Voltage‐Driven Molecular Orientation with Optical Synergy in Rare Earth Doped Polymer Dispersed Liquid Crystals

作者：Xu Sang, Adnan Khan, Rui Xu, Kang Zhang, Ye Tian, Yan Li, Ming Feng, Lisa Liu, Feng Song, Wei Huang · 发表于：Advanced Optical Materials · 年份：2024 · DOI：10.1002/adom.202400064 · 被引用次数：17 · 研究领域：Lanthanide and Transition Metal Complexes、Quantum optics and atomic interactions、Liquid Crystal Research Advancements

Abstract Achieving reversible large‐span photoluminescence regulation still faces difficulties due to limitations in the design or preparation conditions of related materials. Herein, a universal strategy that combines voltage‐driven molecular orientation with optical synergy between rare earth (RE) doped materials and polymer dispersed liquid crystals (PDLC) is proposed to achieve large‐span reversible opto‐electrically synergistic induced multi‐response photoluminescence regulation. The obtained Eu(tta) 3 phen/PDLC composites can exhibit different emission colors reversible transform from purple to purplish‐pink depending on the excitation wavelength and the applied electric voltage. The interaction between PDLC and Eu(tta) 3 phen is analyzed and the field distribution of internal microstructures is simulated using the finite‐difference time‐domain method, providing a theoretical basis for the voltage‐dependent photon interactions. The potential applications of Eu(tta) 3 phen/PDLC composites for anticounterfeiting is suggested by demonstrating a proof‐of‐concept anticounterfeiting system based on the composites. The strategy of opto‐electrically synergistic induced multi‐response photoluminescence regulation, with general applicability, can be easily extended to other RE doped materials and PDLC systems, opening up new possibilities for photoluminescence regulation research.