Inorganic Ligand Triggered Transformation from Cs₄PbBr₆ Nanocrystals to Blue-Emitting CsPbBr₃ Nanoplatelets

Rui Yun; Huanxin Yang; Yue Li; Yuling Liu; Yiyue Chu; Suli Wu; Xiaowang Liu; Xiaodan Zhang; Libing Zhang; Xiyan Li

doi:10.1021/acs.chemmater.2c02794

journal article·2023-01-24

Inorganic Ligand Triggered Transformation from Cs₄PbBr₆ Nanocrystals to Blue-Emitting CsPbBr₃ Nanoplatelets

Rui Yun, Huanxin Yang, Yue Li, Yuling Liu, Yiyue Chu, Suli Wu, Xiaowang Liu, Xiaodan Zhang, Libing Zhang, Xiyan Li

Chemistry of Materials· Volume 35· Issue 2

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Source abstract

Abstract

Blue-emitting perovskite nanoplates (NPLs) have been widely investigated for display application. However, the traditional synthetic techniques for high-quality perovskite NPLs are still limited due to their rapid crystallization rate. Here, we developed an inorganic ligand (NOBF4) mediated transformation strategy to obtain blue-emitting CsPbBr3 NPLs. The transformation process was based on the dissolution–recrystallization in a nonpolar environment, involving the dissociation of Cs4PbBr6 NCs to Pb ions, which then reformed PbBr64– octahedrons and finally formed two monolayer NPLs with pure blue-emission (line width ∼12 nm). The whole transformation process was clearly detected, and during the process the reorganization of organic ligands tuned by NO+ played a crucial role in the formation of NPLs. This work provides an effective strategy for obtaining pure blue-emitting NPLs and builds a platform for exploring the mechanism for the anisotropic growth of perovskite crystals.

Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Luminescence Properties of Advanced Materials · Quantum Dots Synthesis And Properties

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

Affiliations

Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Conversion Center, Nankai University, Tianjin300350, China

Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Tianjin300350, China

Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education, Tianjin300350, China

Tianjin Key Laboratory of Molecular Optoelectronic, Department of Chemistry, Tianjin University, Tianjin300072, China

State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian116024, China

Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Shaanxi Institute of Flexible Electronics (SIFE), Institute of Flexible Electronics (IFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an710072, China

Funding

National Natural Science Foundation of China

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