有机-无机共添加增强柔性钙钛矿太阳能电池机械弯曲及环境稳定性能
Organic-inorganic Co-addition to Improve Mechanical Bending and Environmental Stability of Flexible Perovskite Solar Cells
陈甜 1罗媛 1朱刘 2郭学益 1杨英1
作者信息
- 1. 中南大学 冶金与环境学院,长沙 410083
- 2. 广东先导稀材股份有限公司,清远 511500;广东省高性能薄膜太阳能材料企业重点实验室,清远 511517
- 折叠
摘要
近年来,钙钛矿太阳能电池发展迅速,其光电转换效率(Power Conversion Efficiency,PCE)已经提高到26.1％,但是柔性钙钛矿太阳能电池(Flexible Perovskite Solar Cells,F-PSCs)的机械弯曲和环境稳定性仍然是其商业化的主要障碍.本研究通过添加琼脂糖(Agarose,AG)以改善薄膜的质量和结晶性能,系统探究了 AG对钙钛矿的作用机理,组装成的F-PSCs的PCE和机械弯曲及环境稳定性能.研究发现当AG添加浓度达到最优值3 mmol/L时,薄膜表面变得更为致密平滑,钙钛矿结晶度和吸光度增加.此时器件的陷阱态密度降到最低,电荷传输电阻低至2191 Ω,光电性能达到最佳,PCE由15.17％提升至17.30％.进一步引入TiO2纳米颗粒(0.75 mmol/L),与AG(3 mmol/L)共同作用,可以提供刚性骨架结构,增强钙钛矿层的机械性能和环境稳定性.循环弯曲1500次(半径为3 mm)后,AG/TiO2共添加器件可保持初始PCE的84.73％,远高于空白器件的9.32％;在空气中放置49 d后,该器件仍可保持初始PCE的83.27％,优于空白器件的62.21％.该研究成果为制备高效且稳定的F-PSCs提供了可能性.
Abstract
Recently,perovskite solar cells have developed marvelously of which power conversion efficiency(PCE)achieved 26.1％,but the mechanical bending and environmental stability of flexible perovskite solar cells(F-PSCs)have remained major obstacles to their commercialization.In this study,the quality and crystallization of perovskite thin films were enhanced by adding agarose(AG).The interaction mechanism,PCE,mechanical bending and environmental stability of the assembled F-PSCs were investigated.It was found that the perovskite films modified by the optimal concentration of AG(3 mmol/L)exhibited denser and smoother morphology,higher crystallinity and absorbance,the lowest defect state density,and lower charge transfer resistance of 2191 Ω.Based on the optimal photoelectric properties,PCE increased from 15.17％to 17.30％.TiO2 nanoparticles(0.75 mmol/L)were further introduced to form a synergistic interaction with AG(3 mmol/L),which provided a rigid backbone structure,and thus enhanced the mechanical and environmental stability of perovskite layers.After 1500 cycles of bending(3 mm in radius),the AG/TiO2 co-modified F-PSCs maintained 84.73％of initial PCE,much higher than the blank device(9.32％).After 49 d in the air,the optimal F-PSCs still maintained 83.27％of initial PCE,superior than the blank device(62.21％).This work provides possibility for preparing highly efficient and stable F-PSCs.
关键词
柔性钙钛矿太阳能电池/添加剂工程/弯曲稳定性/环境稳定性Key words
flexible perovskite solar cell/additive engineering/bending stability/environmental stability引用本文复制引用
基金项目
国家重点研发计划(2023YFC3906103)
国家自然科学基金(61774169)
湖南省自然科学基金面上项目(2022JJ30757)
广东省科技计划(2018B030323010)
清远市创新创业科研团队项目(2018001)
出版年
2024
国家科技期刊平台
NSTL
万方数据