Efficient electronic coupling and heterogeneous charge transport of zero-dimensional Cs4PbBr6perovskite emitters

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

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Author(s)

  • Xu Han
  • Guohua Jia
  • Kuan-Chen Cheng
  • Honglan Qi
  • Xingli Zou
  • Guizheng Zou

Detail(s)

Original languageEnglish
Pages (from-to)23803-23811
Journal / PublicationJournal of Materials Chemistry A
Volume8
Issue number45
Online published24 Sep 2020
Publication statusPublished - 7 Dec 2020

Abstract

Organic and/or inorganic halide perovskites have become a new class of optoelectronic materials by virtue of excellent attractive physical and chemical characteristics. In this context, the zero-dimensional (0-D) cesium lead bromide (Cs4PbBr6) perovskite with outstanding photoluminescence (PL) properties has been recognized as the most promising candidate. However, the electron transfer dynamics and electrochemical behaviors of Cs4PbBr6 emitters still remain unclear. Herein, we prepared the 0-D Cs4PbBr6 perovskite emitters and investigated the exciton transport and electrochemical dynamics by utilizing temperature-dependent transient photoluminescence (TRPL) and electrogenerated chemiluminescence (ECL) techniques, respectively. Stronger electronic coupling of Cs4PbBr6 emitters arises from the overlap of electronic wavefunctions, indicating the increased possibility for the generation of electrochemiluminescence. Through the determination of the diffusion coefficient and electron-transfer rate by using an electrochemical method, we confirm that effective heterogeneous charge transfer at the interface of the electrode and electrolyte results in red-shifted ECL emission in the presence of benzoyl peroxide (BPO) as the co-reactant. The development of zero-dimensional perovskite emitters opens up a new avenue in the field of emerging optoelectronic and biosensing technologies, including but not limited to ECL devices, ECL immunoassays, organic light-emitting diodes, light-emitting electrochemical cells, and other bio-related detections.

Citation Format(s)

Efficient electronic coupling and heterogeneous charge transport of zero-dimensional Cs4PbBr6perovskite emitters. / Liu, Rugeng; Mak, Chun Hong; Han, Xu; Tang, Yunqi; Jia, Guohua; Cheng, Kuan-Chen; Qi, Honglan; Zou, Xingli; Zou, Guizheng; Hsu, Hsien-Yi.

In: Journal of Materials Chemistry A, Vol. 8, No. 45, 07.12.2020, p. 23803-23811.

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