Additive-Induced Synergies of Defect Passivation and Energetic Modification toward Highly Efficient Perovskite Solar Cells,Advanced Energy Materials

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Additive-Induced Synergies of Defect Passivation and Energetic Modification toward Highly Efficient Perovskite Solar Cells
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2021-06-17 , DOI: 10.1002/aenm.202101394
Shaobing Xiong ₁ , Zhangyu Hou ₁ , Wei Dong ₂ , Danqin Li ₁ , Jianming Yang ₁ , Ruirong Bai ₃ , Yuning Wu ₃ , Dong Li ₄ , Hongbo Wu ₅ , Zaifei Ma ₅ , Jianhua Xu ₄ , Xianjie Liu ₆ , Qinye Bao _{1,

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Affiliation

Defect passivation via additive and energetic modification via interface engineering are two effective strategies for achieving high-performance perovskite solar cells (PSCs). Here, the synergies of pentafluorophenyl acrylate when used as additive, in which it not only passivates surface defect states but also simultaneously modifies the energetics at the perovskite/Spiro-OMeTAD interface to promote charge transport, are shown. The additive-induced synergy effect significantly suppresses both defect-assisted recombination and interface carrier recombination, resulting in a device efficiency of 22.42% and an open-circuit voltage of 1.193 V with excellent device stability. The two photovoltaic parameters are among the highest values for polycrystalline CsFormamidinium/Methylammonium (FAMA)/FAMA based n-i-p structural PSCs using low-cost silver electrodes reported to date. The findings provide a promising approach by choosing the dual functional additive to enhance efficiency and stability of PSCs.

中文翻译：

添加剂诱导的缺陷钝化和能量改性对高效钙钛矿太阳能电池的协同作用

通过添加剂进行缺陷钝化和通过界面工程进行能量修饰是实现高性能钙钛矿太阳能电池 (PSC) 的两种有效策略。在这里，显示了五氟苯基丙烯酸酯用作添加剂时的协同作用，其中它不仅钝化表面缺陷状态，而且同时改变钙钛矿/Spiro-OMeTAD 界面的能量以促进电荷传输。添加剂诱导的协同效应显着抑制了缺陷辅助复合和界面载流子复合，器件效率为 22.42%，开路电压为 1.193 V，具有优异的器件稳定性。这两个光伏参数是迄今为止报道的使用低成本银电极的基于多晶 CsFormamidinium/甲基铵 (FAMA)/FAMA 的 nip 结构 PSC 的最高值。该研究结果通过选择双功能添加剂来提高 PSC 的效率和稳定性，提供了一种有前景的方法。

更新日期：2021-08-07

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