中国物理B ›› 2005, Vol. 14 ›› Issue (5): 1032-1035.doi: 10.1088/1009-1963/14/5/031

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Efficient photovoltaic cells from low band-gap fluorene-based copolymer　　　　　　　　　　　　

阳仁强1, 彭俊彪2, 曹镛2, 田仁玉3   

  1. (1)Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China; (2)Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China; Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology (South China University of Technology), Ministry of Education, Guangzhou, 510640, China; (3)Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China; Department of Applied Physics, South China University of Technology, Guangzhou 510640, China
  • 收稿日期:2004-07-09 修回日期:2004-11-08 出版日期:2005-05-19 发布日期:2005-05-19
  • 基金资助:
    国家自然科学基金(90201023)和华南理工大学自然科学基金(E5123286)资助

Efficient photovoltaic cells from low band-gap fluorene-based copolymer

Tian Ren-Yu (田仁玉)ab, Yang Ren-Qiang (阳仁强)a, Peng Jun-Biao (彭俊彪)ac, Cao Yong (曹镛)ac    

  1. a Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China; b Department of Applied Physics, South China University of Technology, Guangzhou 510640, China; c Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology (South China University of Technology), Ministry of Education, Guangzhou, 510640, China
  • Received:2004-07-09 Revised:2004-11-08 Online:2005-05-19 Published:2005-05-19
  • Supported by:
    国家自然科学基金(90201023)和华南理工大学自然科学基金(E5123286)资助

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摘要： Polymer photovoltaic cells based on low band-gap copolymer, poly[2,7-(9,9-dioctyl)fluorene-co-5,5’-(4,7-diselenophenyl)-2,2’-yl-2,1,3-benzothiadiazole] (PFSeBT), were investigated, focusing on the effects of cathode and blend concentration on device performances. The best device, with active layer from PFSeBT: PCBM=1:2 blend and with LiF/Al as cathode, shows an open-circuit voltage of 1.00 V, a short short-circuit current density of 4.42 mA/cm2, and energy conversion efficiency of 1.67% under AM1.5 illumination (100 mW/cm2). The short-circuit current density shows the dependence of power law dependence to on the incident light intensity with the power index of 0.887. All devices show spectral response until up to 680 nm. The results indicate that PFSeBT is a potential polymer functioning as electron donor in polymer photovoltaic cells.

关键词: Polymer photovoltaic cell, low band-gap copolymer, spectral response

Abstract: Polymer photovoltaic cells based on low band-gap copolymer, poly[2,7-(9,9-dioctyl)fluorene-co-5,5’-(4,7-diselenophenyl)-2,2’-yl-2,1,3-benzothiadiazole] (PFSeBT), were investigated, focusing on the effects of cathode and blend concentration on device performances. The best device, with active layer from PFSeBT: PCBM=1:2 blend and with LiF/Al as cathode, shows an open-circuit voltage of 1.00 V, a short short-circuit current density of 4.42 mA/cm2, and energy conversion efficiency of 1.67% under AM1.5 illumination (100 mW/cm2). The short-circuit current density shows the dependence of power law dependence to on the incident light intensity with the power index of 0.887. All devices show spectral response until up to 680 nm. The results indicate that PFSeBT is a potential polymer functioning as electron donor in polymer photovoltaic cells.

Key words: Polymer photovoltaic cell, low band-gap copolymer, spectral response

中图分类号: 

  • 7240