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首页> 外文期刊>Advanced Functional Materials >Gaining Insight into the Effect of Organic Interface Layer on Suppressing Ion Migration Induced Interfacial Degradation in Perovskite Solar Cells
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Gaining Insight into the Effect of Organic Interface Layer on Suppressing Ion Migration Induced Interfacial Degradation in Perovskite Solar Cells

机译：获得有机界面层对抑制离子迁移诱导的近泊太阳能电池的界面降解的影响

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摘要

Ion migration induced interfacial degradation is a detrimental factor for the stability of perovskite solar cells (PSCs) and hence requires special attention to address this issue for the development of efficient PSCs with improved stability. Here, an "S-shaped, hook-like" organic small molecule, naphthalene diimide derivative (NDI-BN), is employed as a cathode interface layer (CIL) to tailor the [6,6]-phenylC61-butyric acid methylester (PCBM)/Ag interface in inverted PSCs. By realizing enhanced electron extraction capability via the incorporation of NDI-BN, a peak power conversion efficiency of 21.32% is achieved. Capacitance-voltage measurements and X-ray photoelectron spectroscopy analysis confirmed an obvious role of this new organic CIL in successfully blocking ionic diffusion pathways toward the Ag cathode, thereby preventing interfacial degradation and improving device stability. The molecular packing motif of NDI-BN further unveils its densely packed structure with p-p stacking force which has the ability to effectually hinder ion migration. Furthermore, theoretical calculations reveal that intercalation of decomposed perovskite species into the NDI clusters is considerably more difficult compared with the PCBM counterparts. This substantial contrast between NDI-BN and PCBM molecules in terms of their structures and packing fashion determines the different tendencies of ion migration and unveils the superior potential of NDI-BN in curtailing interfacial degradation.
机译：离子迁移诱导的界面降解是钙钛矿太阳能电池（PSC）稳定性的不利因素，因此需要特别注意解决具有改善稳定性的高效PSC的问题。这里，使用“S形钩状的”有机小分子，萘二酰亚胺衍生物（NDI-BN）作为阴极界面层（CIL），以定制[6,6] -phenylc61-丁酸甲基酯（ PCBM）/ AG接口在反相PSC中。通过掺入NDI-BN实现增强的电子提取能力，实现了21.32％的峰值功率转换效率。电容 - 电压测量和X射线光电子能谱分析证实了该新有机CIL在成功阻断离子扩散途径朝向Ag阴极的明显作用，从而防止界面降解和改善装置稳定性。 NDI-BN的分子包装基序进一步推出其具有P-P堆叠力的密集填充结构，其具有有效地阻碍离子迁移的能力。此外，理论计算表明，与PCBM对应物相比，将分解的钙钛矿物种与NDI集群的嵌入相比更加困难。在其结构和包装方式方面，NDI-BN和PCBM分子之间的这种在离子迁移的不同趋势中的这种基本对比度并揭示了NDI-BN在缩减界面降解中的优异潜力。

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  • 来源
    《Advanced Functional Materials》 |2020年第35期|2000837.1-2000837.12|共12页
  • 作者

    Ning Jiaoyi; Zhu Yanan; Hu Zhao; Shi Yuhao; Ali Muhammad Umair; He Junpeng; He Yaowu; Yan Feng; Yang Shihe; Miao Jingsheng; Meng Hong;

  • 作者单位

    Peking Univ Shenzhen Grad Sch Sch Adv Mat Shenzhen 518055 Peoples R China;

    Peking Univ Shenzhen Grad Sch Sch Adv Mat Shenzhen 518055 Peoples R China;

    Hong Kong Polytech Univ Dept Appl Phys Hong Kong 999077 Peoples R China;

    Peking Univ Shenzhen Grad Sch Sch Adv Mat Shenzhen 518055 Peoples R China;

    Peking Univ Shenzhen Grad Sch Sch Adv Mat Shenzhen 518055 Peoples R China|Peking Univ Dept Mat Sci & Engn Coll Engn Beijing 100871 Peoples R China;

    Peking Univ Shenzhen Grad Sch Sch Adv Mat Shenzhen 518055 Peoples R China;

    Peking Univ Shenzhen Grad Sch Sch Adv Mat Shenzhen 518055 Peoples R China;

    Hong Kong Polytech Univ Dept Appl Phys Hong Kong 999077 Peoples R China;

    Hong Kong Univ Sci & Technol Nano Sci & Technol Program Hong Kong 999077 Peoples R China|Hong Kong Univ Sci & Technol Dept Chem Hong Kong 999077 Peoples R China;

    Peking Univ Shenzhen Grad Sch Sch Adv Mat Shenzhen 518055 Peoples R China;

    Peking Univ Shenzhen Grad Sch Sch Adv Mat Shenzhen 518055 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    high-efficiency; interfacial degradation; organic interface layer; perovskite solar cells; stability;

    机译：高效;界面降解;有机界面层;钙钛矿太阳能电池;稳定性;

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