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

Abstract

Alloying different semiconductors is a powerful approach to tuning the optical and electronic properties of semiconductor materials. In halide perovskites (ABX 3), 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 xSn 1- xI 3 nanowires (NWs). The electronic band gaps of CsPb xSn 1- xI 3 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 Sn 2+ is alloyed with Pb 2+, possibly due to the increase of charge carrier concentration when more Sn 2+ is introduced. The wide tunability of the optical and electronic properties makes CsPb xSn 1-xI 3 alloy NWs promising candidates for future optoelectronic device applications.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [2];  [3];  [1];  [4]; ORCiD logo [5]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of Hawaii at Manoa, Honolulu, HI (United States)
  3. Purdue Univ., West Lafayette, IN (United States)
  4. Shanghai Tech Univ., Shanghai (China)
  5. Univ. of California, Berkeley, CA (United States). Kavli Energy NanoScience Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1601182
Grant/Contract Number:  
[AC02-05CH11231]
Resource Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
[ Journal Volume: 18; Journal Issue: 6]; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Semiconductor alloy; tunability; halide perovskite; nanowires

Citation Formats

Lei, Teng, Lai, Minliang, Kong, Qiao, Lu, Dylan, Lee, Woochul, Dou, Letian, Wu, Vincent, Yu, Yi, and Yang, Peidong. Electrical and Optical Tunability in All-Inorganic Halide Perovskite Alloy Nanowires. United States: N. p., 2018. Web. doi:10.1021/acs.nanolett.8b00603.
Lei, Teng, Lai, Minliang, Kong, Qiao, Lu, Dylan, Lee, Woochul, Dou, Letian, Wu, Vincent, Yu, Yi, & Yang, Peidong. Electrical and Optical Tunability in All-Inorganic Halide Perovskite Alloy Nanowires. United States. doi:10.1021/acs.nanolett.8b00603.
Lei, Teng, Lai, Minliang, Kong, Qiao, Lu, Dylan, Lee, Woochul, Dou, Letian, Wu, Vincent, Yu, Yi, and Yang, Peidong. Thu . "Electrical and Optical Tunability in All-Inorganic Halide Perovskite Alloy Nanowires". United States. doi:10.1021/acs.nanolett.8b00603. https://www.osti.gov/servlets/purl/1601182.
@article{osti_1601182,
title = {Electrical and Optical Tunability in All-Inorganic Halide Perovskite Alloy Nanowires},
author = {Lei, Teng and Lai, Minliang and Kong, Qiao and Lu, Dylan and Lee, Woochul and Dou, Letian and Wu, Vincent and Yu, Yi and Yang, Peidong},
abstractNote = {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 CsPbxSn1- xI3 nanowires (NWs). The electronic band gaps of CsPbxSn1- 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 CsPbxSn1-xI3 alloy NWs promising candidates for future optoelectronic device applications.},
doi = {10.1021/acs.nanolett.8b00603},
journal = {Nano Letters},
number = [6],
volume = [18],
place = {United States},
year = {2018},
month = {5}
}

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