寻找提升电池效率的廉价表面修饰方法是降低太阳能电池成本的途径之一。以低廉的纸基材料制成的具有雾度的高透明膜，可覆在电池表面用于提高电池效率，为高效率太阳能电池的低成本表面修饰提供了条件。然而，如何解决纸基透明膜的高透光率和高雾度之间的矛盾，是其成功用于提升电池效率的关键。本项目以纸基高透明膜为对象，从微米级木质纤维出发，以纤维与纸基高透明膜的结构为切入点，研究其雾度形成机制。主要内容：以木质纤维为原料，通过纤维化学和机械处理，纸页抄造与后加工等方法，对纤维与纸基高透明膜的结构进行调控；研究影响纸基高透明膜雾度的纤维与透明膜的主要结构参数，并探究它们与雾度之间的内在关联，以期阐明纸基高透明膜的雾度形成机制；构筑高雾度纸基高透明膜并表征其理化性能，评价该纸基高透明膜对太阳能电池效率的增强作用。本研究将为高雾度纸基高透明膜的构筑提供科学依据，并对降低高效率太阳能电池的生产成本具有重要的现实意义。

Effective and inexpensive surface modifications of solar cells are of significance for reducing their production cost. An inexpensive surface modification to enhance the power conversion efficiency is achieved by laminating a low cost transparent and hazy lignocellulosic fiber-based film onto the surface of solar cells. However, the trade-off between high transparency and high transmission haze of lignocellulosic fiber-based film is still a challenge for its application in the enhancement of cell efficiency. This study aims to unveil the haze formation mechanism of a transparent film made of microscale lignocellulosic fibers by rationally regulating the fiber structure and the configuration of the transparent film. The main research contents are as follows: firstly, the fiber structure is modulated by chemical and mechanical treatments, while the configuration of the transparent film is tailored by a combination of papermaking technology and paper-converting methods. Secondly, the relationship between the main structural parameters of wood fibers and transparent film and transmission haze is correlated according to the experimental data, intending to unravel the haze formation mechanism of the transparent lignocellulosic fiber-based film. Lastly, highly transparent lignocellulosic fiber-based film with high transmission haze is prepared according to the obtained haze formation mechanism and its physical properties are characterized by various analytical instruments. In addition, the effect of the highly transparent lignocellulosic fiber-based film with high transmission haze on the cell efficiency is evaluated in detail. This study will provide a scientific basis for the fabrication of highly transparent, highly hazy lignocellulosic fiber-based film, and make a significant contribution to reducing the production cost of solar cells with high efficiency.