纳米棒
材料科学
光致发光
极化(电化学)
钙钛矿(结构)
聚合物
原位
电介质
光电子学
纳米技术
化学工程
复合材料
物理化学
化学
有机化学
工程类
作者
Jinwei He,Andrew Towers,Yanan Wang,Peisen Yuan,Jiang Zhang,Jiangshan Chen,Andre J. Gesquiere,Shin‐Tson Wu,Yajie Dong
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2018-01-01
卷期号:10 (33): 15436-15441
被引量:67
摘要
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.
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