐emitting diodes (LEDs). However, high trap states on the surface of CsPbX3 NCs caused by ionic nature and dynamic bonding of organic ligands limit the performance of CsPbX3 NCs‐based LEDs. Herein, a microemulsion (ME)‐modified strategy to decorate CsPbBr3 NC cores with inorganic PbWO4 is developed. It is demonstrated that ME‐assisted modification plays a crucial role in bridging the WO42− anion solution and the CsPbBr3 NC suspension. Compared with pristine CsPbBr3 NCs, the obtained PbWO4‐modified NCs exhibit improved photoluminescence efficiency. The corresponding NC films also show enhanced stability at elevated temperature and also in humid atmosphere. Consequently, the PbWO4‐modified NCs‐based LED exhibits a pronounced improvement of electroluminescence with an external quantum efficiency from 0.2% to 5.7% and twofold enhancement of the operational lifetime through PbWO4 passivation in comparison with that of pristine CsPbBr3 NCs‐based LED. These results show a promising pathway by ME‐induced anionic modification for high‐performance and stable LEDs based on perovskite NCs.

Published in Advanced Photonics Research

ISSN: 2699-9293 (Online)
Publisher: Wiley-VCH
Country of publisher: Germany
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: https://onlinelibrary.wiley.com/journal/26999293

About the journal

Abstract

Keywords