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首页> 外文期刊>Advanced Functional Materials >Engineering of the Electron Transport Layer/Perovs kite Interface in Solar Cells Designed on TiO_2 Rutile Nanorods
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Engineering of the Electron Transport Layer/Perovs kite Interface in Solar Cells Designed on TiO_2 Rutile Nanorods

机译：TiO_2金红石型纳米棒设计的太阳能电池电子传输层/ Perovs风筝界面的工程设计

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摘要

The engineering of the electron transport layer (ETL)/light absorber interface is explored in perovskite solar cells. Single-crystalline TiO2 nanorod (NR) arrays are used as ETL and methylammonium lead iodide (MAPI) as light absorber. A dual ETL surface modification is investigated, namely by a TiCl4 treatment combined with a subsequent PC61BM monolayer deposition, and the effects on the device photovoltaic performance were evaluated with respect to single modifications. Under optimized conditions, for the combined treatment synergistic effects are observed that lead to remarkable enhancements in cell efficiency, from 14.2% to 19.5%, and to suppression of hysteresis. The devices show J(SC), V-OC, and fill factor as high as 23.2 mA cm(-2), 1.1 V, and 77%, respectively. These results are ascribed to a more efficient charge transfer across the ETL/perovskite interface, which originates from the passivation of defects and trap states at the ETL surface. To the best of our knowledge, this is the highest cell performance ever reported for TiO2 NR-based solar cells fabricated with conventional MAPI light absorber. Perspective wise, this ETL surface functionalization approach combined with more recently developed and better performing light absorbers, such as mixed cation/anion hybrid perovskite materials, is expected to provide further performance enhancements.
机译：在钙钛矿太阳能电池中探索了电子传输层（ETL）/吸光剂界面的工程设计。单晶TiO2纳米棒（NR）阵列用作ETL，甲基铵碘化铅（MAPI）作为光吸收剂。研究了双重ETL表面改性，即通过TiCl4处理与后续的PC61BM单层沉积相结合，并就单一改性对器件光伏性能的影响进行了评估。在优化的条件下，对于联合治疗，观察到协同效应，可导致细胞效率显着提高，从14.2％提高到19.5％，并抑制磁滞现象。器件显示J（SC），V-OC和填充因子分别高达23.2 mA cm（-2），1.1 V和77％。这些结果归因于ETL /钙钛矿界面上更有效的电荷转移，这是由于ETL表面的缺陷和陷阱态的钝化所致。据我们所知，这是有记录的用常规MAPI光吸收剂制造的TiO2 NR基太阳能电池的最高电池性能。从透视角度来看，这种ETL表面功能化方法与最近开发的，性能更好的光吸收剂（例如，混合的阳离子/阴离子杂化钙钛矿材料）相结合，有望进一步提高性能。

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  • 来源
    《Advanced Functional Materials》 |2020年第10期|1909738.1-1909738.9|共9页
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    Univ Erlangen Nurnberg Dept Mat Sci & Engn Inst Surface Sci & Corros WW4 LKO Martensstr 7 D-91058 Erlangen Germany;

    Univ Erlangen Nurnberg Dept Mat Sci & Engn I MEET Martensstr 7 D-91058 Erlangen Germany;

    Univ Erlangen Nurnberg Dept Mat Sci & Engn I MEET Martensstr 7 D-91058 Erlangen Germany|Helmholtz Inst Erlangen Nurnberg Renewable Energy Immerwahrstr 2 D-91058 Erlangen Germany|Zhengzhou Univ Natl Engn Res Ctr Adv Polymer Proc Technol Zhengzhou 450002 Peoples R China;

    Univ Erlangen Nurnberg Dept Mat Sci & Engn I MEET Martensstr 7 D-91058 Erlangen Germany|Helmholtz Inst Erlangen Nurnberg Renewable Energy Immerwahrstr 2 D-91058 Erlangen Germany;

    Univ Erlangen Nurnberg Dept Mat Sci & Engn Inst Surface Sci & Corros WW4 LKO Martensstr 7 D-91058 Erlangen Germany|King Abdulaziz Univ Fac Sci Chem Dept Jeddah 80203 Saudi Arabia;

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  • 关键词

    defect passivation; PC61BM; perovskite solar cells; TiCl4; TiO2 nanorods;

    机译：缺陷钝化;PC61BM;钙钛矿太阳能电池;TiCl4;TiO2纳米棒;

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