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Issue 1, 2019
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Photon-upconverting chiral liquid crystal: significantly amplified upconverted circularly polarized luminescence

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Abstract

In this work, we demonstrate a room-temperature chiral liquid crystal which shows remarkable photon upconverted circularly polarized luminescence (UC-CPL). Circularly polarized luminescent materials with higher dissymmetry factor (glum) underpin the basis for future applications. Since most chiral organic molecules have only a small glum, it is vital to explore a new pathway to amplify the glum of organic compounds. Here, by dispersing a chiral emitter and a triplet donor into a room-temperature nematic liquid crystal, highly efficient triplet–triplet annihilation-based photon upconversion (TTA-UC) and UC-CPL were observed in the induced chiral nematic liquid crystal (N*LC). Moreover, this system could simultaneously amplify the promoted circularly polarized luminescence (CPL) and the upconverted circularly polarized luminescence. The dissymmetry factors glum of CPL and UC-CPL have been amplified by three orders of magnitude and one order of magnitude, respectively.

Graphical abstract: Photon-upconverting chiral liquid crystal: significantly amplified upconverted circularly polarized luminescence

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Supplementary files

Article information


Submitted
25 Aug 2018
Accepted
02 Oct 2018
First published
02 Oct 2018

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2019,10, 172-178
Article type
Edge Article

Photon-upconverting chiral liquid crystal: significantly amplified upconverted circularly polarized luminescence

X. Yang, J. Han, Y. Wang and P. Duan, Chem. Sci., 2019, 10, 172
DOI: 10.1039/C8SC03806F

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