Engg physics explain perovskite crystal structure
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➡️➡️➡️A perovskite is any material with the same type of crystal structure as calcium titanium oxide CaTiO3♾♾ known as the perovskite structure, orXIIA2+VIB4+X2−3 with the oxygen in the face centers✔✔✔
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Two organolead halide perovskite nanocrystals, CH3NH3PbBr3 and CH3NH3PbI3, were found to efficiently sensitize TiO2 for visible-light conversion in photoelectrochemical cells. When self-assembled on mesoporous TiO2 films, the nanocrystalline perovskites exhibit strong band-gap absorptions as semiconductors. The CH3NH3PbI3-based photocell with spectral sensitivity of up to 800 nm yielded a solar energy conversion efficiency of 3.8%. The CH3NH3PbBr3-based cell showed a high photovoltage of 0.96 V with an external quantum conversion efficiency of 65%.
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