Article Microscopic observations of RGB circularly polarized luminescence from solid microspheres with liquid crystalline molecular order

Kun Li (a Department of Materials Science, Institute of Pure and Applied Sciences, and Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba) ; Chunya Fu ; Hiroshi Yamagishi ; Sota Nakayama ; Wey Yih Heah ; Yixiang Cheng ; Reiko Oda ; Wijak Yospanya ; Yohei Yamamoto

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Kun Li, Chunya Fu, Hiroshi Yamagishi, Sota Nakayama, Wey Yih Heah, Yixiang Cheng, Reiko Oda, Wijak Yospanya, Yohei Yamamoto. Microscopic observations of RGB circularly polarized luminescence from solid microspheres with liquid crystalline molecular order. Science and Technology of Advanced Materials. 2025, 26 (), 2509486. https://doi.org/10.1080/14686996.2025.2509486

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(abstract)

Micro-particles with an internal helical liquid crystalline (LC) molecular order serve as efficient and highly compact circularly polarized luminescence (CPL) emitters. However, the coupling between CPL emission and the interior LC molecular order remains poorly understood at the single particle level. Here, we synthesized microspheres from a LC monomer RM23 together with a fluorescent dye and a chiral additive (R/S-BPy) and investigated their CPL properties. Polarized optical microscopy and angle-dependent CPL observations at a single-particle level revealed randomly distributed one-handed helical domains in each sphere, leading to CPL emission with an average dissymmetry factor value |glum| of 0.05 regardless the observation angle. The color of the CPL emission is tunable in the range of 450 to 700 nm by varying the fluorescent dyes doped in the spheres.

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Keyword: Liquid crystal, circularly polarized luminescence, microspheres

Date published: 2025-12-31

Publisher: Taylor & Francis

Journal:

  • Science and Technology of Advanced Materials (ISSN: 14686996) vol. 26 2509486

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Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5521

First published URL: https://doi.org/10.1080/14686996.2025.2509486

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Updated at: 2025-07-16 16:14:56 +0900

Published on MDR: 2025-06-06 08:20:09 +0900

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