All-solution-processed CsPbBr3 perovskite quantum dot light-emitting diodes passivated by phenylethylammonium bromide salt

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-02-15 DOI:10.1016/j.optmat.2025.116815

Jiaqi Wu , Yinfeng Zhang , Xinyi Wu , Ziying Wen , Sheng Cheng , Jun Zhu

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引用次数: 0

Abstract

All-inorganic CsPbBr₃ perovskite quantum dots have wide application in the field of light-emitting diodes due to their excellent optoelectronic properties (such as high color purity, high photoluminescence quantum yield and solution processability, etc.). However, the performance of CsPbBr₃ quantum dot light-emitting diodes is often hindered by the long-chain (oleic acid and oleylamine) insulating ligands on the surface of quantum dots. Herein, we introduce a solid-phase ligand exchange method to ameliorate the performance of perovskite quantum dot light-emitting diodes by passivating CsPbBr₃ quantum dot films with phenylethylammonium bromide. As a result, the introduction of phenylethylammonium bromide effectively removes the long-chain ligands on the surface of quantum dot films, and passivates the bromide vacancy defects. Furthermore, the maximum luminance and external quantum efficiency of the all-solution-processed device increase from 570 cd m⁻² to 0.09 % to 1807 cd m⁻² and 0.27 %, respectively. This work provides a simple and feasible method for the development of low-cost all-solution-processed perovskite quantum dot light-emitting diodes.

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.