Improved Carrier Collection and Hot Electron Extraction Across Perovskite, C60, and TiO2 Interfaces,Journal of the American Chemical Society

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Improved Carrier Collection and Hot Electron Extraction Across Perovskite, C60, and TiO2 Interfaces
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2019-12-22 , DOI: 10.1021/jacs.9b09182
Jesús Jiménez-López _{1,

2} , Bianka M D Puscher ₃ , Dirk M Guldi ₃ , Emilio Palomares _{1,

4}

Affiliation

The use of C60 as an interfacial layer between TiO2 and methyl ammonium lead iodide perovskite is probed to reduce the cur-rent-voltage hysteresis in perovskite solar cells (PSCs) and, in turn, to impact the interfacial carrier injection and recombination processes that limit solar cell efficiencies. Detailed kinetic analyses across different timescales, that is, from the femtoseconds to the seconds, reveal that the charge carrier lifetimes as well as the charge injection and charge recombination dynamics depend largely on the presence or absence of C60. In addition, we corroborate that C60 is applicable in hot carrier PSCs as it is capable of extracting hot carriers generated throughout the early timescales following photoexcitation.

中文翻译：

改善钙钛矿、C60 和 TiO2 界面的载流子收集和热电子提取

探索使用 C60 作为 TiO2 和甲基铵碘化铅钙钛矿之间的界面层，以减少钙钛矿太阳能电池 (PSC) 中的电流电压滞后，进而影响界面载流子注入和复合过程，从而限制太阳能电池效率。跨不同时间尺度（即从飞秒到秒）的详细动力学分析表明，电荷载流子寿命以及电荷注入和电荷复合动力学在很大程度上取决于 C60 的存在与否。此外，我们证实 C60 适用于热载流子 PSC，因为它能够提取光激发后整个早期时间尺度产生的热载流子。

更新日期：2019-12-22

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