Visible spectrum

Semiconductor

Physics

Nanocrystalline material

Energy transformation

Physical chemistry

Perovskite (structure)

Catalysis

Nanotechnology

Halide

Electrode

Nanocrystal

Organic chemistry

Inorganic chemistry

Band gap

Chemistry

Materials science

Quantum efficiency

Energy conversion efficiency

Photoelectrochemical cell

Perovskite solar cell

Solar cell

Optoelectronics

Electrolyte

Photochemistry

Crystallography

Mesoporous material

Thermodynamics

Journal of the American Chemical Society

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%.

Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells