6.5% efficient perovskite quantum-dot-sensitized solar cell
Jeong‐Hyeok ImSchool of Chemical Engineering and Department of Energy Science, Sungkyunkwan University, Suwon 440-746, KoreaChang-Ryul LeeSchool of Chemical Engineering and Department of Energy Science, Sungkyunkwan University, Suwon, KoreaJin‐Wook LeeSchool of Chemical Engineering and Department of Energy Science, Sungkyunkwan University, Suwon, KoreaSang‐Won ParkSchool of Chemical Engineering and Department of Energy Science, Sungkyunkwan University, Suwon, KoreaNam‐Gyu ParkSchool of Chemical Engineering and Department of Energy Science, Sungkyunkwan University, Suwon, Korea
2011en
ABI
Аннотация
Highly efficient quantum-dot-sensitized solar cell is fabricated using ca. 2-3 nm sized perovskite (CH(3)NH(3))PbI(3) nanocrystal. Spin-coating of the equimolar mixture of CH(3)NH(3)I and PbI(2) in γ-butyrolactone solution (perovskite precursor solution) leads to (CH(3)NH(3))PbI(3) quantum dots (QDs) on nanocrystalline TiO(2) surface. By electrochemical junction with iodide/iodine based redox electrolyte, perovskite QD-sensitized 3.6 μm-thick TiO(2) film shows maximum external quantum efficiency (EQE) of 78.6% at 530 nm and solar-to-electrical conversion efficiency of 6.54% at AM 1.5G 1 sun intensity (100 mW cm(-2)), which is by far the highest efficiency among the reported inorganic quantum dot sensitizers.
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