Photonic enhancement in photoluminescent metal halide perovskite-photonic crystal bead hybrids

We report two photonic crystal-perovskite nanocrystal microbead hybrids with photoluminescence matching that of the parent nanocrystals but with increased photoluminescence quantum yields. Time-resolved photoluminescence spectroscopy quantifies the radiative enhancement afforded by the photonic environment of the microbeads. The reported hybrids also demonstrate markedly better resistance to degradation in water over 30 days of immersion. Photonic crystal-perovskite nanocrystal hybrid beads exhibit Purcell enhancement and increased quantum yields of photoluminescence. The photonic crystal matrix is key for modulating the optoelectronic properties of the incorporated nanocrystals.