Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells
Akihiro Kojima, Kenjiro Teshima, Yasuo Shirai, Tsutomu Miyasaka
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%.
Topics & Concepts
ChemistryHalideNanocrystalline materialPerovskite (structure)Energy conversion efficiencyOptoelectronicsSemiconductorNanocrystalBand gapPhotovoltaic systemMesoporous materialSolar cellEnergy transformationVisible spectrumQuantum efficiencyPhotoelectrochemical cellPhotochemistryNanotechnologyInorganic chemistryElectrodeCatalysisMaterials sciencePhysical chemistryCrystallographyThermodynamicsEcologyBiologyElectrolytePhysicsBiochemistryPerovskite Materials and ApplicationsAdvanced Photocatalysis TechniquesQuantum Dots Synthesis And Properties