Speakers

Prof. Yabing QI is Professor and Unit Director of Energy Materials and Surface Sciences Unit at Okinawa Institute of Science and Technology Graduate University in Japan. He received his B.S., M.Phil., and Ph.D. from Nanjing University, Hong Kong University of Science and Technology, and UC Berkeley, respectively. His research interests include surface / interface sciences, perovskite solar cells, lithium batteries, and organic electronics (https://groups.oist.jp/emssu).

Surface Science Studies on Metal Halide Perovskite Materials and their Solar Cell Applications

Abstract

Metal halide perovskite materials and their versatile applications have continued to attract immense attention from both academia and industry. In particular, perovskite-based solar cells have been considered a promising candidate for next-generation photovoltaic technology. In these solar cell devices, surfaces and interfaces play a pivotal role. My group at OIST has been utilizing surface science and advanced material characterization to obtain in-depth understanding about perovskite materials. In this talk, I will present our research progress on surface science studies on perovskite materials [1-4]. Also, I will briefly discuss about a few examples to illustrate how to utilize these surface science findings in perovskite solar cell device applications [5-7].

References

1. R. Ohmann, L. K. Ono, H.-S. Kim, H. Lin, M. V. Lee, Y. Li*, N.-G. Park*, Y. B. Qi*, “Real-Space Imaging of the Atomic Structure of Organic–Inorganic Perovskite”, J. Am. Chem. Soc. 137, 16049 (2015).
2.  J. Hieulle, X. Wang, C. Stecker, D.-Y. Son, L. Qiu, R. Ohmann, L. K. Ono, A. Mugarza, Y. Yan*, Y.  B.  Qi*, “Unraveling the Impact of Halide Mixing on Perovskite Stability”, J. Am. Chem. Soc. 141, 3515 (2019).
3.  A. Jamshaid, Z. Guo, J. Hieulle, C. Stecker, R. Ohmann, L. K. Ono, L. Qiu, G. Tong, W. Yin*, Y. B. Qi*, “Atomic-scale Insight into Enhanced Surface Stability of Methylammonium Lead Iodide Perovskite by Controlled Deposition of Lead Chloride”, Energy Environ. Sci. 14, 4541 (2021).
4. C. Stecker, K. Liu, J. Hieulle, R. Ohmann, Z. Liu, L. K. Ono, G. Wang*, Y. B. Qi*, “Surface Defect Dynamics in Organic–Inorganic Hybrid Perovskites: From Mechanism to Interfacial Properties”, ACS Nano 13, 12127 (2019).
5. Z. Liu, L. Qiu, E. J. Juarez-Perez, Z. Hawash, T. Kim, Y. Jiang, Z. Wu, S. R. Raga, L. K. Ono, S. Liu, Y. B. Qi*, “Gas-solid reaction based over one-micrometer thick stable perovskite films for efficient solar cells and modules”, Nat. Commun. 9, 3880 (2018).
6. Z. Liu, L. Qiu, L. K Ono, S. He, Z. Hu, M. Jiang, G. Tong, Z. Wu, Y. Jiang, D.-Y. Son, Y. Dang, S. Kazaoui, Y. B. Qi*, “A holistic approach to interface stabilization for efficient perovskite solar modules with over 2,000-hour operational stability”, Nat. Energy 5, 596 (2020).
7. T. Bu, L. K. Ono, J. Li, J. Su, G. Tong, W. Zhang, Y. Liu, J. Zhang, J. Chang, S. Kazaoui, F. Huang, Y.-B. Cheng, Y. B. Qi*, “Modulating crystal growth of formamidinium-caesium perovskites for over 200 cm2 photovoltaic sub-modules”, Nature Energy 7, 528 (2022).