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Your search keyword '"Zhang, Wenfeng"' showing total 2 results
Start Over Author "Zhang, Wenfeng" Topic solar cells Publication Year Range This year
2 results on '"Zhang, Wenfeng"'

1. Surface Passivation of Perovskite by Hole‐Blocking Layer toward Efficient and Stable Inverted Solar Cells.

Author

Wang, Yandong, Zhao, Rongmei, Yu, Xin, Li, Liufei, Lin, Puan, Zhang, Shantao, Gao, Shuang, Li, Xinyu, Zhang, Wenfeng, Zhang, Wen‐Hua, and Yang, Shangfeng

Subjects
SURFACE passivation, PASSIVATION, SOLAR cells, FRONTIER orbitals, PHOTOVOLTAIC power systems, PEROVSKITE, ELECTRON transport
Abstract

Inverted (p‐i‐n) perovskite solar cells (PSCs) are advantageous in terms of easy fabrication, low‐temperature processibility, negligible hysteresis, and excellent compatibility with the tandem devices in comparison with the regular (n‐i‐p) counterparts. Hole‐blocking layer is crucial for efficient electron transport of inverted PSCs, and only a single hole‐blocking layer of bathocuproine (BCP) is used typically. Herein, bis[2‐(diphenylphosphino)phenyl] ether oxide (DPEPO) with a deep highest occupied molecular orbital (HOMO) energy level is incorporated atop of perovskite film as an auxiliary hole‐blocking layer, resulting in an enhanced electron transport of inverted PSC devices. The P=O group within DPEPO can coordinate with Pb2+ cations of perovskite, leading to passivation of surface defects of perovskite. Besides, incorporation of DPEPO hole‐blocking layer prohibits undesired hole transport from perovskite to PCBM electron transport layer (ETL), thus suppressing non‐radiative electron–hole recombination. As a result, combined with BCP hole‐blocking layer, inverted PSC devices based on double hole‐blocking layers exhibit a decent power conversion efficiency (PCE) of 24.17% with a high open‐circuit voltage (Voc) of 1.15 V which dramatically surpasses that based on single hole‐blocking layer (22.26%). Moreover, incorporation of hydrophobic DPEPO helps to improve the ambient and thermal stabilities of inverted PSC devices. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Recent progress in hydrogen: From solar to solar cell.

Author

Li, Yanlin, Ma, Zhu, Hou, Shanyue, Liu, Qianyu, Yan, Guangyuan, Li, Xiaoshan, Yu, Tangjie, Du, Zhuowei, Yang, Junbo, Chen, Yi, You, Wei, Yang, Qiang, Xiang, Yan, Tang, Shufang, Yue, Xuelin, Zhang, Meng, Zhang, Wenfeng, Yu, Jian, Huang, Yuelong, and Xie, Jiale

Subjects
SOLAR cells, CLEAN energy, PHOTOVOLTAIC power systems, SUSTAINABLE development, ENERGY development, CARBON offsetting, HYDROGEN as fuel, SOLAR energy
Abstract

• The important designs and exploration of several solar-water-splitting devices with excellent STH are highlighted. • Various solar-to-hydrogen conversion strategies are described. • Photovoltaic hydrogen production research and module progress. Hydrogen, meeting the requirements of sustainable development, is regarded as the ultimate energy in the 21st century. Due to the inexhaustible and feasible of solar energy, solar water splitting is an immensely promising strategy for environmental-friendly hydrogen production, which not only overcomes the fluctuation and intermittency but also contributes to achieving the mission of global "Carbon Neutrality and Carbon Peaking". However, there is still a lack of a comprehensive overview focusing on hydrogen progress with a discussion of development from solar energy to solar cells. Herein, we emphasize several solar-to-hydrogen pathways from the basic concepts and principles and focus on photovoltaic-electrolysis and photoelectrochemical/photovoltaic systems, which have achieved solar-to-hydrogen (STH) efficiency of over 10% and have extremely promising for large-scale application. In addition, we summarize the challenges and opportunities faced in this field including configuration design, electrode materials, and performance evaluation. Finally, perspectives on the potential commercial application and scientific research for the further development of solar-to-hydrogen are analyzed and presented. Hydrogen production holds great promise for meeting the requirements of sustainable development. Given that solar energy is an abundant and renewable source, it is imperative to develop environmentally friendly methods for water splitting. In this context, we provide an overview of recent advances in solar-to-hydrogen conversion, with a particular focus on solar cells, while also exploring key factors influencing the efficiency of solar-to-hydrogen (STH) conversion. Despite the importance of this topic, comprehensive reviews on solar-to-hydrogen are relatively scarce. We hope that our review will provide valuable insights and inspire the development of sustainable energy systems in the near future. [Display omitted] [ABSTRACT FROM AUTHOR]

Published
2024
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