Bottom-Up Defect Modification Through Oily-Allicin Modified Buried Interface Achieving Highly Efficient and Stable Perovskite Solar Cells,Advanced Materials

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Bottom-Up Defect Modification Through Oily-Allicin Modified Buried Interface Achieving Highly Efficient and Stable Perovskite Solar Cells
Advanced Materials ( IF 27.4 ) Pub Date : 2024-07-18 , DOI: 10.1002/adma.202403257
Xinmeng Zhuang _{1,

2} , Donglei Zhou ₁ , Yanrun Jia ₁ , Shuainan Liu ₁ , Jin Liang ₁ , Yuze Lin ₃ , Huiqing Hou ₃ , Dongmin Qian ₄ , Tingting Zhou ₁ , Xue Bai ₁ , Hongwei Song _{1,

5}

Affiliation

The buried interface properties of the perovskite solar cells (PSCs) play a crucial role in the power conversion efficiency (PCE) and operational stability. The metal-oxide/perovskite heterogeneous interfaces are highly defective and cause serious ion migration. However, the buried and unexposed bottom interface and simultaneous stabilization of grain boundaries receive less attention and effective solutions. To tackle this problem, a solid–liquid strategy is employed by introducing oily-additive allicin at the buried interface to passivate the shallow (V_I and Vo) and deep traps (V_Pb and Pb_I). Interestingly, oily status allicin fills the pinholes at the heterointerface and wraps the perovskite grains, suppressing the ion migration during the photoaging process. As a result, an outstanding PCE of 25.07% is achieved with a remarkable fill factor (FF) of 84.03%. The modified devices can maintain 94.51% of the original PCE after light soaking under 1-sun illumination for 1000 h. This work demonstrates a buried interface modification method that employs an eco-friendly additive, which helps promote the development of PSCs with high performance and stability.

中文翻译：

通过油蒜素修饰的埋入界面自下而上的缺陷修饰实现高效稳定的钙钛矿太阳能电池

钙钛矿太阳能电池（PSC）的埋入界面特性对于功率转换效率（PCE）和运行稳定性起着至关重要的作用。金属氧化物/钙钛矿异质界面存在高度缺陷，会导致严重的离子迁移。然而，埋藏和未暴露的底部界面以及晶界的同时稳定却受到较少的关注和有效的解决方案。为了解决这个问题，采用固液策略_，在埋藏界面引入油性添加剂大蒜素来钝化浅层（ V和Vo ）和深层陷阱（ VPb和Pb ）。有趣的是，油状大蒜素填充异质界面处的针孔并包裹钙钛矿晶粒，抑制光老化过程中的离子迁移。结果，实现了 25.07% 的出色 PCE 和 84.03% 的出色填充因子 (FF)。改进后的器件在1sun光照下浸泡1000h后仍能保持原始PCE的94.51%。这项工作展示了一种采用环保添加剂的埋入界面改性方法，有助于促进高性能和稳定性PSC的发展。

更新日期：2024-07-18

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