Issue 17, 2017

High-quality CsPbBr3 perovskite nanocrystals for quantum dot light-emitting diodes

Abstract

Metal halide perovskites, such as CsPbX3 (X = Cl, Br, and I), have gained extensive attention due to their increasing demand in optoelectronic applications such as solar cells and lighting-emitting devices. Herein, we report a versatile approach to synthesize high-quality CsPbBr3 perovskite nanocrystals (sized 5–15 nm) by ligand-assisted reprecipitation at room temperature. The monodispersed CsPbBr3 nanocube perovskites displayed relatively high photoluminescence quantum yields of 50–80%. By virtue of the quantum size effects, the bandgap energies were manipulated from blue to green spectral regions (410–530 nm). In addition, through compositional modulations of the anion exchange technique, the bright photoluminescence could be almost tuned over the entire visible spectral region (450–650 nm). Furthermore, the photoluminescence of the CsPbBr3 nanocrystals was characterized by narrow emission line widths of 15–50 nm and radiative lifetimes of 5–15 ns. Finally, by taking advantage of these outstanding merits, the CsPbBr3 perovskites were successfully utilized in the application of highly fluorescent patterning and color-purity light-emitting diodes.

Graphical abstract: High-quality CsPbBr3 perovskite nanocrystals for quantum dot light-emitting diodes

Supplementary files

Article information

Article type
Paper
Submitted
02 12 2016
Accepted
26 12 2016
First published
07 2 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 10391-10396

High-quality CsPbBr3 perovskite nanocrystals for quantum dot light-emitting diodes

X. Du, G. Wu, J. Cheng, H. Dang, K. Ma, Y. Zhang, P. Tan and S. Chen, RSC Adv., 2017, 7, 10391 DOI: 10.1039/C6RA27665B

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