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Perovskite Solar Cell (PSC) Materials

 A perovskite solar cell, that was first reported by Miyasaka et al. in 2009, has recently received much attention.1) The organic-inorganic perovskite, RNH3PbX3 (X = Cl, Br, I), can function as a light absorption layer. Power conversion efficiency (PCE) of the perovskite solar cell is getting >15%, better than those of OPV and DSSC.2,3) A device of the perovskite solar cell is solution-processible enabling fabrication at low cost. The organic-inorganic perovskites RNH3PbX3 are easily prepared from HX salts of organic amines and lead halides. A modification of the halide X in the (MeNH3)PbX3 can control the range of absorption wavelength. The perovskite compound with X = Br is useful for light absorption in shorter wavelengths and the compound with X = I is relatively useful for that in longer wavelengths. Wakamiya et al. reported that use of highly dried lead(II) iodide is a key to fabricate efficient perovskite solar cell devices (PCE > 10%) with high reproducibility.4,5)

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