In Situ Synthesis And Macroscale Alignment Of Cspbbr3 Perovskite Nanorods In A Polymer Matrix

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.

Publication Date

9-7-2018

Publication Title

Nanoscale

Volume

10

Issue

33

Number of Pages

15436-15441

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1039/c8nr04895a

Socpus ID

85052515746 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85052515746

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