Defect passivation with tert-substituted organic materials for high efficiency perovskite solar cells

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2026-06-01 Epub Date: 2026-02-13 DOI:10.1016/j.optmat.2026.117954

Haoyi Zhang , Chaoqun Zhang , Xuediao Cai , Fei Gao , Shengzhong (Frank) Liu

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Abstract

Perovskite solar cells (PSCs) have witnessed rapid development in their power conversion efficiency (PCE) in recent times. However, defects on the perovskite film surface or grain boundary could lead to performance degradation in terms of the stability and efficiency of PSCs. In the present study, an organic tert-substituted aromatic compound with multifunctional groups of 4-Chloro-2-fluoro-6-iodoaniline (CFI) was introduced into perovskite films to achieve defect passivation on the film surface. In comparison to untreated perovskites, CFI-treated perovskites exhibited a smooth surface with lower defect density and non-radiative recombination within perovskite. This resulted in enhanced V_oc and FF, consequently, the PCE of the planar PSC is improved from 22.52% to 24.26%. Furthermore, the environmental stability of PSCs is also enhanced. Therefore, surface passivation with organic compound containing multifunctional groups could serve as an effective strategy for defect passivating to improve the performance of PSCs.

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用三元取代有机材料钝化高效钙钛矿太阳能电池的缺陷

近年来，钙钛矿太阳能电池（PSCs）的功率转换效率（PCE）得到了迅速的发展。然而，钙钛矿薄膜表面或晶界上的缺陷会导致聚苯乙烯复合材料的稳定性和效率下降。本研究将一种具有4-氯-2-氟-6-碘苯胺（CFI）多官能团的有机叔取代芳香族化合物引入到钙钛矿薄膜中，在薄膜表面实现缺陷钝化。与未处理的钙钛矿相比，cfi处理的钙钛矿表面光滑，缺陷密度低，钙钛矿内部无辐射复合。这导致了Voc和FF的增强，从而使平面PSC的PCE从22.52%提高到24.26%。此外，PSCs的环境稳定性也得到了提高。因此，用含多官能团的有机化合物进行表面钝化可以作为一种有效的缺陷钝化策略，以提高聚能干细胞的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.