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 language | English |
|---|---|
| Pages (from-to) | 11085-11090 |
| Number of pages | 6 |
| Journal | Journal of the American Chemical Society |
| Volume | 140 |
| Issue number | 35 |
| DOIs | |
| Publication status | Published - Sep 5 2018 |
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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 journal › Article
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TY - JOUR
T1 - Cs2PbI2Cl2, All-Inorganic Two-Dimensional Ruddlesden-Popper Mixed Halide Perovskite with Optoelectronic Response
AU - Li, Jiangwei
AU - Yu, Qin
AU - He, Yihui
AU - Stoumpos, Constantinos C.
AU - Niu, Guangda
AU - Trimarchi, Giancarlo G.
AU - Guo, Hang
AU - Dong, Guifang
AU - Wang, Dong
AU - Wang, Liduo
AU - Kanatzidis, Mercouri G
PY - 2018/9/5
Y1 - 2018/9/5
N2 - 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.
AB - 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.
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U2 - 10.1021/jacs.8b06046
DO - 10.1021/jacs.8b06046
M3 - Article
VL - 140
SP - 11085
EP - 11090
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 35
ER -