Inorganic perovskite/organic tandem solar cells with 25.1% certified efficiency via bottom contact modulation

IF 49.7 1区材料科学 Q1 ENERGY & FUELS

Nature Energy Pub Date : 2025-03-13 DOI:10.1038/s41560-025-01742-8

Yu Han, Jiehao Fu, Zhiwei Ren, Jiangsheng Yu, Qiong Liang, Zhihang Xu, Xiyun Xie, Dongyang Li, Ruijie Ma, Menghua Cao, Yonggui Sun, Chen Yang, Jiaqi He, Xiaoming Chang, Kuan Liu, Patrick W. K. Fong, Jiaming Huang, Heng Liu, Zhike Liu, Dongfang Xu, Lei Cheng, Jiyao Zhang, Guang Yang, Xinhui Lu, Ye Zhu, Qidong Tai, Qianqian Lin, Hanlin Hu, Yang Yang, Gang Li

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引用次数: 0

Abstract

Wide-bandgap perovskites in monolithic perovskite/organic tandem solar cells face challenges such as unregulated crystallization, severe defect traps, poor energetic alignment and undesirable phase transitions, primarily due to unfavourable bottom interfacial contact. These issues lead to energy loss and device degradation. In this Article, we synthesize acidic magnesium-doped tin oxide quantum dots to modulate the bottom interface contact in wide-bandgap CsPbI₂Br perovskite solar cells. This design balances physical, chemical, structural and energetic properties, passivating defects, optimizing energy band alignment, enhancing perovskite film growth and mitigating instability. We also elucidate the instability mechanism caused by alkaline-based tin oxide bottom contact, emphasizing the impact of the tin oxide solution’s acid/base properties on the stability and performance of the device. Consequently, the wide-bandgap CsPbI₂Br solar cell achieves a power conversion efficiency of 19.2% with a 1.44 V open-circuit voltage. The perovskite/organic tandem solar cell demonstrates an efficiency of 25.9% (certified at 25.1%), with improved stability under various conditions.

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来源期刊

Nature Energy Energy-Energy Engineering and Power Technology

CiteScore

75.10

自引率

1.10%

发文量

193

期刊介绍： Nature Energy is a monthly, online-only journal committed to showcasing the most impactful research on energy, covering everything from its generation and distribution to the societal implications of energy technologies and policies. With a focus on exploring all facets of the ongoing energy discourse, Nature Energy delves into topics such as energy generation, storage, distribution, management, and the societal impacts of energy technologies and policies. Emphasizing studies that push the boundaries of knowledge and contribute to the development of next-generation solutions, the journal serves as a platform for the exchange of ideas among stakeholders at the forefront of the energy sector. Maintaining the hallmark standards of the Nature brand, Nature Energy boasts a dedicated team of professional editors, a rigorous peer-review process, meticulous copy-editing and production, rapid publication times, and editorial independence. In addition to original research articles, Nature Energy also publishes a range of content types, including Comments, Perspectives, Reviews, News & Views, Features, and Correspondence, covering a diverse array of disciplines relevant to the field of energy.