Photoresponse of CsPbBr3 and Cs4PbBr6 Perovskite Single Crystals

Ji Hyun Cha, Jae Hoon Han, Wenping Yin, Cheolwoo Park, Yongmin Park, Tae Kyu Ahn, Jeong Ho Cho, Duk Young Jung

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173 Citations (Scopus)

Abstract

High-quality and millimeter-sized perovskite single crystals of CsPbBr3 and Cs4PbBr6 were prepared in organic solvents and studied for correlation between photocurrent generation and photoluminescence (PL) emission. The CsPbBr3 crystals, which have a 3D perovskite structure, showed a highly sensitive photoresponse and poor PL signal. In contrast, Cs4PbBr6 crystals, which have a 0D perovskite structure, exhibited more than 1 order of magnitude higher PL intensity than CsPbBr3, which generated an ultralow photoresponse under illumination. Their contrasting optoelectrical characteristics were attributed to different exciton binding energies, induced by coordination geometry of the [PbBr6]4- octahedron sublattices. This work correlated the local structures of lead in the primitive perovskite and its derivatives to PL spectra as well as photoconductivity.

Original languageEnglish
Pages (from-to)565-570
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume8
Issue number3
DOIs
Publication statusPublished - 2017 Feb 2

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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    Cha, J. H., Han, J. H., Yin, W., Park, C., Park, Y., Ahn, T. K., Cho, J. H., & Jung, D. Y. (2017). Photoresponse of CsPbBr3 and Cs4PbBr6 Perovskite Single Crystals. Journal of Physical Chemistry Letters, 8(3), 565-570. https://doi.org/10.1021/acs.jpclett.6b02763