Tuning of perovskite solar cell performance via low-temperature brookite scaffolds surface modifications
Tuning of perovskite solar cell performance via low-temperature brookite scaffolds surface modifications
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DOI：
10.1063/1.4973892
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发表时间：
2017-01
期刊：
影响因子：
6.1
通讯作者：
T. Singh;Y. Udagawa;M. Ikegami;H. Kunugita;K. Ema;T. Miyasaka
中科院分区：
文献类型：
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作者：
T. Singh;Y. Udagawa;M. Ikegami;H. Kunugita;K. Ema;T. Miyasaka
金属氧化物支架的性质对于高质量钙钛矿的生长起到了关键作用，并随后促进了高效光伏器件的发展。我们展示了一种有效的方法来制造具有均匀且无针孔层的低温 TiO2 板钛矿支架层，以增强钙钛矿太阳能电池的光伏性能。使用不同浓度的 TiCl4 对板钛矿 TiO2 进行改性，以实现有效的电荷生成和快速电荷提取。我们观察到，经过适当 TiCl4 处理的板钛矿层具有光滑的表面，完全覆盖基材，而 TiCl4 处理进一步改善了 TiO2/钙钛矿界面的接触，有利于电荷提取并极大地影响电荷复合。表面处理的板钛矿支架钙钛矿器件表现出改进的性能，平均功率转换效率超过17%。时间分辨光致发光表明处理后的样品具有明显的...
The nature of metal oxide scaffold played a pivotal role for the growth of high quality perovskites and subsequently facilitates efficient photovoltaics devices. We demonstrate an effective way to fabricate a low-temperature TiO2 brookite scaffold layer with a uniform and pinhole-free layer for enhancing photovoltaic properties of perovskite solar cells. Various concentrations of TiCl4 were used to modify brookite TiO2 for efficient charge generation and fast charge extraction. We observed that the brookite layer with an appropriate TiCl4 treatment possesses a smooth surface with full coverage of the substrates, whereas TiCl4 treatment further improves the contact of the TiO2/perovskite interface which facilitates charge extraction and drastically influenced charge recombination. The surface treated brookite scaffolds perovskite devices showed an improved performance with an average power conversion efficiency more than 17%. The time resolved photoluminescence showed that the treated samples have obvious ...