Effects of Anode Modification on the Improved Performance of Organic Solar Cells Based on Poly (3-hexylthiophene): Fullerene

  • Dr Mei-Ying Chang, Institute of Electro-Optical Engineering, National Sun Yat-Sen University, Taiwan
  • Dr Yu-Kai Han, Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, Taiwan
  • Prof Wen-Yao Huang, Institute of Electro-Optical Engineering, National Sun Yat-Sen University, Taiwan
  • Mr Yun-Leong Huang, Institute of Electro-Optical Engineering, National Sun Yat-Sen University, Taiwan
  • Mr Shih-Chin Lin, Institute of Electro-Optical Engineering, National Sun Yat-Sen University, Taiwan
  • Mr I-Fan Chen, Institute of Electro-Optical Engineering, National Sun Yat-Sen University, Taiwan
  • Prof Ping-Tsung Huang, Department of Chemistry, Fu-Jen Catholic University, Taiwan

    • Films fabricated from commercially available poly(3,4-ethylene dioxythiophene) poly(styrene sulfonate) (PEDOT:PSS) aqueous dispersions have been widely used in many electronic and optoelectronic applications. We investigated that glycerol doped PEDOT:PSS (G-PEDOT) are used for polymer solar cells based on poly(3-hexylthiophene) : [6,6]-phenyl C61 butyric acid methyl ester) (P3HT:PCBM). The structure was composed of ITO/PEDOT (adding glycerol or not)/P3HT:PCBM/Al. The power conversion efficiency was 3.5% by using G-PEDOT more than 2.3% by using PEDOT:PSS. We found Jsc was increased and Voc was not changed. The absorption spectrum and energy level of HOMO were the same by UV-Vis and AC-2. In addition, the conductivity of PEDOT:PSS layer was increasing by adding glycerol. This resulted in better charge balance and better performance of polymer solar cells.