Water-Assisted Size and Shape Control of CsPbBr3 Perovskite Nanocrystals

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xiaoyu Zhang
  • Xue Bai
  • Hua Wu
  • Xiangtong Zhang
  • Chun Sun
  • Yu Zhang
  • Wei Zhang
  • Weitao Zheng
  • William W. Yu

Detail(s)

Original languageEnglish
Pages (from-to)3337-3342
Journal / PublicationAngewandte Chemie - International Edition
Volume57
Issue number13
Online published5 Feb 2018
Publication statusPublished - 19 Mar 2018

Abstract

Lead-halide perovskites are well known to decompose rapidly when exposed to polar solvents, such as water. Contrary to this common-place observation, we have found that through introducing a suitable minor amount of water into the reaction mixture, we can synthesize stable CsPbBr3 nanocrystals. The size and the crystallinity, and as a result the band gap tunability of the strongly emitting CsPbBr3 nanocrystals correlate with the water content. Suitable amounts of water change the crystallization environment, inducing the formation of differently shaped perovskites, namely spherical NCs, rectangular nanoplatelets, or nanowires. Bright CsPbBr3 nanocrystals with the photoluminescence quantum yield reaching 90 % were employed for fabrication of inverted hybrid inorganic/organic light-emitting devices, with the peak luminance of 4428 cd m−2 and external quantum yield of 1.7 %.

Research Area(s)

  • CsPbBr3, light-emitting device, perovskite nanocrystals, shape control, water additive

Citation Format(s)

Water-Assisted Size and Shape Control of CsPbBr3 Perovskite Nanocrystals. / Zhang, Xiaoyu; Bai, Xue; Wu, Hua et al.

In: Angewandte Chemie - International Edition, Vol. 57, No. 13, 19.03.2018, p. 3337-3342.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review