双功能添加剂策略制备高效钙钛矿太阳电池

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中文摘要：目前针对提高钙钛矿太阳能电池(PSCs)效率的研究发展迅速,效率已经达到26％.然而,在制备高效率PSCs时经常会使用过量PbI2,过量的PbI2会导致电池的稳定性缺陷.为了解决这一问题,我们引入了阴阳离子共同作用的双功能添加剂苯乙胺三氟乙酸盐(PEATFA),来钝化钙钛矿薄膜中的缺陷和过量的PbI2,以协同钝化钙钕矿太阳能电池.PEA+阳离子促进二维钙钛矿生成,而TFA-阴离子钝化未配位的Pb2+离子和碘空位,从而提高了钙钛矿晶体质量.此外,PEATFA的引入优化了钙钛矿与空穴传输层之间的能级匹配,从而提高了其电荷传输和抽取能力.最终,我们成功实现了PSCs 24.05％的光电转换效率,同时PSCs表现出最小的滞后现象和良好的稳定性.

外文标题：Double-functional additive strategy for efficient perovskite solar cells

外文摘要：Perovskite solar cells(PSCs)efficiency has re-cently achieved significant advancements,surpassing the 26％threshold.Excessive PbI2,often used in high-efficiency PSCs,will also cause stability or defect problems.To address these challenges,we introduce anionic and cationic bifunctional additives to passivate PSCs synergistically.Phenylethylamine trifluoroacetate(PEATFA)is utilized as an additive to passi-vate the perovskite film.The PEA+cation facilitates the for-mation of two-dimensional perovskite while TFA-anion passivate the uncoordinated Pb2+ions and iodine vacancies,enhancing perovskite crystal quality without excess PbI2.Furthermore,PEATFA modification optimizes the energy le-vel matching between the perovskite and charge transfer lay-ers,thereby enhancing charge transfer and extraction capabilities.Finally,the device achieves an impressive power conversion efficiency of 24.05％while exhibiting minimal hysteresis and good stability.

外文关键词：

perovskite solar cellspassivation defectsdouble-functional additivephenethylamine trifluoroacetate

作者：

吴炯桦、杭陈旺、王仁杰、郑巧、邓辉、张彩霞、王伟煌、李冬梅、李一明、程树英

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作者单位：

College of Physics and Information Engineering,Institute of Micro-Nano Devices and Solar Cells,Fuzhou University,Fuzhou 350108,China

Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China

Key Laboratory for Renewable Energy,Chinese Academy of Sciences

Beijing Key Laboratory for New Energy Materials and Devices

Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China

Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering,Changzhou 213164,China

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关键词：

perovskite solar cells passivation defects double-functional additive phenethylamine trifluoroacetate

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Fujian ProvinceBeijing Natural Science FoundationFujian Science & Technology Innovation Laboratory Optoelectronic Information of China

项目编号：

52102217521023322021J0512022220822021ZZ124

出版年：

2024

DOI：

10.1007/s40843-024-2878-7

中国科学:材料科学(英文)

CSTPCD

ISSN：

年,卷(期)：2024.67(8)