Fabrications of twisted moir photonic crystal and random moir photonic crystal and their potential applications in light extraction

Twisted moire photonic crystal is an optical analog of twisted graphene or twisted transition metal dichalcogenide bilayers. In this paper, we report the fabrication of twisted moire photonic crystals and randomized moire photonic crystals and their use in enhanced extraction of light in light-emitting diodes (LEDs). Fractional diffraction orders from randomized moire photonic crystals are more uniform than those from moire photonic crystals. Extraction efficiencies of 76.5%, 77.8% and 79.5% into glass substrate are predicted in simulations of LED patterned with twisted moire photonic crystals, defect-containing photonic crystals and random moire photonic crystals, respectively, at 584 nm. Extraction efficiencies of optically pumped LEDs with 2D perovskite (BA)2(MA) n-1PbnI3n+1 of n = 3 and (5-(2 '-pyridyl)-tetrazolato)(3-CF3-5-(2 '-pyridyl)pyrazolato) platinum(II) (PtD) have been measured.