Dewei Zhao

Perovskite & Organic devices

Institute of Solar Energy Materials and Devices College of Materials Science and Engineering Sichuan University, Chengdu, China

Email: dewei.zhao@scu.edu.cn

Biography

Dewei Zhao received his Ph.D. degree from Nanyang Technological University, Singapore. From 2012–2018, he worked as a Postdoc Associate at University of Michigan and University of Florida and a Research Assistant Professor at The University of Toledo. Currently, he has been a professor in Institute of Solar Energy Materials and Devices, College of Materials Science and Engineering at Sichuan University, China. He has been awarded Chinese Government Award for Outstanding Self-Finance Students Abroad” (2011, China), and “Green Talents Competition 2010” (BMBF, Germany). He has contributed over 100 publications in journals of Nat. Energy (3), Science (3), Joule (2), Adv. Mater. (2), Adv. Energy Mater. (3), etc. His recent research interest focuses on organic/inorganic hybrid optoelectronic devices and characterizations, such as thin-film solar cells, light-emitting diodes, and photodetectors.

Abstract for Presentation

Efficient Low-Bandgap Mixed Tin-Lead Perovskite and All-Perovskite Tandem Solar Cells

Tandem solar cells using all metal-halide perovskite thin films show great promise for next-generation solar cells in terms of reduced cost, flexibility, and high efficiency, an effective way to break the Shockley-Queisser limit of single-junction cells. Low-bandgap mixed tin (Sn)-lead (Pb) perovskite solar cells, as a key to make highly efficient all-perovskite tandem solar cells, have been gaining extensive interest due to their appropriate bandgaps and promising application to build efficient all-perovskite tandem cells. Growth process of perovskites plays a crucial role in the formation of high-quality perovskites. Here, we will present a universal preparation strategy that increases grain size, enhances crystallinity, and prolongs carrier lifetimes in low-bandgap and wide-bandgap perovskite films. High-quality perovskite absorber layers are obtained with slowed solvent releasing process, enabling fabrication of efficient single-junction perovskite solar cells and all-perovskite tandem solar cells. Our work offers a promising and effective approach to achieve efficient single-junction cells and multi-junction tandem solar cells.

References

[1] Rui He, Shengqiang Ren*, Cong Chen*, Zongjin. Yi, Yi Luo, Huagui Lai, Wenwu Wang, Guanggen Zeng, Xia Hao, Ye Wang, Jingquan Zhang, Changlei Wang, Lili Wu, Fan Fu*, Dewei Zhao*, Energy Environ. Sci., 14 (2021) 5723-5759.

[2] Qiyu Chen,† Jincheng Luo,† Rui He, Huagui Lai, Shengqiang Ren,* Yiting Jiang, Zhenxi Wan, Wenwu Wang, Xia Hao, Ye Wang, Jingquan Zhang, Iordania Constantinou, Changlei Wang, Lili Wu, Fan Fu,* Dewei Zhao*, Adv. Energy Mater, 11 (2021) 2101045.

[3] Chongwen Li, Zhaoning Song,* Cong Chen, Chuanxiao Xiao, Biwas Subedi, Steven P. Harvey, Niraj Shrestha, Kamala Khanal Subedi, Lei Chen, Dachang Liu, You Li, Yong-Wah Kim, Chun-sheng Jiang, Michael J. Heben, Dewei Zhao, Randy J. Ellingson, Nikolas J. Podraza, Mowafak Al-Jassim and Yanfa Yan*, Nat. Energy, 5 (2020) 768–776

[4] Dewei Zhao*, Cong Chen, Changlei Wang, Maxwell M. Junda, Zhaoning Song, Corey R. Grice, Yue Yu, Chongwen Li, Biwas Subedi, Nikolas J. Podraza, Xingzhong Zhao, Guojia Fang, Ren-Gen Xiong, Kai Zhu, Yanfa Yan*, Nat. Energy, 3(12) (2018) 1093.

[5] Dewei Zhao*, Yue Yu, Changlei Wang, Weiqiang Liao, Niraj Shrestha, Corey R. Grice, Alexander J. Cimaroli, Lei Guan, Randy J. Ellingson, Kai Zhu, Xingzhong Zhao, Ren-Gen Xiong, and Yanfa Yan*, Nat. Energy, 2 (2017) 17018.