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Origins of High Performance and Degradation in the Mixed Perovskite Solar Cells

机译：混合钙钛矿太阳能电池高性能和降解的起源

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摘要

The origins of the high device performance and degradation in the air are the greatest issues for commercialization of perovskite solar cells. Here this study investigates the possible origins of the mixed perovskite cells by monitoring defect states and compositional changes of the perovskite layer over the time. The results of deep-level transient spectroscopy analysis reveal that a newly identified defect formed by Br atoms exists at deep levels of the mixed perovskite film, and its defect state shifts when the film is aged in the air. The change of the defect state is originated from loss of the methylammonium molecules of the perovskite layer, which results in decreased J(SC), deterioration of the power conversion efficiency and long-term stability of perovskite solar cells. The results provide a powerful strategy to diagnose and manage the efficiency and stability of perovskite solar cells.
机译：器件性能高和空气中降解的根源是钙钛矿太阳能电池商业化的最大问题。在这里，本研究通过监测缺陷状态和钙钛矿层随时间变化的成分，研究了混合钙钛矿细胞的可能来源。深层瞬态光谱分析的结果表明，在混合钙钛矿薄膜的深层存在一个新发现的由溴原子形成的缺陷，当该薄膜在空气中老化时，其缺陷状态会发生变化。缺陷状态的变化源自钙钛矿层的甲基铵分子的损失，其导致J（SC）降低，功率转换效率的劣化和钙钛矿太阳能电池的长期稳定性。结果为诊断和管理钙钛矿型太阳能电池的效率和稳定性提供了强有力的策略。

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  • 来源
    《Advanced Materials》 |2019年第8期|1805438.1-1805438.5|共5页
  • 作者

    Heo Sung; Seo Gabseok; Lee Yonghui; Seol Minsu; Kim Seong Heon; Yun Dong-Jin; Kim Yongsu; Kim Kihong; Lee Junho; Lee Jooho; Jeon Woo Sung; Shin Jai Kwang; Park Jucheol; Lee Dongwook; Nazeeruddin Mohammad Khaja;

  • 作者单位

    Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, South Korea;

    Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, South Korea|Ecole Polytech Fed Lausanne, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland|Sungkyunkwan Univ, Dept Energy Sci, 2066 Seobu Ro, Suwon 16419, South Korea;

    Ecole Polytech Fed Lausanne, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland;

    Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, South Korea;

    Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, South Korea;

    Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, South Korea;

    Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, South Korea;

    Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, South Korea;

    Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, South Korea;

    Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, South Korea;

    Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, South Korea;

    Gumi Elect & Informat Technol Res Inst, Business Support Dept, Gumi 39171, South Korea;

    Samsung Adv Inst Technol, 130 Samsung Ro, Suwon 16678, South Korea;

    Ecole Polytech Fed Lausanne, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland;

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  • 正文语种 eng
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  • 关键词

    defect; degradation; long-term stability; mixed perovskite; perovskite solar cells;

    机译：缺陷;降解;长期稳定性;钙钛矿混合体;钙钛矿太阳能电池;

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