中文摘要：

化学剥离的硫化钨二维层状材料在经过紫外臭氧处理后用作有机太阳能电池的空穴传输层,可以显著提高电池器件的光电转化效率至8.37%;作为空穴传输层,硫化钨二维层状材料可以与经典的空穴传输材料PEDOT：PSS相媲美.利用X射线光电子能谱（XPS）、拉曼光谱（Raman）、原子力显微镜（AFM）对硫化钨的结构和形貌进行分析.结果表明,紫外臭氧处理过后,氧原子能填充硫化钨因锂插层剥离而产生的硫空位,减少它的缺陷,并且使其部分被氧化,从而改善硫化钨的电学性能.

英文摘要：

Two-dimensional layered WS2 sheets is used as the hole extraction layer（HEL） in organic solar cells（OSCs）. We find that UV-ozone treatment of the chemically exfoliated WS2 sheets can significantly improve the device performance of the OSCs with the power conversion efficiency（PCE） of about 8.37%, which is comparable to the OSCs with the standard PEDOT：PSS as the HEL. We attribute the improvement to the incorporation of oxygen into the lattice of the WS2 sheets. The oxygen incorporation reduces the lattice vacancies of WS2 sheets and makes the WS2 partially oxidized and consequently improves the electrical properties of the WS2 sheets.