Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells

Akihiro Kojima; Kenjiro Teshima; Yasuo Shirai; Tsutomu Miyasaka

doi:10.1021/ja809598r

Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells

Галогенидные органометаллические перовскиты как сенсибилизаторы фотоэлектрических элементов в видимой области спектра

Akihiro Kojima, Kenjiro Teshima, Yasuo Shirai, Tsutomu Miyasaka

2009-04-14

SCID: 54.1/nbbs3ch4 Discuss with AI

TiO2 sensitizationorganolead halide perovskitesperovskite nanocrystalsphotoelectrochemical cellssolar energy conversion efficiency

Abstract (AI)

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%.

Key Findings

CH₃NH₃PbBr₃ and CH₃NH₃PbI₃ nanocrystals efficiently sensitize mesoporous TiO₂ for visible-light conversion in photoelectrochemical cells.

CH₃NH₃PbBr₃-based cells deliver a high photovoltage of 0.96 V and an external quantum conversion efficiency of 65%.

CH₃NH₃PbI₃-based cells show spectral sensitivity extending to 800 nm and achieve 3.8% solar energy conversion efficiency.

Self-assembled perovskite nanocrystals on mesoporous TiO₂ films exhibit strong semiconductor band-gap absorption.

Research Object

CH(3)NH(3)PbBr(3) and CH(3)NH(3)PbI(3) organolead halide perovskite nanocrystals self-assembled on mesoporous TiO(2) films in photoelectrochemical cells

Research Subject

Their visible-light sensitization of TiO(2) and the resulting photovoltaic performance, including spectral sensitivity, solar energy conversion efficiency, photovoltage, and external quantum conversion efficiency

Publication Details

DOI

10.1021/ja809598r

Publication Date

2009-04-14

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Authors

Akihiro Kojima

Kenjiro Teshima

Yasuo Shirai

Tsutomu Miyasaka

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