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Title: Ultrathin Colloidal Cesium Lead Halide Perovskite Nanowires

Abstract

Highly uniform single crystal ultrathin CsPbBr3 nanowires (NWs) with diameter of 2.2 ± 0.2 nm and length up to several microns were successfully synthesized and purified using a catalyst-free colloidal synthesis method followed by a stepwise purification strategy. The NWs have bright photoluminescence (PL) with a photoluminescence quantum yield (PLQY) of about 30% after surface treatment. Large blue-shifted UV-vis absorption and PL spectra have been observed due to strong two-dimensional quantum confinement effects. A small angle X-ray scattering (SAXS) pattern shows the periodic packing of the ultrathin NWs along the radial direction, demonstrates the narrow radial distribution of the wires, and emphasizes the deep intercalation of the surfactants. Despite the extreme aspect ratios of the ultrathin NWs, their composition and the resulting optical properties can be readily tuned by an anion-exchange reaction with good morphology preservation. Furthermore, these bright ultrathin NWs may be used as a model system to study strong quantum confinement effects in a one-dimensional halide perovskite system.

Authors:
 [1];  [1];  [2];  [1];  [2];  [2]
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Kavli Energy NanoScience Institute, 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)
OSTI Identifier:
1532203
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 138; Journal Issue: 40; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhang, Dandan, Yu, Yi, Bekenstein, Yehonadav, Wong, Andrew B., Alivisatos, A. Paul, and Yang, Peidong. Ultrathin Colloidal Cesium Lead Halide Perovskite Nanowires. United States: N. p., 2016. Web. https://doi.org/10.1021/jacs.6b08373.
Zhang, Dandan, Yu, Yi, Bekenstein, Yehonadav, Wong, Andrew B., Alivisatos, A. Paul, & Yang, Peidong. Ultrathin Colloidal Cesium Lead Halide Perovskite Nanowires. United States. https://doi.org/10.1021/jacs.6b08373
Zhang, Dandan, Yu, Yi, Bekenstein, Yehonadav, Wong, Andrew B., Alivisatos, A. Paul, and Yang, Peidong. Tue . "Ultrathin Colloidal Cesium Lead Halide Perovskite Nanowires". United States. https://doi.org/10.1021/jacs.6b08373. https://www.osti.gov/servlets/purl/1532203.
@article{osti_1532203,
title = {Ultrathin Colloidal Cesium Lead Halide Perovskite Nanowires},
author = {Zhang, Dandan and Yu, Yi and Bekenstein, Yehonadav and Wong, Andrew B. and Alivisatos, A. Paul and Yang, Peidong},
abstractNote = {Highly uniform single crystal ultrathin CsPbBr3 nanowires (NWs) with diameter of 2.2 ± 0.2 nm and length up to several microns were successfully synthesized and purified using a catalyst-free colloidal synthesis method followed by a stepwise purification strategy. The NWs have bright photoluminescence (PL) with a photoluminescence quantum yield (PLQY) of about 30% after surface treatment. Large blue-shifted UV-vis absorption and PL spectra have been observed due to strong two-dimensional quantum confinement effects. A small angle X-ray scattering (SAXS) pattern shows the periodic packing of the ultrathin NWs along the radial direction, demonstrates the narrow radial distribution of the wires, and emphasizes the deep intercalation of the surfactants. Despite the extreme aspect ratios of the ultrathin NWs, their composition and the resulting optical properties can be readily tuned by an anion-exchange reaction with good morphology preservation. Furthermore, these bright ultrathin NWs may be used as a model system to study strong quantum confinement effects in a one-dimensional halide perovskite system.},
doi = {10.1021/jacs.6b08373},
journal = {Journal of the American Chemical Society},
number = 40,
volume = 138,
place = {United States},
year = {2016},
month = {9}
}

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Cited by: 130 works
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Figures / Tables:

Figure 1 Figure 1: Stepwise purification process of ultrathin CsPbBr3 NWs (scale bar: 50 nm).

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      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.