摘要
太阳能电池是通过光电效应或者光化学效应直接或间接地将太阳光转化为电能的装置.太阳能电池减反膜可以减少太阳能电池表面的反射损失,提高其光电转换效率.介绍了一种环氧树脂材料的复合光栅结构减反膜的低成本制备方法.通过激光直写光刻方法制备微米结构光栅模板,用软膜压印方法将微米尺度的光栅模板图案压印到预先拉伸的二甲基硅氧烷薄膜上,固化、脱模和衬底收缩后可使光栅周期大大减小.通过等离子体表面改性法使收缩后的光栅表面产生褶皱纳米光栅结构,形成复合光栅图案.通过软膜压印方法将复合光栅图案转移到环氧树脂减反膜上.实验结果表明,与原微米尺度的光栅减反膜相比,制备的复合光栅减反膜可以将商用晶硅太阳能电池的相对转换效率提升4.26%,相对反射率减小19.43%,并且可以将减反膜表面的水滴接触角提高16°,这将增强太阳能电池的自清洁性能.
Solar cells are devices that directly or indirectly convert sunlight into electric energy through photoelectric effect or photochemical effect. Antireflection film in solar cells can reduce the reflection loss of solar cell surface and improve its photoelectric conversion efficiency. In this paper, a low-cost method of fabricating antireflection film with composite grating structure of epoxy resin is introduced. The micron structure grating template is made by laser direct writing lithography method, and the micron-scale grating template pattern is imprinted on the pre-stretched dimethylsiloxane(PDMS) film by the soft film imprinting method. The grating period can be greatly reduced after curing, demoulding and substrate shrinking. By plasma surface modification method, the wrinkled nano grating structure is formed on the contracted grating surface to form a composite grating pattern. The composite grating pattern was transferred to the antireflection film of epoxy resin by soft film imprinting. The experimental results show that, compared with the original micron scale grating antireflection film, the composite grating antireflection film can improve the relative conversion efficiency of commercial crystalline silicon solar cells by 4.26%, reduce the relative reflectivity by 19.43%, and increase the water droplet contact angle of the antireflection film by 16°, which will enhance the self-cleaning effect of solar cells.
作者
周伯川
方朝龙
张耀举
ZHOU Bochuan;FANG Chaolong;ZHANG Yaoju(College of Computer Science and Artificial Intelligence,Wenzhou University,Wenzhou,China 325035;College of Electrical and Electronic Engineering,Wenzhou University,Wenzhou,China 325035;School of Electronics and Communication Engineering,Quanzhou University of Information Engineering,Quanzhou,China 362000)
出处
《温州大学学报（自然科学版）》
2022年第3期51-62,共12页
Journal of Wenzhou University(Natural Science Edition)
基金
温州市科技计划项目(S20180015)
浙江省大学生科技创新活动计划(2019R429044)。
关键词
太阳能电池减反膜
复合光栅结构
软膜压印
转换效率
Solar Cell Antireflection Film
Composite Grating Structure
Soft Film Imprinting
Conversion Efficiency
