中国物理B ›› 2003, Vol. 12 ›› Issue (4): 426-432.doi: 10.1088/1009-1963/12/4/315

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Effect of crystalline microstructure on the photophysical performance of polymer/perylene composite films

吉野勝美1, 封伟2, 周峰2, 王晓工2, 徐友龙3, 易文辉3   

  1. (1)Department of Electronic Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan; (2)Institute of Polymer Science and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China; (3)School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
  • 收稿日期:2002-11-22 修回日期:2002-12-20 出版日期:2003-04-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the Foundation for Overseas Returnee of Chinese Education Ministry (Grant No 2001345) and the Postdoctoral Science Foundation of China (Grant No 2002032055).

Effect of crystalline microstructure on the photophysical performance of polymer/perylene composite films

Feng Wei (封伟)a, Xu You-Long (徐友龙)b, Yi Wen-Hui (易文辉)b, Zhou Feng (周峰)a, Wang Xiao-Gong (王晓工)a, Yoshino Katsumi (吉野勝美)c    

  1. a Institute of Polymer Science and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China; b School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China; c Department of Electronic Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan
  • Received:2002-11-22 Revised:2002-12-20 Online:2003-04-16 Published:2005-03-16
  • Supported by:
    Project supported by the Foundation for Overseas Returnee of Chinese Education Ministry (Grant No 2001345) and the Postdoctoral Science Foundation of China (Grant No 2002032055).

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摘要： To obtain high carrier mobility, better charge injection capability, and high photovoltaic device conversion efficiency, a powerful strategy is to improve the morphology of the polymer/dye composite films. Conjugated conducting polymer (CP) thin films doped with perylene derivative (PV) of various concentrations were prepared by spin-casting method, and their morphology and photovoltaic characteristics were examined. The change in morphology and molecular reorientation occurring in CP-PV composite films upon annealing at different temperatures was investigated using scanning electron microscopy, x-ray diffraction, Fourier transform infrared and UV-vis absorption. By changing the annealing temperature, PV microcrystallines of 8－10μm in size lying parallel to the substrate surface can be obtained. Annealing effect improved the photovoltaic performance of ITO/CP-PV/Al Schottky-type solar cells, which can be attributed to the formation of an electron conducting PV crystal network. Preliminary studies indicate that the morphological structure in CP-PV composite films has an important influence to their photovoltaic properties.

Abstract: To obtain high carrier mobility, better charge injection capability, and high photovoltaic device conversion efficiency, a powerful strategy is to improve the morphology of the polymer/dye composite films. Conjugated conducting polymer (CP) thin films doped with perylene derivative (PV) of various concentrations were prepared by spin-casting method, and their morphology and photovoltaic characteristics were examined. The change in morphology and molecular reorientation occurring in CP-PV composite films upon annealing at different temperatures was investigated using scanning electron microscopy, x-ray diffraction, Fourier transform infrared and UV-vis absorption. By changing the annealing temperature, PV microcrystallines of 8－10μm in size lying parallel to the substrate surface can be obtained. Annealing effect improved the photovoltaic performance of ITO/CP-PV/Al Schottky-type solar cells, which can be attributed to the formation of an electron conducting PV crystal network. Preliminary studies indicate that the morphological structure in CP-PV composite films has an important influence to their photovoltaic properties.

Key words: morphology, organic photovoltaic device, conducting polymer composite, perylene, annealing

中图分类号:  (Kinetics of defect formation and annealing)

  • 61.72.Cc
68.37.Hk (Scanning electron microscopy (SEM) (including EBIC)) 73.50.Pz (Photoconduction and photovoltaic effects) 73.61.Ph (Polymers; organic compounds) 78.30.Jw (Organic compounds, polymers) 78.40.Me (Organic compounds and polymers)