Hybrid Inorganic Perovskite-Photonic Crystal Beads with High Quantum Yields of Photoluminescence

The integration of photonic materials with semiconductor nanocrystals by correlating the photonic stopband and bandgap energy is expected to afford hybrid materials with enhanced optoelectronic properties. Here, we report two photonic crystal–perovskite nanocrystal microbead hybrids synthesized through simple vacuum drying techniques. Photonic polystyrene microbeads combined with metal halide perovskite nanocrystals yield hybrids with expected photoluminescence maxima when excited above the bandgap energy but unexpectedly high photoluminescence quantum yields (as high as 198 %). These microbead hybrid systems also demonstrated better resistance to degradation in water over 30 days of immersion as compared to their colloidal counterparts.