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

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Abstract

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. 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.

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

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Publication details

The article was received on 16 Jun 2018, accepted on 25 Jul 2018 and first published on 25 Jul 2018


Article type: Communication
DOI: 10.1039/C8NR04895A
Citation: Nanoscale, 2018, Advance Article
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    In situ synthesis and macroscale alignment of CsPbBr3 perovskite nanorods in a polymer matrix

    J. He, A. Towers, Y. Wang, P. Yuan, Z. Jiang, J. Chen, A. J. Gesquiere, S. Wu and Y. Dong, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR04895A

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