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

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

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1489776
Alternate ID(s):
OSTI ID: 1463916
Journal Information:
Nanoscale, Vol. 10, Issue 33; ISSN 2040-3364
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 65 works
Citation information provided by
Web of Science

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Cited By (17)

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Luminescent Down‐Conversion Semiconductor Quantum Dots and Aligned Quantum Rods for Liquid Crystal Displays journal October 2019
Perovskites for Laser and Detector Applications journal June 2019
Metal halide perovskite nanocrystals and their applications in optoelectronic devices journal August 2019
Swelling‐Deswelling Microencapsulation‐Enabled Ultrastable Perovskite−Polymer Composites for Photonic Applications journal December 2019
In-situ fabricated anisotropic halide perovskite nanocrystals in polyvinylalcohol nanofibers: Shape tuning and polarized emission journal May 2019
Recent advances in one-dimensional halide perovskites for optoelectronic applications journal January 2018
Highly luminescent CsPbBr 3 nanorods synthesized by a ligand-regulated reaction at the water–oil interface journal January 2019
Photoelectrochemical immunoassay of aflatoxin B 1 in foodstuff based on amorphous TiO 2 and CsPbBr 3 perovskite nanocrystals journal January 2019
Anomalous variable-temperature photoluminescence of CsPbBr 3 perovskite quantum dots embedded into an organic solid journal January 2019
Defect passivation by alcohol-soluble small molecules for efficient p–i–n planar perovskite solar cells with high open-circuit voltage journal January 2019
Light diffusing, down-converting perovskite-on-polymer microspheres journal January 2019
Branched capping ligands improve the stability of cesium lead halide (CsPbBr 3 ) perovskite quantum dots journal January 2019
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Figures / Tables (15)