Achieving a high open-circuit voltage of 1.339 V in 1.77 eV wide-bandgap perovskite solar cells via self-assembled monolayers

Literature Information

Publication Date 2023-11-10
DOI 10.1039/D3EE02839A
Impact Factor 38.532
Authors

Zongjin Yi, Rui He, Jingwei Zhu, Wenbo Jiao, Yi Luo, Yuliang Xu, Yunfan Wang, Zixin Zeng, Kun Wei, Jinbao Zhang, Sai-Wing Tsang, Cong Chen, Dewei Zhao


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Abstract

Severe open-circuit voltage (VOC) loss significantly hinders the performance improvement of wide-bandgap (WBG) perovskite solar cells (PSCs) and their application in perovskite-based tandem devices. Herein, we develop a novel self-assembled monolayer of (4-(5,9-dibromo-7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (DCB-BPA) as the hole-selective layer for WBG PSCs with a 1.77 eV perovskite absorber. DCB-BPA facilitates the subsequent growth of WBG perovskite with improved buried-interface quality. Compared with that of poly(triarylamine) PTAA-based control devices, a substantially enhanced average VOC from 1.18 V to 1.31 V of DCB-BPA-based devices has been realized due to reduced interfacial nonradiative recombination and enhanced energy level alignment. Our certified device delivers an impressive VOC of up to 1.339 V and a power conversion efficiency (PCE) of 18.88%, corresponding to a very low VOC loss of 431 mV (with respect to the bandgap). This enables us to fabricate efficient 4-terminal all-perovskite tandem solar cells with a PCE of 26.9% by combining with a 1.25 eV low-bandgap PSC, demonstrating the promising application of DCB-BPA in tandem devices.

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Energy & Environmental Science

Energy & Environmental Science
CiteScore: 32.34
Self-citation Rate: 3.4%
Articles per Year: 481

Energy & Environmental Science is an international journal dedicated to publishing exceptionally important and high quality, agenda-setting research tackling the key global and societal challenges of ensuring the provision of energy and protecting our environment for the future. The scope is intentionally broad and the journal recognises the complexity of issues and challenges relating to energy conversion and storage, alternative fuel technologies and environmental science. For work to be published it must be linked to the energy-environment nexus and be of significant general interest to our community-spanning readership. All scales of studies and analysis, from impactful fundamental advances, to interdisciplinary research across the (bio)chemical, (bio/geo)physical sciences and chemical engineering disciplines are welcomed. Topics include, but are not limited to, the following: Solar energy conversion and photovoltaics Solar fuels and artificial photosynthesis Fuel cells Hydrogen storage and (bio) hydrogen production Materials for energy systems Capture, storage and fate of CO2, including chemicals and fuels from CO2 Catalysis for a variety of feedstocks (for example, oil, gas, coal, biomass and synthesis gas) Biofuels and biorefineries Materials in extreme environments Environmental impacts of energy technologies Global atmospheric chemistry and climate change as related to energy systems Water-energy nexus Energy systems and networks Globally applicable principles of energy policy and techno-economics

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