Halide Perovskite Photovoltaics and X-ray Imaging
Nam-Gyu Park a
a Sungkyunkwan University, South Korea, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440, Korea, Republic of
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics 2018 (AP-HOPV18)
Kitakyūshū-shi, Japan, 2018 January 28th - 30th
Organizers: Shuzi Hayase, Juan Bisquert and Hiroshi Segawa
Keynote, Nam-Gyu Park, presentation 071
DOI: https://doi.org/10.29363/nanoge.ap-hopv.2018.071
Publication date: 27th October 2017

Since the first report on the solid-state perovskite solar cell with power conversion efficiency (PCE) of 9.7% and 500 h-stability in 2012 by our group, its certified PCE now reaches 22.1%. It is believed that perovskite solar cell is promising next-generation photovoltaics due to superb performance and very low cost. Although high photovoltaic performance was achieved, there are some issues to be addressed. Current-voltage hysteresis is critical because hysteresis can cause instability of perovskite material. In this talk, material and interfacial emerging are introduced to remove hysteresis and thereby improve stability. Doping is found to be effective way in reducing defect. Universal approach toward hysteresis-free perovskite solar cell will be discussed in detail. Organic-inorganic halide perovskite is found to be highly useful material for low-dose, high resolution X-ray imaging. Multicrystalline perovskite crystal (MPC) with enhanced (100) planes was prepared by solution chemistry. We demonstrated 10 by 10 cm2 X-ray imaging using MPC with TFT backplane.

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