Circularly Polarized Phosphorescence Energy Transfer Combined with Chirality‐Selective Absorption for Modulating Full‐Color and White Circularly Polarized Long Afterglow

Abstract Circularly polarized long afterglow (CPLA) attracts great interests in multi‐disciplinary fields with significant potentials in optical multiplexing applications, but achieving full‐color and white CPLA is still challenging. The present contribution reports the first success in utilizing circularly polarized phosphorescence energy transfer (CPP‐ET) combined with chirality‐selective absorption (CSA) to construct full‐color and white CPLA materials. Blue CPLA with luminescence dissymmetry factor ( g lum ) of 3×10 −2 is firstly obtained via the CSA effect of chiral helical polyacetylene and blue ultralong afterglow of inorganic phosphor BP. Significantly, full‐color and white CPLA films are prepared by simply blending different fluorophores into the blue‐CPLA films via CPP‐ET. Benefited from the persistent luminescence of BP, the lifetimes of the fluorophores increase from nanoseconds to minutes, and ultralong full‐color CPLA emissions lasting for more than 20 min are realized with g lum of 10 −3 . Also noticeably, chiral optoelectronic devices, multi‐dimension information encryption and chiral logic gate are developed based on the full‐color tunable CPLA‐active materials. The established strategy provides a universal platform for future development of CPLA‐active materials with great applications.