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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：掺杂Ce的介孔TiO2对钙钛矿型太阳能电池的晶体重组控制。

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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 TiO _(2) , 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 TiO _(2) is critical for the fabrication of high-efficiency devices. In this study, a cerium doping method was adopted in mesoporous TiO _(2) , 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 TiO _(2) . Continuous, aligned and regulated recombined crystals of mesoporous TiO _(2) were obtained with optimized pathways of electron transport from the ETL to the FTO layer. Moreover, a small amount of Ti ~(4+) ions was replaced by Ce ~(4+) ions in the TiO _(2) lattice, which led to deformation of the TiO _(2) lattice and influenced the growth process of TiO _(2) grains. With an optimized mole proportion of Ce element in the TiO _(2) 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 TiO _(2) .
机译：高效电子传输层（ETL）是有机-无机杂化钙钛矿太阳能电池（PSC）中电子传输和空穴阻挡的关键问题。迄今为止，大多数已报道的有效ETL都包含TiO_（2），其表现出有限的电子迁移率和许多缺陷状态，并限制了PSC性能的增强。因此，研究改善TiO_（2）电子性能的有效策略对于制造高效器件至关重要。在这项研究中，采用传统的一步水热法制备的介孔TiO _（2）中采用铈掺杂方法，通过复合纳米晶体和优化TiO _（-）的负平带电势来改善其电子传输性能。 2）。通过从ETL到FTO层的电子传输的最佳途径，获得了介孔TiO_（2）的连续，排列和规则的重组晶体。此外，TiO _（2）晶格中的少量Ti〜（4+）离子被Ce〜（4+）离子取代，这导致TiO _（2）晶格变形并影响了TiO_（2）晶格的生长过程。 TiO _（2）晶粒。在TiO _（2）前驱体中使用优化的Ce元素摩尔比，钙钛矿型太阳能电池的功率转换效率（PCE）通常提高到17.75％，而未掺杂的TiO _（2）则为15.92％。

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