In situ synthesis and macroscale alignment of CsPbBr3 perovskite nanorods in a polymer matrix

He, Juan; Towers, Andrew; Wang, Yanan; Yuan, Peisen; Jiang, Zhang; Chen, Jiangshan; Gesquiere, Andre J.; Wu, Shin -Tson; Dong, Yajie

doi:10.1039/c8nr04895a

Title: In situ synthesis and macroscale alignment of CsPbBr₃ perovskite nanorods in a polymer matrix

Journal Article · 24 July 2018 · Nanoscale

DOI: https://doi.org/10.1039/c8nr04895a · OSTI ID:1489776

^[1]; Towers, Andrew ^[1]; Wang, Yanan ^[1];

^[2]; Jiang, Zhang ^[3]; Chen, Jiangshan ^[2]; Gesquiere, Andre J. ^[1];

^[1];

^[1]

Univ. of Central Florida, Orlando, FL (United States)
South China Univ. of Technology, Guangzhou (China)
Argonne National Lab. (ANL), Argonne, IL (United States)

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.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1489776

Journal Information:: Nanoscale, Journal Name: Nanoscale Journal Issue: 33 Vol. 10; ISSN NANOHL; ISSN 2040-3364

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Title: In situ synthesis and macroscale alignment of CsPbBr₃ perovskite nanorods in a polymer matrix