High Quantum Yields Enhancement Induced by Processable AIEgens Doped Photonic Crystal Powders for Bright Luminescence and Structural Colors

Abstract The composite solid‐state structure of photonic crystals (PCs) and aggregation‐induced‐emission agents (AIEgens) exhibits potential for various applications, owing to its remarkable anti‐aggregation quenching effect and exceptional fluorescence tuning ability. Herein, TVP molecules integrate into PCs by one‐step co‐assembly of TVP molecules and PMMA colloidal spheres. By carefully optimizing the assembly conditions, a kind of AIEgens doped structures fabricate, which exhibit vibrant structural color, bright fluorescence, and especially impressive luminescence quantum yield up to 0.838. Importantly, after being grounded into micron‐scale PC powders, the AIEgens doped PCs retain their good optical properties and exhibit exceptional light and thermal stability. Compared with the polymer film or deposited films on substrates of the previously reported composite PCs and AIEgens, the powder state endows them with good processibility, enabling them to be seamlessly integrate with various polymers to meet the diverse requirements of different processing techniques. The good processability facilitates the production of 2D or 3D models that possess both vivid structural color and bright luminescence. Moreover, the co‐assembly strategy of fabricating AIEgens doped PCs powders can be employed for the colloidal spheres with varying diameters or diverse AIEgens, thereby enabling the generation of adjustable luminescence and structural color, thus substantially broadening the potential application scenarios.