第6回クリスタル科学セミナーでPatrick M. Woodward教授(オハイオ州立大学)が講演

平成２9年7月31日(月)、オハイオ州立大学化学生物学科教授Patrick M. Woodward氏が来所し、山梨大学クリスタル科学研究センター４階セミナー室において１0時4０分～11時3０分に渡って第6回クリスタル科学セミナーとして”Solid State Chemistry Investigations of Halide Perovskites and Double Perovskites”と題した講演をしてくださいました。活発な議論がなされました。講演の概要は以下の通りです。

The AMX₃ (A = Cs, Rb, CH₃NH₃; M = Pb, Sn, Ge; X = I, Br, Cl) halide perovskites are a versatile and promising class of materials. Their electrical and optical properties are comparable to conventional compound semiconductors, which makes them suitable for many applications, including solution processed solar cells. Unlike conventional semiconductors the electronic structure, and optoelectronic properties, of halide perovskites can be tuned through distortions of the crystal structure.  In the first part of my talk I will discuss our studies of Cs_1−xRb_xPbBr₃ and Cs_1−xRb_xPbCl₃ solid solutions.  In the second part of my talk I will discuss our efforts to synthesize and characterize new halide double perovskites, Cs₂BB′X₆ (B = Ag, Na; B′ = Bi, Sb, In; X = Cl, Br), with tunable band gaps, a strategy we are pursuing toward the ultimate goals of removing lead and improving moisture tolerance of these materials.