Low pressure hybrid chemical vapor-assisted perovskite crystallization for efficient solar cells application
Ming-Hsien Li a, Yu-Hsien Chiang a, Jia-Shin Chen a, Po-Shen Shen a, Peter Chen a b
a Department of Photonics, National Cheng Kung University, No.1, University Rd. , Tainan, 701, Taiwan, Republic of China
b Research Center for Energy Technology and Strategy, National Cheng Kung University, No.1, University Rd. , Tainan, 701, Taiwan, Republic of China
nanoGe Perovskite Conferences
Proceedings of Perovskite Thin Film Photovoltaics (ABXPV16)
Barcelona, Spain, 2016 March 3rd - 4th
Organizers: Emilio Palomares and Nam-Gyu Park
Oral, Po-Shen Shen, presentation 027
Publication date: 14th December 2015

Tremendous progress has been made in hybrid organometal halide based perovskite thin film photovoltaics (PVs) in the past five years. As a promising material for low-cost photovoltaic technology, the power conversion efficiency (PCE) of hybrid organo-lead triiodide perovskite solar cells (PSCs) was rapidly boosted over 20 %. Nowadays, solution-processed spin-coating method is still the major approach to synthesize perovskite film for high efficiency PSCs. However, despite the extremely high device efficiency achieved by solution-processed approach, fabrication of large-area perovskite module for commercial purpose remained challenging with spin-coating process. Vapor-based deposition technique is considered as a promising approach for preparing high-quality and uniform perovskite thin film. With evolution from co-evaporation deposition to low-pressure vapor-assisted solution process, both energy budget and reaction yield for perovskite film fabrications have been improved. We applied low-pressure hybrid chemical vapor deposition (LPHCVD) method to fabricate CH3NH3PbI3 perovskite film. The crucial dependence of working pressure on the perovskite formation was revealed. Moreover, the reaction time plays an important role in controlling the quality of synthesized perovskite film. Efficient perovskite solar cells of 14.99 % and perovskite module (active area of 8.4 cm2) of 6.22 % are achieved by this LPHCVD method.



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