Multi‐Site Lead Passivation via Spatial Configuration Modulation of Additives for Efficient Perovskite Solar Cells

IF 26 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Advanced Energy Materials Pub Date : 2025-07-09 DOI:10.1002/aenm.202502409

Zewu Feng, Yanbo Wang, Jinzhi Si, Jianjun Xu, Yansen Guo, Hailong Huang, Yi Ji, Huanyu Zhang, Le Li, Shuilong Kang, Xueqi Wu, Xin Li, Yige Peng, Yitong Liu, Chenghao Ge, Chaopeng Huang, Yurou Zhang, Jingsong Sun, Siyu Chen, Weichang Zhou, Dongsheng Tang, Youyong Li, Bin Ding, Jefferson Zhe Liu, Klaus Weber, Nan Hu, Xiang He, Yi Cui, Hualin Zhan, Xiaohong Zhang, Jun Peng

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引用次数: 0

Abstract

Perovskite solar cells (PSCs) hold great promise as the next‐generation low‐cost photovoltaic technology due to their solution processability; however, this very advantage introduces intrinsic defects and microstructural imperfections, often limiting their performance and stability. Here, 4,4′‐oxydibenzenesulfonyl chloride (OBSC), featuring a flexible backbone with two sulfonyl chloride (SO2Cl) groups, is introduced as a bifunctional molecular additive to simultaneously passivate defects and regulate crystallization in perovskite films. The unique spatial configuration enables multi‐site coordination, strongly binding to uncoordinated lead (Pb2+) via Pb−O interactions and interacting with formamidinium (FA+) through hydrogen bonding, effectively suppressing nonradiative recombination. Concurrently, OBSC stabilizes perovskite‐solvent intermediate phases, retarding crystallization kinetics to promote the formation of high‐quality films with enlarged grains and reduced trap densities. Consequently, the optimized PSCs demonstrate a champion power conversion efficiency (PCE) of 26.39% (certified 26.03%). Furthermore, the device retains 96% of the initial PCE after 1100 h of continuous one‐sun illumination. This work demonstrates the effectiveness of bifunctional additives in simultaneously addressing defects and crystallization issues, presenting a powerful strategy for achieving high‐performance, stable perovskite photovoltaics.

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高效钙钛矿太阳能电池添加剂空间结构调制的多位点铅钝化

钙钛矿太阳能电池（PSCs）由于其溶液可加工性，作为下一代低成本光伏技术具有很大的前景；然而，这种优势引入了内在缺陷和微观结构缺陷，往往限制了它们的性能和稳定性。本文引入了4,4′‐氧基二苯磺酰氯（OBSC）作为双功能分子添加剂，其具有柔性骨架，具有两个磺酰氯（SO2Cl）基团，可以同时钝化钙钛矿薄膜中的缺陷和调节结晶。独特的空间结构实现了多位点配位，通过Pb−O相互作用与非配位铅（Pb2+）强结合，并通过氢键与甲脒（FA+）相互作用，有效抑制非辐射重组。同时，OBSC稳定了钙钛矿-溶剂中间相，延缓了结晶动力学，促进了高质量薄膜的形成，晶粒变大，陷阱密度降低。因此，优化后的psc显示出26.39%的冠军功率转换效率（PCE）（认证26.03%）。此外，该装置在连续一次太阳照射1100小时后仍能保持96%的初始PCE。这项工作证明了双功能添加剂在同时解决缺陷和结晶问题方面的有效性，为实现高性能、稳定的钙钛矿光伏电池提供了强有力的策略。

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

Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

41.90

自引率

4.00%

发文量

889

审稿时长

1.4 months

期刊介绍： Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.