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首页> 外文期刊>Advanced energy materials >Improved SnO_2 Electron Transport Layers Solution-Deposited at Near Room Temperature for Rigid or Flexible Perovskite Solar Cells with High Efficiencies
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Improved SnO_2 Electron Transport Layers Solution-Deposited at Near Room Temperature for Rigid or Flexible Perovskite Solar Cells with High Efficiencies

机译：改进的SnO_2电子传输层溶液在室温下沉积，用于高效率的刚性或柔性钙钛矿太阳能电池

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摘要

Electron transport layer (ETL) is a functional layer of great significance for boosting the power conversion efficiency (PCE) of perovskite solar cells (PSCs). To date, it is still a challenge to simultaneously reduce the surface defects and improve the crystallinity in ETLs during their low-temperature processing. Here, a novel strategy for the mediation of in situ regrowth of SnO2 nanocrystal ETLs is reported: introduction of controlled trace amounts of surface absorbed water on the fluorinated tin oxide (FTO) or indium-tin oxide (ITO) surfaces of the substrates using ultraviolet ozone (UVO) pretreatment. The optimum amount of adsorbed water plays a key role in balancing the hydrolysis-condensation reactions during the structural evolution of SnO2 thin films. This new approach results in a full-coverage SnO2 ETL with a desirable morphology and crystallinity for superior optical and electrical properties, as compared to the control SnO2 ETL without the UVO pretreatment. Finally, the rigid and flexible PSC devices based on the new SnO2 ETLs yield high PCEs of up to 20.5% and 17.5%, respectively.
机译：电子传输层（ETL）是对提高钙钛矿型太阳能电池（PSC）的功率转换效率（PCE）具有重要意义的功能层。迄今为止，在ETL的低温加工过程中同时减少其表面缺陷并提高其结晶度仍然是一个挑战。在此，报道了一种新的介导SnO2纳米晶体ETL原位再生的策略：使用紫外线在基板的氟化锡（FTO）或铟锡氧化物（ITO）表面上引入受控量的表面吸收水臭氧（UVO）预处理。在SnO2薄膜的结构演化过程中，最佳的吸附水量在平衡水解-缩合反应中起着关键作用。与没有进行UVO预处理的对照SnO2 ETL相比，这种新方法可产生具有理想形态和结晶度的全覆盖SnO2 ETL，具有优异的光学和电学性能。最后，基于新型SnO2 ETL的刚性和柔性PSC器件可分别产生高达20.5％和17.5％的高PCE。

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  • 来源
    《Advanced energy materials》 |2019年第26期|1900834.1-1900834.9|共9页
  • 作者

    Dong Qingshun; Li Jiangwei; Shi Yantao; Chen Min; Ono Luis K.; Zhou Ke; Zhang Chunyang; Qi Yabing; Zhou Yuanyuan; Padture Nitin P.; Wang Liduo;

  • 作者单位

    Tsinghua Univ, Dept Chem, Minist Educ, Key Lab Organ Optoelect Mol Engn, Beijing 100084, Peoples R China|Dalian Univ Technol, Sch Chem, State Key Lab Fine Chem, Dalian 116024, Peoples R China|Brown Univ, Sch Engn, Providence, RI 02912 USA;

    Tsinghua Univ, Dept Chem, Minist Educ, Key Lab Organ Optoelect Mol Engn, Beijing 100084, Peoples R China;

    Dalian Univ Technol, Sch Chem, State Key Lab Fine Chem, Dalian 116024, Peoples R China;

    Brown Univ, Sch Engn, Providence, RI 02912 USA;

    Okinawa Inst Sci & Technol Grad Univ, Energy Mat & Surface Sci Unit, Onna, Okinawa 9040495, Japan;

    Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Fujian, Peoples R China;

    Dalian Univ Technol, Sch Chem, State Key Lab Fine Chem, Dalian 116024, Peoples R China;

    Okinawa Inst Sci & Technol Grad Univ, Energy Mat & Surface Sci Unit, Onna, Okinawa 9040495, Japan;

    Brown Univ, Sch Engn, Providence, RI 02912 USA;

    Brown Univ, Sch Engn, Providence, RI 02912 USA;

    Tsinghua Univ, Dept Chem, Minist Educ, Key Lab Organ Optoelect Mol Engn, Beijing 100084, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    morphological control; nanocrystal regrowth; perovskite solar cells; room temperature; tin dioxide;

    机译：形态控制;纳米晶体再生;钙钛矿太阳能电池;室温;二氧化锡;

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