High-performance all-inorganic perovskite/crystalline silicon tandem solar cells
Final Report Abstract
Global energy crisis is one of the biggest global challenges facing humankind in the 21st century. Photovoltaics (PV) are playing a major role in providing clean electrical energy as part of the future renewables-based energy mix. At present, crystalline silicon (c-Si) solar cells dominate the global PV market with a market share >95%. However, the c-Si solar cells are still high in terms of cost compared with traditional fossil energy. Driven by the cost effectiveness, one main solution to this dilemma is to develop high-performance perovskite/c- Si tandem cells, which is a feasible way to increase cell efficiency far beyond the limit of single-junction solar cells with affordable cost. This is mainly attributed to the unique merits of perovskites and fast research progress for perovskite solar cells since 2009. This Sino-German joint research project aims at gaining the knowledge about mechanism understanding on the perovskite/c-Si tandem solar cells and thereby achieving highperformance perovskite/crystalline silicon tandem solar cells. Four investigations were conducted in the present project with finding results: (i) Experimental determination of complex optical constants of air stable inorganic CsPbI3 perovskite thin films; (ii) Determination of complex optical constants and photovoltaic device design of all-inorganic CsPbBr3 perovskite thin films; (iii) Toward high efficiency for long-term stable Cesium doped hybrid perovskite solar cells via effective light management strategy; (iv) An novel quasi-2D perovskite was incorporated with fluorinated additive for efficient and stable four-terminal tandem solar cells. Finally, four-terminal perovskite/silicon tandem solar cells were successfully prepared, where the quasi-2D Cs0.17FA0.83Pb(I0.83Br0.17)3 was used for semitransparent perovskite solar cell via a one-step anti-solvent process, and the PERC silicon solar cells were used. An overall PCE of 23.53% with favorable device stability was achieved. The device without encapsulation maintains 90.7% of the initial PCE after 1000 h under continuous heating at 60 °C and simultaneous exposure to humid air with a relative humidity of 60%. All of the above research results have been presented in journal papers. This project helps to tackle the intractable issue regarding the intrinsic thermal and moisture instability of the perovskite materials and provides a novel prototype design for future tandem solar cells for all seasons.
Publications
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Determination of complex optical constants and photovoltaic device design of all-inorganic CsPbBr3 perovskite thin films. Optics Express, 28(10), 15706.
Yan, Wensheng; Mao, Lingyun; Zhao, Peiyang; Mertens, Adrian; Dottermusch, Stephan; Hu, Hang; Jin, Zhong & Richards, Bryce S.
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Experimental Determination of Complex Optical Constants of Air‐Stable Inorganic CsPbI3 Perovskite Thin Films. physica status solidi (RRL) – Rapid Research Letters, 14(6).
Yan, Wensheng; Guo, Yi; Beri, Deski; Dottermusch, Stephan; Chen, Haining & Richards, Bryce S.
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Toward high efficiency for long-term stable Cesium doped hybrid perovskite solar cells via effective light management strategy. Journal of Power Sources, 510, 230410.
Yan, Wensheng; Liu, Liu; Li, Wangnan; Wu, Zhengli; Zang, Yue; Wang, Yu; Liu, Ke; Chen, Meihua & Zhong, Zhicheng
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Organic-Inorganic Hybrid Quasi-2d Perovskites Incorporated with Fluorinated Additive for Efficient and Stable Four-Terminal Tandem Solar Cells. SSRN Electronic Journal.
Xia, Yuren; Zhu, Mengfei; Qin, Lina; Zhao, Cheng; Hong, Daocheng; Tian, Yuxi; Yan, Wensheng & Jin, Zhong
