D-bar Coating and Bi-facial Stamping Approaches for Scalable Perovskite Solar Cells
Nam-Gyu Park a
a Sungkyunkwan University, Suwon 16419, Korea
nanoGe Perovskite Conferences
Proceedings of nanoGe International Conference on Perovskite Solar Cells, Photonics and Optoelectronics (NIPHO19)
International Conference on Perovskite Thin Film Photovoltaics
Jerusalem, Israel, 2019 February 24th - 27th
Organizers: Lioz Etgar and Kai Zhu
Invited Speaker, Nam-Gyu Park, presentation 043
DOI: https://doi.org/10.29363/nanoge.nipho.2019.043
Publication date: 21st November 2018

Since the first report on the high efficiency, stable solid-state perovskite solar cell (PSC) in 2012 by our group, following two seed works on perovskite-sensitized liquid junction solar cells in 2009 and 2011, perovskite photovoltaics have been triggered. AS a result, PSC demonstrated its power conversion efficiency (PCE) of 23.3% in 2018. According to Web of Science, publications on PSC increase exponentially since 2012 and total number of publications reaches already over 10,000 as of October 2018, which is indicative of a paradigm shift in photovoltaics. Although small area cell exhibited superb efficiency surpassing the performance of thin film technologies, scale-up technology is required toward commercialization. In addition, further higher efficiency toward Shockley–Queisser limit is required in parallel. In this talk, Large-area D-bar coating technology is introduced using perovskite cluster embedded coating solution, followed by brief introduction on history of perovskite solar cell. Bi-facial stamping method was developed for not only scale-up technique but also interface modification and low-temperature phase stabilization. For higher efficiency in large-area PSC, managing recombination is critical. Current-voltage hysteresis is also discussed because hysteresis is related to the stability of perovskite solar cell. Methodologies reducing recombination were developed via interface and bulk engineering.

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