Precise Synthesis of Organic Cocrystal Alloys with Full‐Spectrum Emission Characteristics for the Stepless Color Changing Display

Abstract

Organic luminescent materials are indispensable in optoelectronic displays and solid‐state luminescence applications. Compared with single‐component, multi‐component crystalline materials can improve optoelectronic characteristics. This work forms a series of full‐spectrum tunable luminescent charge‐transfer (CT) cocrystals ranging from 400 to 800 nm through intermolecular collaborative self‐assembly. What is even more interesting is that o‐TCP‐Cor(x)‐Pe(1−x), p‐TCP‐Cor(x)‐Pe(1−x), and o‐TCP‐AN(x)‐TP(1−x) alloys are prepared based on cocrystals by doping strategies, which correspondingly achieve the stepless color change from blue (CIE [0.22, 0.44]) to green (CIE [0.16, 0.14]), from green (CIE [0.27, 0.56]) to orange (CIE [0.58, 0.42]), from yellow (CIE [0.40, 0.57]) to red (CIE [0.65, 0.35]). The work provides an efficient method for precisely synthesizing new luminescent organic semiconductor materials and lays a solid foundation for developing advanced organic solid‐state displays.