飞秒激光诱导表面毛化提高太阳能电池陷光效率的研究

项目名称： 飞秒激光诱导表面毛化提高太阳能电池陷光效率的研究

项目编号： No.11304065

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 韩艳华

作者单位： 哈尔滨工业大学

项目金额： 26万元

中文摘要： 利用飞秒激光诱导表面毛化以提高太阳能电池陷光效率引起了科学家们的广泛关注，相较于传统的电化学刻蚀方法，飞秒激光刻蚀诱导表面毛化具有明显的优势：所诱导的结构在提高效率方面不依赖于光的入射角和偏振态；具有高度的可重复性；适用于加工各种材料（硅、多晶硅、非晶硅和薄膜等）。而且飞秒激光加工时材料的去除主要是以蒸发汽化的方式进行，材料熔化、液相流动以及材料再凝结等过程的影响大大减小，使加工表面更为平整和光滑，因此，飞秒激光非常适合于处理薄膜太阳能电池表面毛化问题，既能提高光捕获效率又要保证薄膜的界面质量。本项目将研究利用飞秒激光诱导表面毛化的方式提高硅基太阳能电池的陷光效率，探索飞秒激光诱导半导体膜材料表面毛化的方法，并利用毛化后的材料组装太阳能电池结构，根据太阳能电池特性测试研究表面毛化结构提高太阳能电池陷光效率的机理。本课题的完成将为飞秒激光在薄膜太阳能电池方面的应用提供新思路。

中文关键词： 飞秒激光；多光束相干；自组装；条纹结构；

英文摘要： Femtosecond second laser induced surface-texturing to enhance the efficeincy of solar cells have attracted much attentions from researchers. Compare to traditional method of electrochemical etching, femtosecond laser induced surface-texturing has obvious advantages: the efficiency of enhancement is independent of incident angle and polarization of incident light, the high repeatability and widely application in almost all kinds of materials. Moreover, femtosecond laser assisted etching works in the way of evaporation and gasification, the effect of the melting, liquid flowing and re-solidification of materials are reduced, hence, the surface of the materials is much smoother. Therefore, the femtosecond laser is very suitable for solving problem of surface-texturing in the fabrication of ultra-thin film solar cells. The structures fabricated by femtosecond laser can both enhance the efficiency of solar cells and ensure the quality of the interface of the thin film. This project is intended to design textured structures on Si-based solar cells by femotosecond to improve light-traping efficiency of solar cells, it is also aimed to explore the mechanism of femtosecond laser induced surface-texturing on the surface of semiconducton. The surface-textured semiconductors film will be assembled to solar cells. We are g

英文关键词： femtosecond laser；mult-beam interfered；self-organized；ripples；