2019•Chemical CommunicationsRequires access

Electron band tuning of organolead halide perovskite materials by methylammonium and formamidinium halide post-treatment for high-efficiency solar cells

Atsushi Kogo, Masayuki Chikamatsu

Abstract

Perovskite crystals post-treated with methylammonium and formamidinium halide materials were compared. The bandgap energy of perovskites changed upon incorporation of CH5N2+, Br-, and Cl- ions. Perovskites treated with formamidinium iodide yielded the best efficiency of 20.06% due to an increase in photocurrent density by decreased bandgap energy.

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Key concepts: Formamidinium, Halide, Perovskite (structure), Chemistry, Electron, Inorganic chemistry, Photochemistry, Organic chemistry