Preparation of 2D/3D Hybrid Perovskite Films Via Low Pressure Vapor Assisted Solution Process and its Optical Characterization
Itaru Raifuku a, Ming-Hsien Li a, Yu-An Chen a, Peter Chen a b
a Department of Photonics, National Cheng Kung University, No.1, University Rd. , Tainan, 701, Taiwan, Republic of China
b Hierachical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP20)
Tsukuba-shi, Japan, 2020 January 20th - 22nd
Organizers: Michio Kondo and Takurou Murakami
Poster, Itaru Raifuku, 096
Publication date: 14th October 2019

Perovskite solar cells have attracted much attention due to its high power conversion efficiency, solution processability, tunable bandgap, tunable the material composition, and so on. The power conversion efficiency of perovskite solar cells reached 25.2%, which is comparable to crystalline silicon solar cells. Moreover, because of perovskite solar cells can work under low illuminance conditions such as under indoor lightings, various kinds of applications are expected. However, stability issue is still remaining to commercialize perovskite solar cells. 2D perovskite materials, which employing large-sized cations, are promising candidate to overcome the stability issue. In this study, we fabricated 2D/3D hybrid perovskite materials by reacting PEAI/PbI2 (PEAI: phyanylethylammonium iodide) mixture with MAI (methylammonium iodide) vapor under low pressure condition and evaluated the film by several characterization methods. From photoluminescence spectroscopy, we revealed that the resulted films contain several compositions of low dimensional perovskites. Detailed characterization of the 2D/3D hybrid perovskite films will be presented at the conference.

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