中国物理B ›› 2014, Vol. 23 ›› Issue (11): 118802-118802.doi: 10.1088/1674-1056/23/11/118802

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Effects of acetone-soaking treatment on the performance of polymer solar cells based on P3HT/PCBM bulk heterojunction

刘宇譞a, 吕龙峰a, 宁宇a, 陆运章a, 鲁启鹏a, 张春梅a, 方一a, 唐爱伟b, 胡煜峰a, 娄志东a, 滕枫a, 侯延冰a   

  1. a Key Laboratory of Luminescence and Optical Information of the Ministry of Education; Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China;
    b Department of Chemistry, School of Science, Beijing Jiaotong University, Beijing 100044, China
  • 收稿日期:2014-02-25 修回日期:2014-05-10 出版日期:2014-11-15 发布日期:2014-11-15
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61275175, 61177017, and 61377028) and the National Natural Science Foundation of China for Distinguished Yong Scholars (Grant No. 61125505).

Effects of acetone-soaking treatment on the performance of polymer solar cells based on P3HT/PCBM bulk heterojunction

Liu Yu-Xuan (刘宇譞)a, Lü Long-Feng (吕龙峰)a, Ning Yu (宁宇)a, Lu Yun-Zhang (陆运章)a, Lu Qi-Peng (鲁启鹏)a, Zhang Chun-Mei (张春梅)a, Fang Yi (方一)a, Tang Ai-Wei (唐爱伟)b, Hu Yu-Feng (胡煜峰)a, Lou Zhi-Dong (娄志东)a, Teng Feng (滕枫)a, Hou Yan-Bing (侯延冰)a   

  1. a Key Laboratory of Luminescence and Optical Information of the Ministry of Education; Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China;
    b Department of Chemistry, School of Science, Beijing Jiaotong University, Beijing 100044, China
  • Received:2014-02-25 Revised:2014-05-10 Online:2014-11-15 Published:2014-11-15
  • Contact: Teng Feng, Hou Yan-Bing E-mail:FTeng@bjtu.edu.cn;ybhou@bjtu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 61275175, 61177017, and 61377028) and the National Natural Science Foundation of China for Distinguished Yong Scholars (Grant No. 61125505).

摘要:

The improvement of the acetone-soaking treatment to the performance of polymer solar cells based on the P3HT/PCBM bulk heterojunction is reported. Undergoing acetone-soaking, the PCBM does not distribute uniformly in the vertical direction, a PCBM enrichment layer forms on the top of the active layer, which is beneficial to the collection of the carriers and blocking the inverting diffusion carriers. X-ray photoelectron spectroscopy (XPS) analysis reveals that the PCBM weight ratio on the top of the active layer increases by 20% after the acetone-soaking treatment. Due to the nonuniform distribution of PCBM, the short-circuit current density, the open-circuit voltage, and the fill factor are enhanced significantly. Finally, the power conversion efficiency of the acetone-soaking device increases by 31% compared with the control device.

关键词: polymer solar cells, solvent treatment, vertical phase separation, morphology

Abstract:

The improvement of the acetone-soaking treatment to the performance of polymer solar cells based on the P3HT/PCBM bulk heterojunction is reported. Undergoing acetone-soaking, the PCBM does not distribute uniformly in the vertical direction, a PCBM enrichment layer forms on the top of the active layer, which is beneficial to the collection of the carriers and blocking the inverting diffusion carriers. X-ray photoelectron spectroscopy (XPS) analysis reveals that the PCBM weight ratio on the top of the active layer increases by 20% after the acetone-soaking treatment. Due to the nonuniform distribution of PCBM, the short-circuit current density, the open-circuit voltage, and the fill factor are enhanced significantly. Finally, the power conversion efficiency of the acetone-soaking device increases by 31% compared with the control device.

Key words: polymer solar cells, solvent treatment, vertical phase separation, morphology

中图分类号:  (Organic photovoltaics)

  • 88.40.jr
84.60.Jt (Photoelectric conversion) 64.75.St (Phase separation and segregation in thin films) 73.50.-h (Electronic transport phenomena in thin films)