通过表面钝化对钙钛矿薄膜进行体重组，用于高性能太阳能电池,Advanced Energy Materials

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通过表面钝化对钙钛矿薄膜进行体重组，用于高性能太阳能电池
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2022-07-22 , DOI: 10.1002/aenm.202201787
Jian Xiong _{1,

2} , Naihe Liu _{1,

2} , Xiaotian Hu ₃ , Yifang Qi ₄ , Weizhi Liu _{1,

2} , Junqian Dai _{1,

2} , Yongsong Zhang _{1,

2} , Zhongjun Dai _{1,

2} , Xiaowen Zhang _{1,

2} , Yu Huang _{1,

2} , Zheling Zhang _{1,

2} , Qilin Dai ₄ , Jian Zhang _{1,

2}

Affiliation

钙钛矿薄膜的缺陷和次优的界面接触在很大程度上限制了倒置钙钛矿太阳能电池（PSC）的性能和稳定性。为了克服这些问题，开发了一种用N-苄氧羰基-d-缬氨酸 (NBDV)进行的简单表面后处理。系统研究了 NBDV 治疗后的设备性能。_{结果表明，NBDV表面后处理导致整个钙钛矿薄膜的体相重组，提高了[6,6]-苯基-C 61}的成膜性能。-丁酸甲酯。晶粒尺寸、结晶度、陷阱态、阴极界面以及内建场也得到了改善，从而提高了 PSC 性能和稳定性。达到了21.80％的相对较高的功率转换效率（PCE），这与基于单晶MAPbI ₃的PCE记录相当。_{同时，NBDV装置的PCE在空气中储存768 h（32天）和N 2}储存8376 h（349天）后，分别可以保持初始值的≈77%和84% ，而控制装置仅保持在相同的暴露条件下，分别为其初始 PCE 值的 53% 和 38%。这项工作为促进体积、表面和界面调节向高性能和稳定的倒置 PSC 提供了手段。

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Bulk Restructure of Perovskite Films via Surface Passivation for High-Performance Solar Cells

Defects in perovskite films and the suboptimal interface contact largely limit the performance and stability of inverted perovskite solar cells (PSCs). A simple surface post-treatment with N-benzyloxycarbonyl-d-valine (NBDV) is developed to overcome these problems. The device performance following NBDV treatment is systemically investigated. It is showed that NBDV surface post-treatment results in the bulk restructure of the entire perovskite film and improves the film-forming property of [6,6]-phenyl-C₆₁-butyric acid methyl ester. The grain sizes, crystallinity, trap states, cathode interfaces, as well as the built-in field are also improved, which result in PSC performance and stability enhancement. A relatively higher power conversion efficiency (PCE) of 21.80% is reached, which is comparable to the PCE record based on single-crystal MAPbI₃. Meanwhile, the PCE of the NBDV devices can retain ≈77% and 84% of the initial value after storage for 768 h (32 days) in air and 8376 h (349 days) in N₂, respectively, while the control devices only maintain ≈53% and 38% of their initial PCE values under the same exposure conditions. This work provides means to promote bulk, surface, and interface regulation toward high performance and stable inverted PSCs.

更新日期：2022-07-22

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