Redox Shuttle-Stabilized Tin–Lead Perovskites for All-Perovskite Tandem Solar Cells
Year: 2025
Type: article
Abstract: Tin–lead (Sn–Pb) mixed perovskite solar cells (PSCs) emerge as essential subcells for all-perovskite tandem devices. However, their efficiency and stability are compromised by the facile oxidation of Sn 2+ to Sn 4+ and substantial defect density. In this work, we introduced tris(2-carboxyethyl) phosphine (TCEP) as a redox shuttle to accelerate the redox-reaction-enabled self-healing of Sn–Pb perovskite to recover its original state under illumination. Meanwhile, TCEP can regulate the crystallization kinetics due to the coordination interaction with metal cations, markedly enhancing the film quality. Benefiting from the multifunctionality of TCEP, the champion single-junction Sn–Pb PSC delivers an improved power conversion efficiency (PCE) of 23.86% while maintaining 90% of its initial PCE after 563 h of maximum power point tracking (MPPT) under illumination. Moreover, the all-perovskite tandem cell with TCEP exhibits a champion PCE of 28.86% and retains 80% of its initial PCE after 1000 h under continuous illumination.
Source: ACS Energy Letters
Authors: Chengjian Yuan, Mingqian Chen, Deng Wang, Jie Zeng, Jiarong Wang, Xiaofeng Huang, Kai-kai Liu, Tao Shen, Xia Lei, Ziyao Yue, Yiran Hao, Sai-Wing Tsang, Qin Hu, Baomin Xu, Alex K.-Y. Jen
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Funders: Environment and Ecology Bureau, United Nations Educational, Scientific and Cultural Organization, City University of Hong Kong, Aromatic Plant Research Center, Research Grants Council, University Grants Committee, Innovation and Technology Commission, University of Science and Technology of China, Southern University of Science and Technology
Awards: Molecular Engineering of 1D Hybrid Perovskites for Improving the Performance and Stability of Metal Halide Perovskite Solar Cells, G2076617200, G2352556883, G246088184, G269063593, Development of Commercializable Perovskite-Organic Tandem Solar Cells with High Efficiency and Stability, G2755695991, G2795506979, Development of Efficient and Stable Perovskite Solar Cell with Safe-to-Use, G2945652241, G3686599914, G3870929676, G4025736820, G402712756, G4557219845, G4569000175, G4784552085, Rational Design and Synthesis of a New Class of Non-Fullerene Acceptors and Matched Donor Polymers for Highly Efficient Organic Photovoltaics, G5345976313, G5536098024, G6505287937, G7114715805, G7833963490, G7879318352, G800496194, G8471323164, G8510613004, G8674577836, Development of Multifunctional Redox Mediators to Mitigate Halide Segregation in Wide-Bandgap Perovskites for Perovskite Based Tandem Solar Cells, Innovative Technology and Critical Materials for Developing Flexible Tandem Solar Cells with Ultra-high Specific Power
OpenAlex ID: W4414023715