Zhichao Zhang, Weijie Chen, Xingxing Jiang, Jianlei Cao, Haidi Yang, Haiyang Chen, Fu Yang, Yunxiu Shen, Heyi Yang, Qinrong Cheng, Xining Chen, Xiaohua Tang, Shuaiqing Kang, Xue-mei Ou, Christoph J. Brabec, Yaowen Li, Yongfang Li
{"title":"用硫氰酸根离子抑制宽带隙过氧化物中的相分离,实现 25.06% 的过氧化物/有机串联效率","authors":"Zhichao Zhang, Weijie Chen, Xingxing Jiang, Jianlei Cao, Haidi Yang, Haiyang Chen, Fu Yang, Yunxiu Shen, Heyi Yang, Qinrong Cheng, Xining Chen, Xiaohua Tang, Shuaiqing Kang, Xue-mei Ou, Christoph J. Brabec, Yaowen Li, Yongfang Li","doi":"10.1038/s41560-024-01491-0","DOIUrl":null,"url":null,"abstract":"Mixed halide wide-bandgap perovskites are suitable for integration in tandem photovoltaics such as perovskite/organic tandem solar cells. However, halide phase segregation originating from halogen vacancy-assisted ion migration in wide-bandgap perovskites limits the device efficiency and lifetime. Here we incorporate pseudo-halogen thiocyanate (SCN) ions in iodide/bromide mixed halide perovskites and show that they enhance crystallization and reduce grain boundaries. Trace amount of SCN ions in the bulk enter the perovskite lattice, forming an I/Br/SCN alloy, and occupy iodine vacancies, blocking halide ion migration via steric hindrance. Taken together, these effects retard halide phase segregation under operation and reduce energy loss in the wide-bandgap perovskite cells. The resulting perovskite/organic tandem solar cell achieves a power conversion efficiency of 25.82% (certified 25.06%) and an operational stability of 1,000 h. Wide-bandgap perovskite solar cells suffer from phase segregation. Zhang et al. show that thiocyanate ions overcome the issue by occupying iodide vacancies while regulating crystallization, enabling perovskite/organic tandem cells with 25.06% efficiency.","PeriodicalId":19073,"journal":{"name":"Nature Energy","volume":"9 5","pages":"592-601"},"PeriodicalIF":49.7000,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Suppression of phase segregation in wide-bandgap perovskites with thiocyanate ions for perovskite/organic tandems with 25.06% efficiency\",\"authors\":\"Zhichao Zhang, Weijie Chen, Xingxing Jiang, Jianlei Cao, Haidi Yang, Haiyang Chen, Fu Yang, Yunxiu Shen, Heyi Yang, Qinrong Cheng, Xining Chen, Xiaohua Tang, Shuaiqing Kang, Xue-mei Ou, Christoph J. Brabec, Yaowen Li, Yongfang Li\",\"doi\":\"10.1038/s41560-024-01491-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Mixed halide wide-bandgap perovskites are suitable for integration in tandem photovoltaics such as perovskite/organic tandem solar cells. However, halide phase segregation originating from halogen vacancy-assisted ion migration in wide-bandgap perovskites limits the device efficiency and lifetime. Here we incorporate pseudo-halogen thiocyanate (SCN) ions in iodide/bromide mixed halide perovskites and show that they enhance crystallization and reduce grain boundaries. Trace amount of SCN ions in the bulk enter the perovskite lattice, forming an I/Br/SCN alloy, and occupy iodine vacancies, blocking halide ion migration via steric hindrance. Taken together, these effects retard halide phase segregation under operation and reduce energy loss in the wide-bandgap perovskite cells. The resulting perovskite/organic tandem solar cell achieves a power conversion efficiency of 25.82% (certified 25.06%) and an operational stability of 1,000 h. Wide-bandgap perovskite solar cells suffer from phase segregation. Zhang et al. show that thiocyanate ions overcome the issue by occupying iodide vacancies while regulating crystallization, enabling perovskite/organic tandem cells with 25.06% efficiency.\",\"PeriodicalId\":19073,\"journal\":{\"name\":\"Nature Energy\",\"volume\":\"9 5\",\"pages\":\"592-601\"},\"PeriodicalIF\":49.7000,\"publicationDate\":\"2024-03-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nature Energy\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.nature.com/articles/s41560-024-01491-0\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nature Energy","FirstCategoryId":"88","ListUrlMain":"https://www.nature.com/articles/s41560-024-01491-0","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
Suppression of phase segregation in wide-bandgap perovskites with thiocyanate ions for perovskite/organic tandems with 25.06% efficiency
Mixed halide wide-bandgap perovskites are suitable for integration in tandem photovoltaics such as perovskite/organic tandem solar cells. However, halide phase segregation originating from halogen vacancy-assisted ion migration in wide-bandgap perovskites limits the device efficiency and lifetime. Here we incorporate pseudo-halogen thiocyanate (SCN) ions in iodide/bromide mixed halide perovskites and show that they enhance crystallization and reduce grain boundaries. Trace amount of SCN ions in the bulk enter the perovskite lattice, forming an I/Br/SCN alloy, and occupy iodine vacancies, blocking halide ion migration via steric hindrance. Taken together, these effects retard halide phase segregation under operation and reduce energy loss in the wide-bandgap perovskite cells. The resulting perovskite/organic tandem solar cell achieves a power conversion efficiency of 25.82% (certified 25.06%) and an operational stability of 1,000 h. Wide-bandgap perovskite solar cells suffer from phase segregation. Zhang et al. show that thiocyanate ions overcome the issue by occupying iodide vacancies while regulating crystallization, enabling perovskite/organic tandem cells with 25.06% efficiency.
Nature EnergyEnergy-Energy Engineering and Power Technology
CiteScore
75.10
自引率
1.10%
发文量
193
期刊介绍:
Nature Energy is a monthly, online-only journal committed to showcasing the most impactful research on energy, covering everything from its generation and distribution to the societal implications of energy technologies and policies.
With a focus on exploring all facets of the ongoing energy discourse, Nature Energy delves into topics such as energy generation, storage, distribution, management, and the societal impacts of energy technologies and policies. Emphasizing studies that push the boundaries of knowledge and contribute to the development of next-generation solutions, the journal serves as a platform for the exchange of ideas among stakeholders at the forefront of the energy sector.
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