Zhongyu Liu , Xiu Huang , Yuchen Zhao , Jianwei Wang , Jiaying Liu , Chenyu Zhou , Hongwei Wang , Tian Cui , Xiaohui Liu
{"title":"自交联策略实现了填充系数超过85%的高性能倒置无机钙钛矿太阳能电池","authors":"Zhongyu Liu , Xiu Huang , Yuchen Zhao , Jianwei Wang , Jiaying Liu , Chenyu Zhou , Hongwei Wang , Tian Cui , Xiaohui Liu","doi":"10.1016/j.jechem.2025.04.060","DOIUrl":null,"url":null,"abstract":"<div><div>Inorganic CsPbI<sub>3</sub> perovskite with superior thermal stability and photoelectric properties has developed into a promising candidate for photovoltaic applications. Nevertheless, the power conversion efficiency (PCE) of CsPbI<sub>3</sub> perovskite solar cells (PSCs) still lags far behind that of both organic-inorganic hybrid counterparts and the theoretical PCE limit, primarily restricted by severe fill factor (FF) and open-circuit voltage (<em>V</em><sub>OC</sub>) deficits. Herein, an in-situ self-crosslinking strategy is proposed to construct high-performance inverted inorganic PSCs by incorporating acrylate monomers as additives into CsPbI<sub>3</sub> perovskite precursors. During the thermal annealing process of perovskite films, acrylate monomers can form network structures by breaking the C=C groups through an in-situ polymerization reaction, mainly anchored at the grain boundaries (GBs) and on the surfaces of perovskite. Meanwhile, the C=O groups of acrylate polymers can favorably coordinate with uncoordinated Pb<sup>2+</sup>, thereby decreasing defect density and stabilizing the perovskite phase. Particularly, with multiple crosslinking and passivation sites, the incorporation of dipentaerythritol pentaacrylate (DPHA) can effectively improve the perovskite film quality, suppress nonradiative recombination, and block moisture erosion. Consequently, the DPHA-based PSC achieves a champion PCE of 20.05% with a record-high FF of 85.05%, both of which rank among the top in the performance of inverted CsPbI<sub>3</sub> PSCs. Moreover, the unencapsulated DPHA-based device exhibits negligible hysteresis, remarkably improved long-term storage, and operational stability. This work offers a facile and useful strategy to simultaneously promote the efficiency and device stability of inverted inorganic PSCs.</div></div>","PeriodicalId":15728,"journal":{"name":"Journal of Energy Chemistry","volume":"108 ","pages":"Pages 381-389"},"PeriodicalIF":13.1000,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Self-crosslinking strategy enabling high-performance inverted inorganic perovskite solar cells with fill factor exceeding 85%\",\"authors\":\"Zhongyu Liu , Xiu Huang , Yuchen Zhao , Jianwei Wang , Jiaying Liu , Chenyu Zhou , Hongwei Wang , Tian Cui , Xiaohui Liu\",\"doi\":\"10.1016/j.jechem.2025.04.060\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Inorganic CsPbI<sub>3</sub> perovskite with superior thermal stability and photoelectric properties has developed into a promising candidate for photovoltaic applications. Nevertheless, the power conversion efficiency (PCE) of CsPbI<sub>3</sub> perovskite solar cells (PSCs) still lags far behind that of both organic-inorganic hybrid counterparts and the theoretical PCE limit, primarily restricted by severe fill factor (FF) and open-circuit voltage (<em>V</em><sub>OC</sub>) deficits. Herein, an in-situ self-crosslinking strategy is proposed to construct high-performance inverted inorganic PSCs by incorporating acrylate monomers as additives into CsPbI<sub>3</sub> perovskite precursors. During the thermal annealing process of perovskite films, acrylate monomers can form network structures by breaking the C=C groups through an in-situ polymerization reaction, mainly anchored at the grain boundaries (GBs) and on the surfaces of perovskite. Meanwhile, the C=O groups of acrylate polymers can favorably coordinate with uncoordinated Pb<sup>2+</sup>, thereby decreasing defect density and stabilizing the perovskite phase. Particularly, with multiple crosslinking and passivation sites, the incorporation of dipentaerythritol pentaacrylate (DPHA) can effectively improve the perovskite film quality, suppress nonradiative recombination, and block moisture erosion. Consequently, the DPHA-based PSC achieves a champion PCE of 20.05% with a record-high FF of 85.05%, both of which rank among the top in the performance of inverted CsPbI<sub>3</sub> PSCs. Moreover, the unencapsulated DPHA-based device exhibits negligible hysteresis, remarkably improved long-term storage, and operational stability. This work offers a facile and useful strategy to simultaneously promote the efficiency and device stability of inverted inorganic PSCs.</div></div>\",\"PeriodicalId\":15728,\"journal\":{\"name\":\"Journal of Energy Chemistry\",\"volume\":\"108 \",\"pages\":\"Pages 381-389\"},\"PeriodicalIF\":13.1000,\"publicationDate\":\"2025-05-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Energy Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2095495625003754\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Energy\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Energy Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2095495625003754","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Energy","Score":null,"Total":0}
Self-crosslinking strategy enabling high-performance inverted inorganic perovskite solar cells with fill factor exceeding 85%
Inorganic CsPbI3 perovskite with superior thermal stability and photoelectric properties has developed into a promising candidate for photovoltaic applications. Nevertheless, the power conversion efficiency (PCE) of CsPbI3 perovskite solar cells (PSCs) still lags far behind that of both organic-inorganic hybrid counterparts and the theoretical PCE limit, primarily restricted by severe fill factor (FF) and open-circuit voltage (VOC) deficits. Herein, an in-situ self-crosslinking strategy is proposed to construct high-performance inverted inorganic PSCs by incorporating acrylate monomers as additives into CsPbI3 perovskite precursors. During the thermal annealing process of perovskite films, acrylate monomers can form network structures by breaking the C=C groups through an in-situ polymerization reaction, mainly anchored at the grain boundaries (GBs) and on the surfaces of perovskite. Meanwhile, the C=O groups of acrylate polymers can favorably coordinate with uncoordinated Pb2+, thereby decreasing defect density and stabilizing the perovskite phase. Particularly, with multiple crosslinking and passivation sites, the incorporation of dipentaerythritol pentaacrylate (DPHA) can effectively improve the perovskite film quality, suppress nonradiative recombination, and block moisture erosion. Consequently, the DPHA-based PSC achieves a champion PCE of 20.05% with a record-high FF of 85.05%, both of which rank among the top in the performance of inverted CsPbI3 PSCs. Moreover, the unencapsulated DPHA-based device exhibits negligible hysteresis, remarkably improved long-term storage, and operational stability. This work offers a facile and useful strategy to simultaneously promote the efficiency and device stability of inverted inorganic PSCs.
期刊介绍:
The Journal of Energy Chemistry, the official publication of Science Press and the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, serves as a platform for reporting creative research and innovative applications in energy chemistry. It mainly reports on creative researches and innovative applications of chemical conversions of fossil energy, carbon dioxide, electrochemical energy and hydrogen energy, as well as the conversions of biomass and solar energy related with chemical issues to promote academic exchanges in the field of energy chemistry and to accelerate the exploration, research and development of energy science and technologies.
This journal focuses on original research papers covering various topics within energy chemistry worldwide, including:
Optimized utilization of fossil energy
Hydrogen energy
Conversion and storage of electrochemical energy
Capture, storage, and chemical conversion of carbon dioxide
Materials and nanotechnologies for energy conversion and storage
Chemistry in biomass conversion
Chemistry in the utilization of solar energy