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首页> 外文期刊>Advanced energy materials >Surface Electronic Modification of Perovskite Thin Film with Water-Resistant Electron Delocalized Molecules for Stable and Efficient Photovoltaics
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Surface Electronic Modification of Perovskite Thin Film with Water-Resistant Electron Delocalized Molecules for Stable and Efficient Photovoltaics

机译：耐水电子离域分子对钙钛矿薄膜的表面电子修饰，用于稳定高效的光伏

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摘要

Although the efficiency of perovskite solar cells (PSCs) is close to crystalline silicon solar cells, the instability of perovskite, especially in humid condition, still hinders its commercialization. As an effective method to improve their stability, surface functionalization, by using hydrophobic molecules, has been extensively investigated, but usually accompanied with the loss of device efficiencies owing to their intrinsic electrical insulation. In this work, for the first time, it is demonstrated that 3-alkylthiophene-based hydrophobic molecules can be used as both water-resistant and interface-modified layers, which could simultaneously enhance both stability and performance significantly. Benefitting from their unique structures of thiophene rings, the p-electrons are highly delocalized and thus enhance the charge transfer and collection at the interface. The device based on 3-hexylthiophene treatment exhibits a champion energy conversion efficiency of 19.89% with a dramatic 10% enhancement compared with the pristine one (18.08%) of Cs-0.05 FA(0.81) MA(0.14) PbBr0.45 I-2.55-based PSCs. More importantly, the degradation of the long-term efficiency of unsealed device is less than 20% in Cs-0.05 FA(0.81) MA(0.14) PbBr0.45I2.55-based PSCs after more than 700 h storage in air. This finding provides an avenue for further improvement of both the efficiency and stability of PSCs.
机译：尽管钙钛矿太阳能电池（PSC）的效率接近晶体硅太阳能电池，但钙钛矿的不稳定性（尤其是在潮湿条件下）仍然阻碍其商业化。作为改善其稳定性的有效方法，已经广泛研究了通过使用疏水性分子进行的表面功能化，但是由于其固有的电绝缘性，通常伴随着器件效率的降低。在这项工作中，第一次证明了基于3-烷基噻吩的疏水分子既可以用作防水层又可以用作界面改性层，从而可以同时显着提高稳定性和性能。得益于它们独特的噻吩环结构，p电子高度离域，因此增强了界面处的电荷转移和收集。与基于Cs-0.05 FA（0.81）MA（0.14）PbBr0.45 I-2.55的原始化合物（18.08％）相比，基于3-己基噻吩处理的设备显示出19.89％的冠军能量转换效率，且显着提高了10％。基于PSC。更重要的是，在空气中储存700小时以上后，基于Cs-0.05 FA（0.81）MA（0.14）PbBr0.45I2.55的PSC中，未密封设备的长期效率下降不到20％。这一发现为进一步提高PSC的效率和稳定性提供了一条途径。

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  • 来源
    《Advanced energy materials》 |2018年第13期|1703143.1-1703143.7|共7页
  • 作者

    Wen Tian Yu; Yang Shuang; Liu Peng Fei; Tang Li Juan; Qiao Hong Wei; Chen Xiao; Yang Xiao Hua; Hou Yu; Yang Hua Gui;

  • 作者单位

    East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    delocalization; functionalization; perovskite; solar cells; stability;

    机译：离域;功能化;钙钛矿;太阳电池;稳定性;

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