Issue 27, 2023

Uniform nucleation and growth of Cs3Cu2I5 nanocrystals with high luminous efficiency and structural stability and their application in white light-emitting diodes

Abstract

Copper-based ternary halide composites have attracted great attention due to their superior chemical stability and optical properties. Herein, we developed an ultrafast high-power ultrasonic synthesis strategy to realize the uniform nucleation and growth of highly luminescent and stable Cs3Cu2I5 nanocrystals (NCs). The as-synthesized Cs3Cu2I5 NCs show uniform hexagonal morphology with an average mean size of 24.4 nm and emit blue light with a high photoluminescence quantum yield (PLQY) of ∼85%. Moreover, the Cs3Cu2I5 NCs exhibit a remarkable stability during continuous eight times heating/cooling cycling tests (303–423 K). We also demonstrated an efficient and stable white light-emitting diode (WLED) with a high luminous efficiency (LE) of 41.5 lm W−1 and a Commission Internationale de l'Eclairage (CIE) color coordinate of (0.33,0.33).

Graphical abstract: Uniform nucleation and growth of Cs3Cu2I5 nanocrystals with high luminous efficiency and structural stability and their application in white light-emitting diodes

Supplementary files

Article information

Article type
Paper
Submitted
31 5 2023
Accepted
10 6 2023
First published
13 6 2023

Nanoscale, 2023,15, 11491-11496

Uniform nucleation and growth of Cs3Cu2I5 nanocrystals with high luminous efficiency and structural stability and their application in white light-emitting diodes

Z. Liu, W. Li, L. Wang, F. Zhang, S. Wang, J. Liu, C. Zhang, L. Yin, G. Jia, Z. Shi and X. Yang, Nanoscale, 2023, 15, 11491 DOI: 10.1039/D3NR02542J

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