Issue 1, 2019

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

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

Supplementary files

Article information

Article type
Edge Article
Submitted
25 Aug. 2018
Accepted
02 Okt. 2018
First published
02 Okt. 2018
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2019,10, 172-178

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

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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