Stabilization of CsPbBr₃ Nanocrystals via Defect Passivation and Alumina Encapsulation for High-Power Light-Emitting Diodes

Min Wang; Zhiyong Lei; Chun Du; Yanwei Wen; Bin Shan; Kun Cao; Rong Chen

doi:10.1021/acsanm.2c04974

journal article·2023-04-28

Stabilization of CsPbBr₃ Nanocrystals via Defect Passivation and Alumina Encapsulation for High-Power Light-Emitting Diodes

Min Wang, Zhiyong Lei, Chun Du, Yanwei Wen, Bin Shan, Kun Cao, Rong Chen

ACS Applied Nano Materials· Volume 6· Issue 8

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Source abstract

Abstract

The instability of inorganic cesium lead halide perovskite quantum dots (QDs) limits their commercial applications. Here, a streamline surface nanotailoring strategy combining defect passivation and alumina infiltration and encapsulation via atomic layer deposition was employed to improve the luminescence properties and stability of QD films. Didodecyl dimethyl ammonium bromide with oleic acid pretreatment was used to reduce nonradiative recombination and photoluminescence quenching through strong bonding. Al 2 O 3 infiltrated through the gaps between the QDs with ng precision control and formed a dense encapsulation barrier, which separated QDs from the influence of the external environment. The fluorescence lifetime and the overall stability of the obtained QD films were greatly improved, which have application prospects in high-power white light-emitting diodes.

Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials Electronic materials Materials processing

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Organic Light-Emitting Diodes Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China

State Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China

Funding

Ministry of Science and Technology of the People's Republic of China · Science, Technology and Innovation Commission of Shenzhen Municipality · Natural Science Foundation of Hubei Province · National Natural Science Foundation of China

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