Acta Chim. Sinica ›› 2015, Vol. 73 ›› Issue (9): 949-953.DOI: 10.6023/A15040246 Previous Articles     Next Articles

Special Issue: 非碳基二维材料



马春燕, 傅伟飞, 黄国伟, 陈红征, 徐明生   

  1. 浙江大学硅材料国家重点实验室 高分子科学与工程学系 杭州 310027
  • 投稿日期:2015-04-10 发布日期:2015-06-02
  • 通讯作者: 陈红征, 徐明生;
  • 基金资助:

    项目受浙江省自然科学基金(杰出青年基金项目: R4110030)、教育部新世纪优秀人才支持计划(No. NCET-12-0494)、高等学校博士学科点专项科研基金(No. 20130101110123)、科技部政府间国际合作项目(No. 2013DFG52800)资助.

Two-Dimensional WS2 Sheets as Interfacial Layer for High-Performance Organic Solar Cells

Ma Chunyan, Fu Weifei, Huang Guowei, Chen Hongzheng, Xu Mingsheng   

  1. State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027
  • Received:2015-04-10 Published:2015-06-02
  • Supported by:

    Project supported by Zhejiang Provincial Natural Science Foundation of China (Youth Talent Program: R4110030), the Program for New Century Excellent Talents in University (No. NCET-12-0494), the Research Fund for the Doctoral Program of Higher Education (No. 20130101110123) and the Program for 14th China-Japan S&T Cooperation (No. 2013DFG52800).

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.

Key words: two-dimensional layered materials, WS2, organic solar cells, hole extraction layer, high-performance