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Title
Japanese: 
English:Development of a Cholesteric Liquid Crystal Comprising a Mesogenic Fluorophore for Circularly Polarized Luminescence with a High Dissymmetry Factor 
Author
Japanese: 飯田, 権正行, 吉田 浩之, 田中 一生, 小西玄一.  
English: Yuto Iida, Masayuki Gon, Hiroyuk Yoshida, Kazuo Tanaka, Gen-ichi Konishi.  
Language English 
Journal/Book name
Japanese: 
English:Aggregate 
Volume, Number, Page Vol. 7    No. 3    p. e70304
Published date Feb. 27, 2026 
Publisher
Japanese: 
English:Wiley 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://onlinelibrary.wiley.com/doi/10.1002/agt2.70304
 
DOI https://doi.org/10.1002/agt2.70304
Abstract Circularly polarized luminescence (CPL) has attracted considerable attention owing to its wide range of potential applications. Cholesteric liquid crystals (CLCs) are promising candidates for CPL-active materials because of their ease of fabrication, stimulus responsiveness, and ability to achieve high dissymmetry factors (|glum|). In most studies on CPL-active CLCs, non-mesogenic luminophores are doped into commercially available liquid crystals (LCs). However, their low solubility in LCs (typically only a few wt%) and their tendency to disrupt LC alignment present challenges in achieving high |glum| values—particularly in thin cells—and in broadening the CPL spectra. Here, we report a new LC mixture comprising our previously designed mesogenic fluorophore and a commercially available LC. This strategy enables a markedly increased luminophore loading (up to ∼50 wt%) and enhances the birefringence of the LC matrix. As a result, we achieved a notably high |glum| value of 1.25 even in thin cells (2 µm), together with significantly broadened CPL spectra. Furthermore, the emission wavelength was successfully tuned via Förster resonance energy transfer. This work demonstrates a rational design strategy for LC mixtures that yield CPL materials with high |glum|, advances the fundamental understanding of CPL generation in photoluminescent CLCs, and highlights their potential for future photonic and optoelectronic applications.

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