Cs2PbI2Cl2, All-Inorganic Two-Dimensional Ruddlesden-Popper Mixed Halide Perovskite with Optoelectronic Response

Jiangwei Li, Qin Yu, Yihui He, Constantinos C. Stoumpos, Guangda Niu, Giancarlo G. Trimarchi, Hang Guo, Guifang Dong, Dong Wang, Liduo Wang, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The two-dimensional Ruddlesden-Popper (RP) phases are an important class of halide perovskites with versatile optoelectronic properties. So far, only organic-inorganic hybrid RP phases involving long organic spacers were reported in this class. Here, we report an all-inorganic RP phase lead halide perovskite, Cs2PbI2Cl2 (1, I4/mmm space group; a = 5.6385(8) Å, c = 18.879(4) Å), synthesized by a solid-state method. The compound exhibits a band gap of Eg â 3.04 eV and photoconductivity. We find an anomalous band gap evolution in Cs2Pb1-xSnxI2Cl2 solid solutions. Our combined density functional theory and experimental study supports the thermodynamically stable nature of 1 as a unique ordered phase in the Cs2PbX4 (X = Cl, Br, I) system. The calculations suggest that 1 is a direct bandgap semiconductor with relatively small effective carrier mass along the in-plane direction, consistent with the experimentally observed in-plane UV-light photoresponse. We also demonstrate that 1 is promising for radiation detection capable of α-particle counting. Moreover, 1 shows markedly ambient and thermal stability.

Original languageEnglish
Pages (from-to)11085-11090
Number of pages6
JournalJournal of the American Chemical Society
Volume140
Issue number35
DOIs
Publication statusPublished - Sep 5 2018

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Semiconductors
Ultraviolet Rays
Optoelectronic devices
Perovskite
Energy gap
Hot Temperature
Radiation
Photoconductivity
Ultraviolet radiation
Density functional theory
Solid solutions
Thermodynamic stability
Semiconductor materials
Direction compound
perovskite

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Cs2PbI2Cl2, All-Inorganic Two-Dimensional Ruddlesden-Popper Mixed Halide Perovskite with Optoelectronic Response. / Li, Jiangwei; Yu, Qin; He, Yihui; Stoumpos, Constantinos C.; Niu, Guangda; Trimarchi, Giancarlo G.; Guo, Hang; Dong, Guifang; Wang, Dong; Wang, Liduo; Kanatzidis, Mercouri G.

In: Journal of the American Chemical Society, Vol. 140, No. 35, 05.09.2018, p. 11085-11090.

Research output: Contribution to journalArticle

Li, J, Yu, Q, He, Y, Stoumpos, CC, Niu, G, Trimarchi, GG, Guo, H, Dong, G, Wang, D, Wang, L & Kanatzidis, MG 2018, 'Cs2PbI2Cl2, All-Inorganic Two-Dimensional Ruddlesden-Popper Mixed Halide Perovskite with Optoelectronic Response', Journal of the American Chemical Society, vol. 140, no. 35, pp. 11085-11090. https://doi.org/10.1021/jacs.8b06046
Li, Jiangwei ; Yu, Qin ; He, Yihui ; Stoumpos, Constantinos C. ; Niu, Guangda ; Trimarchi, Giancarlo G. ; Guo, Hang ; Dong, Guifang ; Wang, Dong ; Wang, Liduo ; Kanatzidis, Mercouri G. / Cs2PbI2Cl2, All-Inorganic Two-Dimensional Ruddlesden-Popper Mixed Halide Perovskite with Optoelectronic Response. In: Journal of the American Chemical Society. 2018 ; Vol. 140, No. 35. pp. 11085-11090.
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