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首页> 外文期刊>RSC Advances >Crystal recombination control by using Ce doped in mesoporous TiO2 for efficient perovskite solar cells
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Crystal recombination control by using Ce doped in mesoporous TiO2 for efficient perovskite solar cells

机译：通过使用Ce掺杂在介孔TiO2中的Ce晶体重组控制，用于高效的Perovskite太阳能电池

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摘要

Efficient electron transport layers (ETLs) are the crucial issue for electron transport and hole blocking in organic-inorganic hybrid perovskite solar cells (PSCs). To date, most of the reported effective ETLs have comprised TiO2, which exhibits limited electron mobility and numerous defect states and restricts the enhancement of the performance of PSCs. Hence, the investigation of effective tactics for improving the electronic properties of TiO2 is critical for the fabrication of high-efficiency devices. In this study, a cerium doping method was adopted in mesoporous TiO2, which was prepared via a traditional one-step hydrothermal process, to improve its electron transport properties by recombining nanocrystals and optimizing the negative flat band potential of TiO2. Continuous, aligned and regulated recombined crystals of mesoporous TiO2 were obtained with optimized pathways of electron transport from the ETL to the FTO layer. Moreover, a small amount of Ti4+ ions was replaced by Ce4+ ions in the TiO2 lattice, which led to deformation of the TiO2 lattice and influenced the growth process of TiO2 grains. With an optimized mole proportion of Ce element in the TiO2 precursor, the power conversion efficiency (PCE) of perovskite solar cells was typically boosted to 17.75% in comparison with 15.92% in the case of undoped TiO2.
机译：高效的电子传输层（ETL）是有机 - 无机杂交钙钛矿太阳能电池（PSC）中的电子传输和空穴堵塞的关键问题。迄今为止，大多数报告的有效ETL都包括TiO2，其展示了有限的电子迁移率和许多缺陷状态，并限制了PSC的性能的增强。因此，改善TiO2电子性能的有效策略的研究对于制造高效装置至关重要。在该研究中，在介孔TiO 2中采用铈掺杂方法，其通过传统的一步水热法制备，通过重组纳米晶体来改善其电子传输性能并优化TiO2的负扁平带电位。通过从EtL到FTO层的电子传输的优化途径获得连续，对准和​​调节的介孔TiO 2的重组晶体。此外，TiO 2晶格中的CE4 +离子少量的Ti 4 +离子被替换为TiO 2格的变形并影响TiO2晶粒的生长过程。通过TiO 2前体中的优化摩尔比例的CE元素，钙钛矿太阳能电池的功率转换效率（PCE）通常在未掺杂的TiO 2的情况下促进了15.92％的17.75％。

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  • 来源
    《RSC Advances》 |2019年第2期|共9页
  • 作者

    Lu Honglin; Zhuang Jia; Ma Zhu; Zhou Weiya; Xia Haoran; Xiao Zheng; Zhang Hua; Li Haimin;

  • 作者单位

    Southwest Petr Univ Sch Mat Sci &

    Engn Ctr New Energy Mat &

    Technol Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ Sch Mat Sci &

    Engn Ctr New Energy Mat &

    Technol Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ Sch Mat Sci &

    Engn Ctr New Energy Mat &

    Technol Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ Sch Mat Sci &

    Engn Ctr New Energy Mat &

    Technol Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ Sch Mat Sci &

    Engn Ctr New Energy Mat &

    Technol Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ Sch Mat Sci &

    Engn Ctr New Energy Mat &

    Technol Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ Sch Mat Sci &

    Engn Ctr New Energy Mat &

    Technol Chengdu 610500 Sichuan Peoples R China;

    Southwest Petr Univ Sch Mat Sci &

    Engn Ctr New Energy Mat &

    Technol Chengdu 610500 Sichuan Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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