MICROPARTICULATED PEROVSKITE FILM AND FUNCTIONAL ELEMENT USING THE SAME

PROBLEM TO BE SOLVED: To provide a perovskite type crystal film for use in a photovoltaic material of a hybrid thin-film solar cell that is microparticulated into a nanolevel and has high functionality.SOLUTION: The microparticulated perovskite film is produced by coating and drying a solution prepared by dissolving a precursor substance producing a perovskite crystal and an ionic liquid in a solvent. The precursor substance is a mixture of halogenated alkyl amine and a halogenated metal; the ionic liquid is an imidazolium salt; and the solvent is an amide-based solvent. The method for producing a microparticulated perovskite film produces a crystal film having higher functionality with largely changed optical characteristics or the like as compared with the conventional perovskite film while the ionic liquid suppresses the rapid volatilization of the solvent by adding the ionic liquid to the solution having the precursor substance dissolved in the solvent.SELECTED DRAWING: Figure 1 【課題】ハイブリット型の薄膜太陽電池の光発電材料に用いるナノレベルに微粒子化された機能性の高いペロブスカイト型結晶膜の提供。【解決手段】ペロブスカイト型結晶を生成する前駆体物質とイオン液体とを溶媒に溶解した溶液を塗布及び乾燥することで得られる、微粒子化ペロブスカイト膜。前駆体物質はハロゲン化アルキルアミンとハロゲン化金属の混合物、イオン液体はイミダゾリウム塩、溶媒はアミド系溶媒である。前駆体物質を溶媒に溶解した溶液にイオン液体を加えることで、このイオン液体が溶媒の急激な揮発するのを抑えつつ、従来のペロブスカイト結晶膜に比較して光学特性等が大きく変化した機能性の高い結晶膜となる微粒子化ペロブスカイト膜の製造方法。【選択図】図１