High-throughput compositional mapping of triple-cation tin-lead perovskites for high-efficiency solar cells

被引：27
作者：
Gunasekaran, Rajendra Kumar [1 ]
Jung, Jina [1 ]
Yang, Sung Woong [1 ]
Yun, Jungchul [1 ]
Yun, Yeonghun [1 ]
Vidyasagar, Devthade [1 ]
Choi, Won Chang [1 ]
Lee, Chang-Lyoul [2 ]
Noh, Jun Hong [3 ]
Kim, Dong Hoe [4 ,5 ]
Lee, Sangwook [1 ,6 ]
机构：
[1] Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu, South Korea
[2] Adv Photon Res Inst APRI, Gwangju Inst Sci & Technol GIST, Gwangju, South Korea
[3] Korea Univ, Sch Civil Environm & Architectural Engn, Green Sch, Seoul, South Korea
[4] Korea Univ, Dept Mat Sci & Engn, Seoul, South Korea
[5] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea
[6] Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea
来源：
INFOMAT | 2023年 / 5卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
compositional engineering; mixed tin-lead iodides; narrow-bandgap perovskites; perovskite solar cells; strain relaxation; ternary phase mapping; IODIDE PEROVSKITES; STRAIN RELAXATION; PHASE; METHYLAMMONIUM; STABILITY; OXIDATION; VACANCIES; IMPACT; CESIUM; FILMS;
D O I：
10.1002/inf2.12393
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Mixed tin-lead perovskites suffer from structural instability and rapid tin oxidation; thus, the investigation of their optimal composition ranges is important to address these inherent weaknesses. The critical role of triple cations in mixed Sn-Pb iodides is studied by performing a wide range of compositional screenings over mechanochemically synthesized bulk and solution-processed thin films. A ternary phase map of FA (Sn0.6Pb0.4)I-3, MA(Sn0.6Pb0.4)I-3, and Cs(Sn0.6Pb0.4)I-3 is formed, and a promising composition window of (FA(0.6-x)MA(0.4)Cs(x))Sn0.6Pb0.4I3 (0 <= x <= 0.1) is demonstrated through phase, photoluminescence, and stability evaluations. Solar cell performance and chemical stability across the targeted compositional space are investigated, and FA(0.55)MA(0.4)Cs(0.05)Sn(0.6)Pb(0.4)I(3) with strain-relaxed lattices, reduced defect densities, and improved oxidation stability is demonstrated. The inverted perovskite solar cells with the optimal composition demonstrate a power conversion efficiency of over 22% with an open-circuit voltage of 0.867 V, which corresponds to voltage loss of 0.363 V, promising for the development of narrow-bandgap perovskite solar cells.
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页数：14
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