Liq interlayer as electron extraction layer for highly efficient and stable perovskite solar cells,International Journal of Energy Research

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Liq interlayer as electron extraction layer for highly efficient and stable perovskite solar cells
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2021-12-12 , DOI: 10.1002/er.7519
Kunsik An ₁ , Jaehoon Kim ₂ , Beomhee Yoon ₃ , Hyunho Lee ₃

Affiliation

Halide perovskite solar cells (PSCs) have gained enormous attention due to their favorable features such as bandgap tunability, considerable free carrier diffusion length, low-cost fabrication, and comparable efficiency to that of conventional silicon solar cells. Among several PSCs' structures, the inverted structure is the most suitable candidate for diverse portable applications since they can take advantage of the previously developed organic solar cells' structure. However, the single transporting layer system of the inverted-structured PSCs makes it challenging to achieve high efficiency and operational stability. Here, we introduce a unique transporting layer system that adopts 8-hydroxyquinolinolato-lithium (Liq) as a buffer layer at the interface between [6,6]-phenyl C71 butyric acid methyl ester (PC₇₀BM) and Ag electrode. By introducing the Liq, we effectively decreased the potential energy barrier and iodide accumulation at the interface between PC₇₀BM and Ag electrode, which resulted in an efficient and stable PSC. In the optimized structure, the power conversion efficiency and stability (T₈₀) increased from 9.5% and 100 h to 10.13% and 200 h, respectively.

中文翻译：

Liq中间层作为高效稳定钙钛矿太阳能电池的电子提取层

卤化物钙钛矿太阳能电池 (PSC) 因其带隙可调性、相当大的自由载流子扩散长度、低成本制造以及与传统硅太阳能电池相当的效率等有利特性而备受关注。在几种 PSC 结构中，倒置结构是最适合各种便携式应用的候选者，因为它们可以利用先前开发的有机太阳能电池结构。然而，倒置结构的 PSC 的单传输层系统使其难以实现高效率和运行稳定性。在这里，我们介绍了一种独特的传输层系统，该系统采用 8-羟基喹啉锂 (Liq) 作为 [6,6]-苯基 C71 丁酸甲酯 (PC ₇₀BM) 和 Ag 电极。_{通过引入 Liq，我们有效地降低了 PC 70} BM 和 Ag 电极之间界面处的势能势垒和碘化物积累，从而产生了高效且稳定的 PSC。在优化的结构中，功率转换效率和稳定性（T ₈₀）分别从9.5%和100 h提高到10.13%和200 h。

更新日期：2021-12-12

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