中国物理B ›› 2010, Vol. 19 ›› Issue (3): 38602-038602.doi: 10.1088/1674-1056/19/3/038602

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Photocurrent analysis of organic photovoltaic cells based on CuPc/C60 with Alq3 as a buffer layer

王娜娜, 于军胜, 臧月, 蒋亚东   

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China
  • 收稿日期:2009-08-06 修回日期:2009-09-07 出版日期:2010-03-15 发布日期:2010-03-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (NSFC) (Grant Nos.~60736005 and 60425101-1), the Foundation for Innovative Research Groups of the NSFC (Grant No.~60721001), Provincial Project (Grant No.~9140A02060609DZ0208), Program for New Century Excellent Talents in University (Grant No.~NCET-06-0812), SRF for ROCS, SEM (Grant No.~GGRYJJ08-05), and Young Excellent Project of Sichuan Province (Grant No.~09ZQ026-074).

Photocurrent analysis of organic photovoltaic cells based on CuPc/C60 with Alq3 as a buffer layer

Wang Na-Na(王娜娜), Yu Jun-Sheng(于军胜)†, Zang Yue(臧月), and Jiang Ya-Dong(蒋亚东)‡   

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China
  • Received:2009-08-06 Revised:2009-09-07 Online:2010-03-15 Published:2010-03-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (NSFC) (Grant Nos.~60736005 and 60425101-1), the Foundation for Innovative Research Groups of the NSFC (Grant No.~60721001), Provincial Project (Grant No.~9140A02060609DZ0208), Program for New Century Excellent Talents in University (Grant No.~NCET-06-0812), SRF for ROCS, SEM (Grant No.~GGRYJJ08-05), and Young Excellent Project of Sichuan Province (Grant No.~09ZQ026-074).

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摘要： The performance of an organic photovoltaic (OPV) cell based on copper phthalocyanine CuPc/C60 with a tris-(8-hydroxyquinolinato) aluminum (Alq3) buffer layer has been investigated. It was found that the power conversion efficiency of the device was 1.51% under illumination with an intensity of 100 mW/cm2, which was limited by a square-root dependence of the photocurrent on voltage. The photocurrent--optical power density characteristics showed that the OPV cell had a significant space-charge limited photocurrent with a varied saturation voltage and a three quarters power dependence on optical power density. Also, the absorption spectrum was measured by a spectrophotometer, and the results showed that the additional Alq3 layer has a minor effect on photocurrent generation.

Abstract: The performance of an organic photovoltaic (OPV) cell based on copper phthalocyanine CuPc/C60 with a tris-(8-hydroxyquinolinato) aluminum (Alq3) buffer layer has been investigated. It was found that the power conversion efficiency of the device was 1.51% under illumination with an intensity of 100 mW/cm2, which was limited by a square-root dependence of the photocurrent on voltage. The photocurrent--optical power density characteristics showed that the OPV cell had a significant space-charge limited photocurrent with a varied saturation voltage and a three quarters power dependence on optical power density. Also, the absorption spectrum was measured by a spectrophotometer, and the results showed that the additional Alq3 layer has a minor effect on photocurrent generation.

Key words: organic photovoltaic (OPV) cells, buffer layer, Alq3, space-charge limited current

中图分类号:  (Photoelectric conversion)

  • 84.60.Jt
72.40.+w (Photoconduction and photovoltaic effects) 77.22.Jp (Dielectric breakdown and space-charge effects) 85.30.De (Semiconductor-device characterization, design, and modeling)