Electrical and Optical Tunability in All-Inorganic Halide Perovskite Alloy Nanowires

Nano Letters
Teng LeiPeidong Yang

Abstract

Alloying different semiconductors is a powerful approach to tuning the optical and electronic properties of semiconductor materials. In halide perovskites (ABX3), alloys with different anions have been widely studied, and great band gap tunability in the visible range has been achieved. However, perovskite alloys with different cations at the "B" site are less understood due to the synthetic challenges. Herein, we first have developed the synthesis of single-crystalline CsPb xSn1- xI3 nanowires (NWs). The electronic band gaps of CsPb xSn1- xI3 NWs can be tuned from 1.3 to 1.78 eV by varying the Pb/Sn ratio, which leads to the tunable photoluminescence (PL) in the near-infrared range. More importantly, we found that the electrical conductivity increases as more Sn2+ is alloyed with Pb2+, possibly due to the increase of charge carrier concentration when more Sn2+ is introduced. The wide tunability of the optical and electronic properties makes CsPb xSn1- xI3 alloy NWs promising candidates for future optoelectronic device applications.

References

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Citations

Apr 24, 2019·Advanced Materials·Azhar FakharuddinLukas Schmidt-Mende
Jun 11, 2020·Physical Chemistry Chemical Physics : PCCP·Joohoon Kang, Jeong Ho Cho
Dec 22, 2020·Advanced Materials·Hsin-Ping WangJr-Hau He
Jun 1, 2021·ACS Energy Letters·Jun Xi, Maria Antonietta Loi
Jun 18, 2021·ACS Nano·Amrita DeyLakshminarayana Polavarapu
Jul 13, 2021·Chemical Reviews·Jie ChenOsman M Bakr
Jan 3, 2020·ACS Applied Materials & Interfaces·Xiaoming TangHao Wang
Oct 16, 2019·Journal of the American Chemical Society·Roc MatheuOmar M Yaghi
Apr 30, 2020·Nano Letters·Jianmei HuangPeidong Yang

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