大氣環境中以二步法合成鈣鈦礦之研究

Study on Synthesis of Perovskite by Two-step Method in an Atmospheric Environment

王行達(Shing-Dar Wang)

《臺灣鑛業》 75卷1期 (2023/03) Pp. 14-20

摘要

本研究在大氣環境下製作鈣鈦礦薄膜。先將碘化鉛／二甲基甲醯胺溶液滴在面積為2x1.5公分的ITO玻璃上，在100℃的加熱板上短暫加熱後進行旋轉塗佈，並在100℃的加熱板上持溫1小時得到均勻碘化鉛薄膜。使用高速旋轉塗佈法、滲透／低速旋轉法、蒸發法三種方式，使甲基碘化銨與碘化鉛反應製作鈣鈦礦薄膜。滲透／低速旋轉法的試片之底部中間區域可以得到黑色鈣鈦礦。高速旋轉塗佈法及蒸發法試片之底部區域無法得到黑色鈣鈦礦，可能的原因是甲基銨離子彼此間的排斥力。在80℃時效1天的滲透／低速旋轉法，可使整個試片（包括底部區域）完全轉化成黑色鈣鈦礦。

關鍵字

鈣鈦礦 ； 甲基碘化銨 ； 碘化鉛 ； 旋轉塗佈

並列摘要

In this study, perovskite thin films were fabricated in an atmospheric environment. The lead iodide/dimethylformamide solution was dropped on the ITO glass with a size of 2 cm*1.5 cm and heated briefly on a 100℃ hot plate. Then spin-coating was conducted. A uniform lead iodide film was obtained after heat treatment at 100℃ for 1 hour on a hot plat. The perovskite film was prepared by reacting methylammonium iodide and lead iodide by high-speed spin coating method, infiltration/low-speed spin method and evaporation method. Black perovskite can be obtained in the middle of the bottom of the specimen by the infiltration/low-speed spin method. The black perovskite cannot be obtained at the bottom of the specimen by the high-speed spin coating method and the evaporation method. The possible reason is the repulsion between methylammonium ions. The specimen prepared by the infiltration/low-speed spin method aging at 80℃ for 1 day can be completely converted into black perovskite, including the bottom of the specimen.

並列關鍵字

perovskite ； methylammonium iodide ； lead iodide ； spin coating