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

doi:10.1021/acs.jpclett.6b02763

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

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

188 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 language	English
Pages (from-to)	565-570
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	8
Issue number	3
DOIs	https://doi.org/10.1021/acs.jpclett.6b02763
Publication status	Published - 2017 Feb 2

All Science Journal Classification (ASJC) codes

Materials Science(all)
Physical and Theoretical Chemistry

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title = "Photoresponse of CsPbBr3 and Cs4PbBr6 Perovskite Single Crystals",

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.",

author = "Cha, {Ji Hyun} and Han, {Jae Hoon} and Wenping Yin and Cheolwoo Park and Yongmin Park and Ahn, {Tae Kyu} and Cho, {Jeong Ho} and Jung, {Duk Young}",

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T1 - Photoresponse of CsPbBr3 and Cs4PbBr6 Perovskite Single Crystals

AU - Cha, Ji Hyun

AU - Han, Jae Hoon

AU - Yin, Wenping

AU - Park, Cheolwoo

AU - Park, Yongmin

AU - Ahn, Tae Kyu

AU - Cho, Jeong Ho

AU - Jung, Duk Young

PY - 2017/2/2

Y1 - 2017/2/2

N2 - 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.

AB - 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.

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