Liqing Zhan, Dr. Shuo Zhang, Zhihao Li, Wenzhuo Li, Huidong Zhang, Jingwen He, Xiaoyu Ji, Shuaijun Liu, Furong Yu, Songran Wang, Prof. Zhijun Ning, Prof. Zhen Li, Prof. Martin Stolterfoht, Prof. Liyuan Han, Prof. Wei-Hong Zhu, Prof. Yisheng Xu, Prof. Yongzhen Wu
{"title":"为高效倒置钙钛矿太阳能电池提供超薄和坚固的空穴传输层的可锚定聚合物","authors":"Liqing Zhan, Dr. Shuo Zhang, Zhihao Li, Wenzhuo Li, Huidong Zhang, Jingwen He, Xiaoyu Ji, Shuaijun Liu, Furong Yu, Songran Wang, Prof. Zhijun Ning, Prof. Zhen Li, Prof. Martin Stolterfoht, Prof. Liyuan Han, Prof. Wei-Hong Zhu, Prof. Yisheng Xu, Prof. Yongzhen Wu","doi":"10.1002/anie.202422571","DOIUrl":null,"url":null,"abstract":"<p>Currently, the development of polymeric hole-transporting materials (HTMs) lags behind that of small-molecule HTMs in inverted perovskite solar cells (PSCs). A critical challenge is that conventional polymeric HTMs are incapable of forming ultra-thin and conformal coatings like self-assembly monolayers (SAMs), especially for substrates with rough surface morphology. Herein, we address this challenge by designing anchorable polymeric HTMs (CP1 to CP5). Specifically, coordinative pyridyl groups are introduced as side-chains on poly-triarylamine (PTAA) backbone with varied contents by copolymerization method, resulting in chemical interactions between polymeric HTMs and substrates. The strong interaction allows them to be processed into ultra-thin, uniform, and robust hole-transporting layers through employing low-concentration solutions (0.1 mg mL<sup>−1</sup>, vs. 2.0–5.0 mg mL<sup>−1</sup> for conventional PTAA), greatly decreasing charge transport losses. Moreover, upon systematically tuning the pyridyl substitution ratio, the energy levels, surface wetting, solution processability, and defect passivation capability of such anchorable HTMs are simultaneously optimized. Based on the optimal CP4, we achieved highly efficient inverted PSCs with power conversion efficiencies (PCEs) up to 26.21 %, which is on par with state-of-the-art SAM-based inverted PSCs. Furthermore, these devices exhibit enhanced stabilities under repeated current–voltage scans and reverse bias ageing compared with SAM-based devices.</p>","PeriodicalId":125,"journal":{"name":"Angewandte Chemie International Edition","volume":"64 12","pages":""},"PeriodicalIF":16.1000,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Anchorable Polymers Enabling Ultra-Thin and Robust Hole-Transporting Layers for High-Efficiency Inverted Perovskite Solar Cells\",\"authors\":\"Liqing Zhan, Dr. Shuo Zhang, Zhihao Li, Wenzhuo Li, Huidong Zhang, Jingwen He, Xiaoyu Ji, Shuaijun Liu, Furong Yu, Songran Wang, Prof. Zhijun Ning, Prof. Zhen Li, Prof. Martin Stolterfoht, Prof. Liyuan Han, Prof. Wei-Hong Zhu, Prof. Yisheng Xu, Prof. Yongzhen Wu\",\"doi\":\"10.1002/anie.202422571\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Currently, the development of polymeric hole-transporting materials (HTMs) lags behind that of small-molecule HTMs in inverted perovskite solar cells (PSCs). A critical challenge is that conventional polymeric HTMs are incapable of forming ultra-thin and conformal coatings like self-assembly monolayers (SAMs), especially for substrates with rough surface morphology. Herein, we address this challenge by designing anchorable polymeric HTMs (CP1 to CP5). Specifically, coordinative pyridyl groups are introduced as side-chains on poly-triarylamine (PTAA) backbone with varied contents by copolymerization method, resulting in chemical interactions between polymeric HTMs and substrates. The strong interaction allows them to be processed into ultra-thin, uniform, and robust hole-transporting layers through employing low-concentration solutions (0.1 mg mL<sup>−1</sup>, vs. 2.0–5.0 mg mL<sup>−1</sup> for conventional PTAA), greatly decreasing charge transport losses. Moreover, upon systematically tuning the pyridyl substitution ratio, the energy levels, surface wetting, solution processability, and defect passivation capability of such anchorable HTMs are simultaneously optimized. Based on the optimal CP4, we achieved highly efficient inverted PSCs with power conversion efficiencies (PCEs) up to 26.21 %, which is on par with state-of-the-art SAM-based inverted PSCs. 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Anchorable Polymers Enabling Ultra-Thin and Robust Hole-Transporting Layers for High-Efficiency Inverted Perovskite Solar Cells
Currently, the development of polymeric hole-transporting materials (HTMs) lags behind that of small-molecule HTMs in inverted perovskite solar cells (PSCs). A critical challenge is that conventional polymeric HTMs are incapable of forming ultra-thin and conformal coatings like self-assembly monolayers (SAMs), especially for substrates with rough surface morphology. Herein, we address this challenge by designing anchorable polymeric HTMs (CP1 to CP5). Specifically, coordinative pyridyl groups are introduced as side-chains on poly-triarylamine (PTAA) backbone with varied contents by copolymerization method, resulting in chemical interactions between polymeric HTMs and substrates. The strong interaction allows them to be processed into ultra-thin, uniform, and robust hole-transporting layers through employing low-concentration solutions (0.1 mg mL−1, vs. 2.0–5.0 mg mL−1 for conventional PTAA), greatly decreasing charge transport losses. Moreover, upon systematically tuning the pyridyl substitution ratio, the energy levels, surface wetting, solution processability, and defect passivation capability of such anchorable HTMs are simultaneously optimized. Based on the optimal CP4, we achieved highly efficient inverted PSCs with power conversion efficiencies (PCEs) up to 26.21 %, which is on par with state-of-the-art SAM-based inverted PSCs. Furthermore, these devices exhibit enhanced stabilities under repeated current–voltage scans and reverse bias ageing compared with SAM-based devices.
期刊介绍:
Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.