Proceedings of MATSUS Fall 2023 Conference (MATSUSFall23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.159
Publication date: 18th July 2023
Perovskite solar cells attract attention as promising cost-effective next generation printable photovoltaics.
The power conversion efficiencies (PCEs) have been substantially increased in a short period, based on the improvements of the fabrication protocols for the perovskite layer, and the development of new materials for passivation of the surface or efficient charge collection, etc.
Our research approaches for lead and lead-free perovskite solar cells are as follows.
1) Development of highly purified perovskite precursor materials: We synthesis a series of complexes of lead halides or tin halides as purified precursor for perovskite materials.
2) Development of fabrication methods for perovskite layer by solution process: We focus on the intermediates formed during the solution process and develop efficient fabrication methods [1-3] including surface passivation based on the mechanism.[4-7]
3) Development of organic semiconductors as efficient charge-collection materials from perovskite layer: We design and synthesis novel pi-conjugated materials, including PATAT,[8] in terms of control of the energy level of frontier orbitals, molecular orientation, and interface between perovskite layer.
In this talk, our recent progress on Sn-based perovskite solar cells as well as Pb-based perovskites will be introduced.
This work was conducted with many students, researchers, and collaborators, including Dr. Richard Murdey, Dr. Tomoya Nakamura, Dr. Minh Anh Truong, Dr. Ryuji Kaneko, Dr. Shuaifeng Hu, Dr. Jorge Pascual Mielgo, Dr. Joel A. Smith, Prof. Yoshihiko Kanemitsu, and Prof. Henry J. Snaith, etc. This work was partially supported by JST–ALCA (JPMJAL1603) and JST–COI (JPMJCE1307) programs, NEDO, JST-Mirai Program (JPMJMI22E2), International Collaborative Research Program of ICR, Kyoto University, ICR Grants for Promoting Integrated Research, Kyoto University, grants for the Integrated Research Consortium on Chemical Sciences, and Grant-in-Aid for Scientific Research (A) (21H04699).