晶硅薄膜生长和转移中表面织构的形成与陷光效应研究

项目名称： 晶硅薄膜生长和转移中表面织构的形成与陷光效应研究

项目编号： No.11504392

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 王聪

作者单位： 武汉科技大学

项目金额： 24万元

中文摘要： 相比于传统晶硅太阳能电池，薄膜晶硅电池在减少硅原料消耗的同时，能够保持较高的能量转换效率，是未来晶硅电池发展的重要方向。本项目在单晶硅片上构建周期性排列的籽晶阵列，外延生长高质量晶硅薄膜。研究籽晶尺寸和周期对薄膜生长和表面织构的影响，揭示薄膜生长的动力学机制。探索晶硅薄膜完整转移的工艺，并在转移过程中同步形成上下表面的织构。分析双面织构对晶硅薄膜的减反和陷光效应，提高电池的短路电流和转换效率。通过本项目的开展，能够掌握一种廉价高效的晶硅薄膜制备技术，加强对晶硅薄膜的减反和陷光效应研究，进一步推动晶硅太阳能电池的发展。

中文关键词： 太阳能电池薄膜材料；籽晶阵列；可转移晶硅薄膜；织构；陷光效应

英文摘要： Compared to traditional crystalline silicon solar cells, thin-film crystalline silicon solar cells are able to maintain high efficiency while consuming less silicon material, which makes them an important direction for the future development of crystalline silicon solar cells. This project develops a novel route to grow high-quality crystalline silicon films via periodic seed arrays fabricated on single-crystalline silicon wafers. The effects of the seed size and period on the growth and surface texture of the films will be investigated, and the growth mechanism will be revealed. The transfer process of crystalline silicon films will be explored, and the texture on the upper and lower surfaces will be formed synchronously. The analysis on the antireflection and light trapping effect of the texture on both surfaces of the films will improve the short circuit current and conversion efficiency of the solar cells. This project provides a cheap and efficient technique of fabricating high-quality crystalline silicon films, strengthens the research on the antireflection and light trapping effect of crystalline silicon films, and promotes the development of crystalline silicon solar cells.

英文关键词： thin film solar cell materials;seed arrays;transferrable crystalline silicon films;texture;light trapping effect