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Title: In situ synthesis and macroscale alignment of CsPbBr 3 perovskite nanorods in a polymer matrix

Abstract

Here, we report an in situ catalyst-free strategy to synthesize inorganic CsPbBr 3 perovskite nanorods in a polymer matrix (NRs-PM) with good dimensional control, outstanding optical properties and ultrahigh environmental stability. Polarization photoluminescence (PL) imaging with high spatial resolution was carried out for the first time on single nanorod (NR) and shows a relatively high local polarization ratio (~0.4) consistent with theoretical predictions based on a dielectric contrast model. We further demonstrate that macroscale alignment of the CsPbBr 3 nanorods can be achieved through mechanically stretching the NRs-PM films at elevated temperature, without deteriorating the optical quality of the NRs. In conclusion, a polarization ratio of 0.23 is observed for these aligned NRs-PM films, suggesting their potential as polarized down-converters to increase the light efficiency in liquid crystal display (LCD) backlights.

Authors:
ORCiD logo [1];  [1];  [1]; ORCiD logo [2];  [3];  [2];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of Central Florida, Orlando, FL (United States)
  2. South China Univ. of Technology, Guangzhou (China)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1489776
Alternate Identifier(s):
OSTI ID: 1463916
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 10; Journal Issue: 33; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

He, Juan, Towers, Andrew, Wang, Yanan, Yuan, Peisen, Jiang, Zhang, Chen, Jiangshan, Gesquiere, Andre J., Wu, Shin -Tson, and Dong, Yajie. In situ synthesis and macroscale alignment of CsPbBr3 perovskite nanorods in a polymer matrix. United States: N. p., 2018. Web. doi:10.1039/c8nr04895a.
He, Juan, Towers, Andrew, Wang, Yanan, Yuan, Peisen, Jiang, Zhang, Chen, Jiangshan, Gesquiere, Andre J., Wu, Shin -Tson, & Dong, Yajie. In situ synthesis and macroscale alignment of CsPbBr3 perovskite nanorods in a polymer matrix. United States. doi:10.1039/c8nr04895a.
He, Juan, Towers, Andrew, Wang, Yanan, Yuan, Peisen, Jiang, Zhang, Chen, Jiangshan, Gesquiere, Andre J., Wu, Shin -Tson, and Dong, Yajie. Wed . "In situ synthesis and macroscale alignment of CsPbBr3 perovskite nanorods in a polymer matrix". United States. doi:10.1039/c8nr04895a. https://www.osti.gov/servlets/purl/1489776.
@article{osti_1489776,
title = {In situ synthesis and macroscale alignment of CsPbBr3 perovskite nanorods in a polymer matrix},
author = {He, Juan and Towers, Andrew and Wang, Yanan and Yuan, Peisen and Jiang, Zhang and Chen, Jiangshan and Gesquiere, Andre J. and Wu, Shin -Tson and Dong, Yajie},
abstractNote = {Here, we report an in situ catalyst-free strategy to synthesize inorganic CsPbBr3 perovskite nanorods in a polymer matrix (NRs-PM) with good dimensional control, outstanding optical properties and ultrahigh environmental stability. Polarization photoluminescence (PL) imaging with high spatial resolution was carried out for the first time on single nanorod (NR) and shows a relatively high local polarization ratio (~0.4) consistent with theoretical predictions based on a dielectric contrast model. We further demonstrate that macroscale alignment of the CsPbBr3 nanorods can be achieved through mechanically stretching the NRs-PM films at elevated temperature, without deteriorating the optical quality of the NRs. In conclusion, a polarization ratio of 0.23 is observed for these aligned NRs-PM films, suggesting their potential as polarized down-converters to increase the light efficiency in liquid crystal display (LCD) backlights.},
doi = {10.1039/c8nr04895a},
journal = {Nanoscale},
number = 33,
volume = 10,
place = {United States},
year = {2018},
month = {7}
}

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Cited by: 11 works
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Figures / Tables:

Fig. 1 Fig. 1: In situ synthesis of luminescent CsPbBr3 NRs-PM. (a) Scheme of the CsPbBr3 NRs-PM formation process through SDM. (b) Fluorescence microscopy images of NRs-PM synthesized with different precursor concentrations and different spin-coating speeds. Focal planes were adjusted to be ∼4–5 mm underneath the top surface for all samples. Themore » insets on the top and left are schematic illustrations for the droplet size under different conditions. (c) XRD pattern of CsPbBr3 NRs-PS with standard monoclinic CsPbBr3 (PDF 18-0364) as a reference.« less

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