Fabricating an optimal rutile TiO2 electron transport layer by delicately tuning TiCl4 precursor solution for high performance perovskite solar cells
Fabricating an optimal rutile TiO2 electron transport layer by delicately tuning TiCl4 precursor solution for high performance perovskite solar cells
复制标题
通过精细调整高性能钙钛矿太阳能电池的 TiCl4 前体溶液制造最佳金红石 TiO2 电子传输层
DOI：
10.1016/j.nanoen.2019.104336
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发表时间：
2020-02-01
期刊：
影响因子：
17.6
通讯作者：
Li, Chang Ming
中科院分区：
文献类型：
--
作者：
Lu, Hao;Zhong, Junyu;Li, Chang Ming
在此，我们构建电子传输层（ETL）与TiO 2薄膜含有合理的数量调整短TiO 2纳米线阵列和纳米花复合物通过精细调整TiCl 4前体溶液的高性能钙钛矿太阳能电池。最佳制备的TiO 2短纳米线阵列/纳米花复合ETL基器件可以提供超过20%的高功率转换效率（PCE），这是迄今为止所有单一金红石型TiO 2 ETL基钙钛矿太阳能电池中最高的。系统的机理研究发现，一维TiO 2短纳米线阵列结合定量定制的纳米花作为反射伞，可以提供短的直接电荷传输路径，低漏电流，低电荷转移电阻和低复合率，以及提高光收集效率的光散射。这项工作揭示了通过合理调整前体溶液来设计有效的电子传输层，同时提供了一种简便的方法来制造用于高性能钙钛矿太阳能电池的电子传输层的廉价纳米结构。
Herein, we construct electron transport layers (ETLs) with a TiO2 film containing rationally quantity-adjusted short TiO2 nanowire arrays and nanoflowers composite by delicately tuning TiCl4 precursor solution for high-performance perovskite solar cells. The optimal as-prepared TiO2 short-nanowire arrays/nanoflowers composite ETL-based device can deliver a high power conversion efficiency (PCE) of more than 20%, which ranks the highest among all single rutile type TiO2 ETL-based perovskite solar cells up to date. Systematic mechanism investigation discovers that 1-D TiO2 short-nanowire arrays combined with quantitatively tailored nanoflowers as a refection umbrella can offer short direct charge transport pathways, low leakage current, low charge transfer resistance and low recombination rate as well as improved light harvest from efficient light scattering. This work sheds a light on designing an efficient electron transport layer by rationally tuning a precursor solution while offering a facile approach to fabricate an inexpensive nanostructure for electron transport layers toward high-performance perovskite solar cells.