Direct conversion to MAPbI3 perovskite phase from PbI2 and MAI vapor by hot-wall method
Satoru Seto a, Yoshihiro Arima a, Haruna Yamashita a, Satoru Yamada a
a National Institute of Technology, Ishikawa College, Tsubata, Kahoku Ishikawa 929-0392, Japan
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of International Conference on Perovskite and Organic Photovoltaics and Optoelectronics (IPEROP19)
Kyōto-shi, Japan, 2019 January 27th - 29th
Organizers: Hideo Ohkita, Atsushi Wakamiya and Mohammad Nazeeruddin
Poster, Satoru Seto, 104
Publication date: 23rd October 2018

Fabrication of organo-metal halide perovskite films for solar cells is classified into two methods: solution method and vapor phase method. Among the vapor phase methods, high-efficient perovskite solar cells by dual source vacuum evaporation have been reported [1]. However, it is known that the vapor pressure of methylammonium iodide (MAI) is difficult to control in the vapor phase method. We report here a novel vapor deposition technique based on the hot-wall method to convert two source materials (MAI and PbI2) into perovskite phase. Our equipment is specially designed for direct growth of perovskite films in a vacuum chamber. Using this equipment, we have successfully deposited CH3NH3PbI3 (MAPbI3) perovskite films at low substrate temperature of 40°C. In the presentation, structural characterization by X-ray diffraction and surface morphology by AFM on the deposited films will be presented. In addition, a preliminary result of inverted planar heterojunction solar cells using the deposited perovskite films will also be presented.

This study was financially supported by the Iwatani Naoji Foundation.

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