Enhanced Charge Injection and Recombination of CsPbBr3 Perovskite Nanocrystals upon Internal Heterovalent Substitution

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

View graph of relations

Author(s)

  • Jingna Jia
  • Kena Fu
  • Shifeng Hou
  • Bin Zhang
  • Li Fu
  • Guizheng Zou

Detail(s)

Original languageEnglish
Pages (from-to)29916-29921
Journal / PublicationJournal of Physical Chemistry C
Volume123
Issue number49
Online published18 Nov 2019
Publication statusPublished - 12 Dec 2019

Abstract

Heterovalent substitution of the Pb(II) cation of CsPbBr3 perovskite nanocrystals (PNCs) with Sb(III) cation is developed as an internal engineering strategy to tailor their optoelectrical properties. Partially replacing Pb(II)-Br bonds of cubic CsPbBr3 PNCs with stronger Sb(III)-Br bonds can not only enlarge the band gap and preserve the highly-passivated surface states of parent PNCs but also enable the obtained Sb(III)-CsPbBr3 PNCs with both blue-shifted and enhanced absorbance, photoluminescence, and electrochemiluminescence as well as boosted electron and hole-injection responses via electrochemical redox. The enhanced absorbance and radiative charge transfer originate from both the increased vacancies in crystals and the impurity states in the band gap of PNCs upon substituting Pb(II) with Sb(III) because the increased vacancies are more favorable to recombine the electrons injected via photoexcitation and/or electrochemical redox, while suitable impurity states in the band gap of PNCs also facilitate electron transfer for charge recombination. Sb(III)-CsPbBr3 PNCs are promising monochromatic fluorophores and electrochemiluminophores; therefore, judiciously choosing suitable internal-engineering strategy to process PNCs has promise for their extended application.

Research Area(s)

  • LEAD HALIDE PEROVSKITES, ELECTROGENERATED CHEMILUMINESCENCE, OPTICAL-PROPERTIES, QUANTUM DOTS, SOLAR-CELLS, ELECTROCHEMILUMINESCENCE, PERFORMANCE, EMISSION, ELECTROCHEMISTRY, IMPACT

Citation Format(s)

Enhanced Charge Injection and Recombination of CsPbBr3 Perovskite Nanocrystals upon Internal Heterovalent Substitution. / Jia, Jingna; Fu, Kena; Hou, Shifeng; Zhang, Bin; Fu, Li; Hsu, Hsien-Yi; Zou, Guizheng.

In: Journal of Physical Chemistry C, Vol. 123, No. 49, 12.12.2019, p. 29916-29921.

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