Progress and Perspective on Stimulus‐Responsive Luminescent Blue Phase Liquid Crystals for Photonic Applications

Luminescent blue phase liquid crystal (LBPLC) is an important material used in the construction of optoelectronic devices, with broad application prospects in the fields of lasers, display devices, and smart materials. Studying the fluorescence regulation of LBPLCs is crucial for further utilization and enhancement of its optoelectronic properties. This review systematically summarizes the recent advancements in LBPLC, categorizing them into two parts: small‐molecule BPLC and BPLC polymer (BPLCP). Among them, small‐molecule LBPLC is further divided into three types based on modulating methods: photoswitch‐doped, luminescent dye‐doped and nanoparticle‐doped, while BPLCP is divided into polymer‐stabilized BPLCs (PS‐BPLC) and BPLC elastomers (BPLCEs). This review also outlines fluorescence regulation mechanisms, highlights diverse applications of stimuli‐responsive LBPLCs, and discusses current challenges and future perspectives. This review aims to contribute to the interest inspiration and future research development of LBPLC.