Organic-inorganic lead halide perovskites (APbI3) have shown tremendous growth in solar cell efficiencies, however, our atomistic understanding of the intrinsic instability due to the A-cations size effects is far from...
We provide a deep atomistic understanding of the structural, energetic, electronic, and optical properties of the CH3NH3 (methylammonium, MA), CH3PH3 (methylphosphonium, MP) and CH(NH2)2 (formamidinium, FA) compounds based on DFT calculations.
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