双功能添加剂策略制备高效钙钛矿太阳电池
Double-functional additive strategy for efficient perovskite solar cells
吴炯桦 1杭陈旺 1王仁杰 1郑巧 1邓辉 1张彩霞 1王伟煌 1李冬梅 2李一明 2程树英3
作者信息
- 1. 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
- 2. 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
- 3. 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;Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering,Changzhou 213164,China
- 折叠
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.
Abstract
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.
关键词
perovskite solar cells/passivation defects/double-functional additive/phenethylamine trifluoroacetateKey words
perovskite solar cells/passivation defects/double-functional additive/phenethylamine trifluoroacetate引用本文复制引用
基金项目
National Natural Science Foundation of China(52102217)
National Natural Science Foundation of China(52102332)
Natural Science Foundation of Fujian Province(2021J05120)
Beijing Natural Science Foundation(2222082)
Fujian Science & Technology Innovation Laboratory Optoelectronic Information of China(2021ZZ124)
出版年
2024
NETL
NSTL
万方数据