Strongly Emissive Lead-Free 0D Cs3Cu2I5 Perovskites Synthesized by a Room Temperature Solvent Evaporation Crystallization for Down-Conversion Light-Emitting Devices and Fluorescent Inks

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

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Author(s)

  • Fa Zhang
  • Ziheng Zhao
  • Bingkun Chen
  • Hong Zheng
  • Lingling Huang
  • Yue Liu
  • Yongtian Wang

Detail(s)

Original languageEnglish
Article number1901723
Journal / PublicationAdvanced Optical Materials
Volume8
Issue number8
Online published11 Feb 2020
Publication statusPublished - 17 Apr 2020

Abstract

Lead-free 0D metal halide perovskites are emerging environmentally friendly materials exhibiting large exciton binding energy, which have recently attracted great attention for their excellent light emission properties and favorable stability. Herein, solvent evaporation crystallization at room temperature is adopted to fabricate 0D Cs3Cu2I5 perovskite millimeter-sized crystals, which show strong blue photoluminescence (PL) with quantum yield of up to 89%, a large Stockes shift and long (microsecond) PL lifetime, originating from self-trapped excitons. UV pumped light-emitting diodes are demonstrated by using Cs3Cu2I5 powder as a solid-state phosphor, and the precursor solution of these perovskite crystals is used as a fluorescent ink. Furthermore, blue-emitting composite Cs3Cu2I5/polyvinylidene fluoride films are produced by spin coating through the solvent evaporation and followed patterning using a direct laser writing technology, which are potentially useful for displays. Finally, the solvent evaporation crystallization method is expanded to fabricate yellow emissive CsCu2I3 crystals by changing the chemical molar ratio of precursor.

Research Area(s)

  • Cs3Cu2I5, direct laser writing technology, fluorescent inks, lead-free 0D perovskites, UV-LEDs

Citation Format(s)

Strongly Emissive Lead-Free 0D Cs3Cu2I5 Perovskites Synthesized by a Room Temperature Solvent Evaporation Crystallization for Down-Conversion Light-Emitting Devices and Fluorescent Inks. / Zhang, Fa; Zhao, Ziheng; Chen, Bingkun; Zheng, Hong; Huang, Lingling; Liu, Yue; Wang, Yongtian; Rogach, Andrey L.

In: Advanced Optical Materials, Vol. 8, No. 8, 1901723, 17.04.2020.

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