Circularly Polarized Room-Temperature Phosphorescence from Dye-Doped Cholesteric Liquid Crystalline Polymer Networks
Wei Zhang1，Peipei Guan1，Jinghua Zhao2，Yonggang Yang1，Hongkun Li1（李红坤）*
1Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor Optoelectronics Materials and Devices, State and Local Joint Engineering Laboratory for Novel Functional PolymericMaterials, Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
2State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials, Department of Polymer Science and Engineering,College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
J. Phys. Chem. Lett. 2025, 16, 725−730727
Abstract: Circularly polarized luminescence (CPL) materials have drawn increasing attention for their potential applications in optical displays and chemo/biosensing. Nevertheless, the construction of circularly polarized room-temperature phosphorescence (CPRTP) materials is still a significant challenge. In this work, four liquid crystalline polymer network films with RTP properties have been fabricated via photopolymerization of cholesteric liquid–crystalline mixtures containing different amounts of commercially available dyes. The films show a yellow–green structural color, enhanced RTP, blue CPL, and green CPRTP with phosphorescence dissymmetry factors up to −0.90, quantum yields up to 14.8%, and emission lifetimes up to 607 ms. Furthermore, the prepared film pattern presents different colors in reflective, fluorescent, and phosphorescent modes. This work not only provides a deep understanding of RTP and CPRTP, but also presents a facile strategy to fabricate film patterns for decoration and anticounterfeiting applications.
Article information: //doi.org/10.1021/acs.jpclett.4c03479
