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首页> 外文期刊>Advanced energy materials >High-Efficiency and Durable Inverted Perovskite Solar Cells with Thermally-Induced Phase-Change Electron Extraction Layer
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High-Efficiency and Durable Inverted Perovskite Solar Cells with Thermally-Induced Phase-Change Electron Extraction Layer

机译：具有热诱导的相变电子提取层的高效率和耐用的倒闭钙钛矿太阳能电池

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摘要

Reducing carrier recombination and facilitating charge extraction at the interface is of great significance to improve the device performance of perovskite solar cells (PSCs) towards commercial use. However, there has been little work done concerning transportation and recombination mechanism at the interface of the metal electrode and the electron transport layer in inverted PSCs. Herein, a new strategy of interface modification is reported that leverages the unique metal-to-insulator transition (MIT) characteristics of vanadium dioxide which is inserted as the electron extraction layer (EEL) in p-i-n planar PSCs. Benefiting from the suitable intermediate energy level of VO2, the optimized device shows a power conversion efficiency (PCE) up to 22.11% with negligible hysteresis, as compared to the 20.96% benchmark at room temperature. Interestingly, the PCE of VO2-based PSC increases to over 23% at 85 degrees C, which can be attributed to the dramatic change in the electrical properties and better electron extraction caused by the MIT of VO2 beyond its critical phase-change temperature. In addition, the encapsulated VO2-PSC shows superior thermal stability for 1000 h at 85 degrees C under 1 Sun illumination, maintaining over 90% of initial PCE. This work initiates the state-of-art concept of inserting thermally-induced phase-transition material as an EEL to achieve efficient and durable perovskite photovoltaics.
机译：在界面处减少载体重组和促进电荷提取具有重要意义，可以提高钙钛矿太阳能电池（PSC）对商业用途的能力。然而，在倒置PSC中的金属电极和电子传输层的界面上有很少的作用，关于金属电极的界面和电子传输层的运输和复合机构。这里，报告了一种新的界面改性策略，其利用了在P-I-N平面PSC中插入作为电子提取层（EEL）的钒的独特金属到绝缘体转变（MIT）特性。受益于VO2的合适中间能级，优化的装置显示出高达22.11％的功率转换效率（PCE），滞后率可忽略不计，而室温下的20.96％基准。有趣的是，基于VO2的PSC的PCE在85摄氏度下增加到超过23％，这可能归因于电性能的显着变化和由VO2的MIT超出其关键相变温度引起的更好的电子提取。此外，包封的VO2-PSC在1次阳光照射下在85摄氏度下呈现出优异的热稳定性，保持超过90％的初始PCE。这项工作引发了将热诱导的相转移材料作为鳗鱼插入最终的最新概念，以实现有效和耐用的钙钛矿光伏。

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  • 来源
    《Advanced energy materials》 |2021年第47期|2102844.1-2102844.11|共11页
  • 作者

    Li Xin; Meng Yun; Liu Ruizhe; Yang Zhiyao; Zeng Yan; Yi Yuanping; Sha Wei E. I; Long Yi; Yang Junyou;

  • 作者单位

    Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Peoples R China|Natl Univ Singapore Solar Energy Res Inst Singapore Singapore 117574 Singapore;

    Nanyang Technol Univ Sch Mat Sci & Engn Singapore 639798 Singapore;

    Zhejiang Univ Coll Informat Sci & Elect Engn State Key Lab Modern Opt Instrumentat Hangzhou 310027 Peoples R China;

    Zhejiang Univ Coll Informat Sci & Elect Engn State Key Lab Modern Opt Instrumentat Hangzhou 310027 Peoples R China;

    CAS Key Lab Organ Solids Beijing Natl Lab Mol Sci Beijing 100190 Peoples R China;

    CAS Key Lab Organ Solids Beijing Natl Lab Mol Sci Beijing 100190 Peoples R China;

    Zhejiang Univ Coll Informat Sci & Elect Engn State Key Lab Modern Opt Instrumentat Hangzhou 310027 Peoples R China;

    Nanyang Technol Univ Sch Mat Sci & Engn Singapore 639798 Singapore|Singapore HUJ Alliance Res & Enterprise SHARE Campus Res Excellence & Technol Enterprise CREATE Singapore 138602 Singapore|Sino Singapore Int Joint Res Inst SSIJRI Guangzhou 510000 Peoples R China;

    Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    electron extraction layers; high temperature; long-term stability; perovskite solar cells; VO; (2) phase-change materials;

    机译：电子提取层;高温;长期稳定性;Perovskite太阳能电池;VO;（2）相变材料;

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