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

被引：74

作者：

He, Juan ^{[1
]}

Towers, Andrew ^{[2
,3
]}

Wang, Yanan ^{[2
,7
]}

Yuan, Peisen ^{[4
]}

Jiang, Zhang ^{[5
]}

Chen, Jiangshan ^{[4
]}

Gesquiere, Andre J. ^{[1
,2
,3
,6
]}

Wu, Shin-Tson ^{[1
]}

Dong, Yajie ^{[1
,2
,6
]}

机构：

[1] Univ Cent Florida, Coll Opt & Photon, Orlando, FL 32816 USA

[2] Univ Cent Florida, NanoSci Technol Ctr, Orlando, FL 32816 USA

[3] Univ Cent Florida, Dept Chem, Orlando, FL 32816 USA

[4] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou, Guangdong, Peoples R China

[5] Argonne Natl Lab, Xray Sci Div, Adv Photon Source, Argonne, IL 60439 USA

[6] Univ Cent Florida, Dept Mat Sci & Engn, Orlando, FL 32816 USA

[7] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Lab Adv Optoclect Mat, Suzhou 215123, Peoples R China

来源：

NANOSCALE | 2018年 / 10卷 / 33期

关键词：

LIGHT-EMITTING-DIODES; POLARIZED EMISSION; HALIDE PEROVSKITES; SEMICONDUCTOR NANOROD; HIGH-PERFORMANCE; PHASE SYNTHESIS; SHAPE CONTROL; NANOCRYSTALS; NANOWIRES; HETEROSTRUCTURES;

D O I：

10.1039/c8nr04895a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

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 (approximate to 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.

引用

页码：15436 / 15441

页数：6

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