journal article·2021-02-12

Multidentate Ligand Polyethylenimine Enables Bright Color-Saturated Blue Light-Emitting Diodes Based on CsPbBr3 Nanoplatelets

Wenxu Yin, Mengkai Li, Wei Dong, Zhao Luo, Yanxiu Li, Jingyu Qian, Jiaqi Zhang, Wei Zhang, Yu Zhang, Stephen V. Kershaw, Xiaoyu Zhang, Weitao Zheng, Andrey L. Rogach

ACS Energy Letters· Volume 6· Issue 2
Publisher page

Abstract

Solid-state color-saturated blue emitters are an essential part of light-emitting diodes (LEDs) and high-definition displays, and lead halide perovskite nanomaterials are one such type of emitter. Using a multidentate ligand polyethylenimine (PEI), we developed a soft template method to stabilize and enhance solid-state blue photoluminescence of CsPbBr3 nanoplatelets, whose lateral size became significantly increased without changing the thickness. From the spectral analysis, the PEI soft template prevented the coalescence of the CsPbBr3 nanoplatelets and decreased the density of their trap states, leading to a high photoluminescence quantum yield of 85% for their color-saturated blue emission in solution and 40% in films. LEDs based on CsPbBr3 nanoplatelets emit blue light at 465 nm with a high brightness of 631 cd m–2.
Source: openalex_inverted_index · Quality: baseline

Research context

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

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

Affiliations

Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Electron Microscopy Center, Jilin University, Changchun 130012, P.R. China

Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, Hong Kong SAR, P.R. China

State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, 130012, P.R. China

State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P.R. China

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · China Post-doctoral Science Foundation Funded Project · Croucher Foundation of Hong Kong · the National Science Foundation of China / Research Grant Council of Hong Kong

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