Design of perovskite photonic crystals for emission control

Here we design photonic nanostructures for perovskite thin film of CH₃NH₃PbI₃ (MAPbI₃). Optical properties of perovskite thin film are reported with the emission spectra peaked at 765 nm with FWHM of 50 nm. Based on the experimentally obtained optical constants, two-dimensional perovskite photonic crystals are designed through plane wave expansion and finite element methods. The calculated band structure of 2D photonic crystal slab shows the photonic band gap at 750-800 nm, originated from the x-y plane wave excitation. Incorporating one-hole and three-hole missing cavities in the photonic crystal slabs generates one and two modes in electric field spectra, respectively, indicating that the one hole missing cavity is more efficient for low power consumption of light source devices. (paper)