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Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells

Journal of the American Chemical Society · 2009 · Vol. 131(17) · pp. 6050–6051

Akihiro Kojima✉(Toin University of Yokohama)Kenjiro Teshima(Tokyo Polytechnic University)Yasuo Shirai(Toin University of Yokohama)Tsutomu Miyasaka(Toin University of Yokohama)

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Abstract

Two organolead halide perovskite nanocrystals, CH(3)NH(3)PbBr(3) and CH(3)NH(3)PbI(3), were found to efficiently sensitize TiO(2) for visible-light conversion in photoelectrochemical cells. When self-assembled on mesoporous TiO(2) films, the nanocrystalline perovskites exhibit strong band-gap absorptions as semiconductors. The CH(3)NH(3)PbI(3)-based photocell with spectral sensitivity of up to 800 nm yielded a solar energy conversion efficiency of 3.8%. The CH(3)NH(3)PbBr(3)-based cell showed a high photovoltage of 0.96 V with an external quantum conversion efficiency of 65%.

Perovskite Materials and Applications Advanced Photocatalysis Techniques Quantum Dots Synthesis And PropertiesChemistryHalideNanocrystalline materialPerovskite (structure)Energy conversion efficiencyOptoelectronicsSemiconductorNanocrystalBand gapPhotovoltaic system

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