首页|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

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

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  • 国家科技期刊平台
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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.
Organic-inorganic Co-addition to Improve Mechanical Bending and Environmental Stability of Flexible Perovskite Solar Cells
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.

flexible perovskite solar celladditive engineeringbending stabilityenvironmental stability

陈甜、罗媛、朱刘、郭学益、杨英

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中南大学 冶金与环境学院,长沙 410083

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

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

国家重点研发计划国家自然科学基金湖南省自然科学基金面上项目广东省科技计划清远市创新创业科研团队项目

2023YFC3906103617741692022JJ307572018B0303230102018001

2024

10.15541/jim20230532

无机材料学报
中国科学院上海硅酸盐研究所

无机材料学报

CSTPCD北大核心
影响因子：0.768
ISSN：1000-324X
年,卷(期)：2024.39(5)
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