Chief Researcher, Photovoltaic Materials Group
National Institute for Materials Science (NIMS), Japan;
E-mail: [email protected]
Title:
Organic-Inorganic Hybrid Perovskite Solar Cell for Next Generation Photovoltaics
Abstract:
Perovskite solar cells (PSCs) containing hybrid organic-inorganic metal halide perovskite material have attracted large attention due to the meteoric rise in their solar to electric power conversion efficiency (PCE) since 2009 [1,2]. With in a short amount of time, perovskite solar cells have become one of today's most promising up-and-coming photovoltaic technologies [3]. We used heavily doped inorganic charge extraction layers in planar PSCs to achieve very rapid carrier extraction avoiding pinholes and eliminating local structural defects over large areas. This robust inorganic nature allowed us for the fabrication of PSCs showing hysteresis free I-V characteristics with high stability [4-5]. Hysteresis in the I-V characteristics was eliminated; the PSCs were stable: >90% of the initial PCE remained after 1000 hours light soaking. Recently, we have proposed a graded heterojunction structure (GHJ) to enhance the performance of inverted-PSCs. It improves the photoelectron collection and reduces recombination loss of the perovskites. We achieved a high efficiency of over 22%. Recently, Sn-based perovskite solar cells (PSCs) have attracted much attention as an alternative of toxic Pb-based PSCs [6-7].
References:
[1] A. Kojima, Tsutomu Miyasaka, et al.; J. Am. Chem. Soc. 131 (2009) 6050-6051.
[2] Hui-Seon Kim, Michael Gr�tzel, Nam-Gyu Park, et al.; Sci. Rep. 2 (2012) 591.
[3] Jeong, J.; Hagfeldt, A.; Kim, D.; Gr�tzel, M.; Kim, J. Nature 2021, 592, 381-385.
[4] W. Chen, A. Islam, M. Gr�tzel, L. Han, et al., Science, 350, (2015) 944-948.
[5] Y. Wu, A. Islam and L. Han, et al.; Nature Energy 1: 16148 (2016);
[6] Kayesh, M. E.; Islam, A., et al.; Small 2024, 2402896. DOI: 10.1002/smll.202402896
[7] Karim, M. A.; Islam, A., et al.; Solar Energy 2024; DOI: 10.1016/j.solener.2024.112761
Biography:
Dr. Ashraful Islam started his career with the Atomic Energy Commission in Bangladesh. Dr. Islam completed his PhD at the University of Osaka. After completing his PhD, he worked at various Japanese research institutes. He was a professor at the University of Tsukuba, a senior researcher at Sharp Corporation, and a member of various renowned organizations. His aim at NIMS is to construct the next generation of low-cost solar cells, including dye-sensitized and perovskite solar cells. Dr. Ashraful has published about 215 peer-reviewed papers with a total citation of about 16,000 and possesses many patents. Presently, he is the chief researcher at NIMS.