2023 Fiscal Year Final Research Report
Efficiency and durability enhancement of solar cells using lead-free high dimensional halide perovskite materials
| Project/Area Number |
19H05636
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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| Allocation Type | Single-year Grants |
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| Review Section |
Broad Section E
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| Research Institution | Toin University of Yokohama |
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Principal Investigator |
Miyasaka Tsutomu 桐蔭横浜大学, 医用工学部, 特任教授 【東京大学先端科学技術研究センター・フェロー】 (00350687)
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| Co-Investigator(Kenkyū-buntansha) |
近藤 高志 東京大学, 先端科学技術研究センター, 教授 (60205557)
早瀬 修二 電気通信大学, i－パワードエネルギー・システム研究センター, 特任教授 (80336099)
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| Project Period (FY) |
2019-06-26 – 2024-03-31
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| Keywords | ペロブスカイト太陽電池 / 光電変換 / 晶析 / 真空蒸着 / 鉛フリー / スズ / ビスマス / ダブルペロブスカイト |
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| Outline of Final Research Achievements |
Thin films of metal halide perovskite with a three-dimensional crystal structure in which lead is replaced with harmless metal cations such as Ag, Bi, Sn, and Ti are formed by solution process and vacuum deposition methods, and their optical properties are evaluated. Photovoltaic deviced using theselead-free perovskite films are fabricated for evaluation of power conversion efficiency (PCE). Among Ag-Bi materials, a PCE of 2.7% was obtained with a thin film of Ag2BiI5, and an efficiency of over 4% was obtained with the double perovskite Cs2AgBiBr6. In addition, as a new development, AgBiS2, which replaced halogen with sulfur, achieved an efficiency of more than 5%. Sn-based perovskites phootovoltaic cells were fabricated using a passivation method to suppress the oxidation of divalent Sn and the best cell achieved a high efficiency of 11.4%.
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| Free Research Field |
光電気化学、ペロブスカイト太陽電池
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| Academic Significance and Societal Importance of the Research Achievements |
この研究成果をもとに、鉛を用いない組成によって環境に無害であり、かつ溶液塗布法を用いて成膜する安価なペロブスカイト光電変換素子が11%以上の高いエネルギー変換効率の性能をもって得られる。これによってペロブスカイト光電変換素子を屋外の太陽光発電に用いる応用から屋内のIoT電源として使う応用まで、社会実装における用途範囲が拡大し、環境上安全で安価な太陽電池が普及することで脱炭素社会への構築に貢献する。
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