物理化学学报 >> 2007, Vol. 23 >> Issue (10): 1637-1641.doi: 10.3866/PKU.WHXB20071028

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溶剂及器件结构对MEH-PPV与PCBM电池性能影响

於黄忠; 彭俊彪   

  1. 华南理工大学高分子光电材料及器件研究所, 特种功能材料教育部重点实验室, 广州 510640; 华南理工大学物理科学与技术学院, 广州 510640
  • 收稿日期:2007-04-10 修回日期:2007-05-19 发布日期:2007-10-01
  • 通讯作者: 彭俊彪 E-mail:psjbpeng@scut.edu.cn

The Influence of the Solvent and the Device Structure on Performance of the MEH-PPV:PCBM Solar Cell

YU Huang-Zhong; PENG Jun-Biao   

  1. Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology, Institute of Polymer Optoelectronic Materials and Devices, South China, University of Technology, Guangzhou 510640, P. R. China；School of Physics, South China, University of Technoloty, Guangzhou 510640, P. R. China
  • Received:2007-04-10 Revised:2007-05-19 Published:2007-10-01
  • Contact: PENG Jun-Biao E-mail:psjbpeng@scut.edu.cn

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摘要： 以MEH-PPV(poly(2-methoxy-5-(2'-ethylhexoxy)-1,4-phenylene vinylene))为电子给体材料, PCBM(1-(3-methoxycarbonyl)-propyl-1-1-phenyl-(6,6)C61))为电子受体材料, 制成了不同结构的共混体系太阳电池. 详细分析了器件结构对器件性能影响的物理机制, 得出了PEDOT:PSS(4083)(poly(3,4-ethylene dioxythiophene:poly(styrene sulphonic acid))的插入增大了器件的开路电压, 并有利于电荷的传输. 采用LiF/Al阴极结构提高了器件的短路电流及填充因子. 其光电池在80 mW·cm-2强度光照下, 其开路电压为0.8 V, 短路电流密度为3.40 mA·cm-2, 填充因子为52.1%, 能量转换效率为1.43%. 并研究了不同溶剂对器件性能的影响, 得出了1,2-二氯苯溶剂有利于良好体相异质结的形成, 所做器件性能最好. 用器件的光导、暗导I-V 曲线,光敏(PS)性, 原子力显微镜图(AFM), 分析了溶剂对器件影响的原因, 并进行了合理的解释.

关键词: 太阳电池； 聚合物； 性能

Abstract: The various structure solar cells based on the blend of MEH-PPV(poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene) )and PCBM(1-(3-methoxycarbonyl)-propyl-1-1-phenyl-(6,6)C61) )as acceptor were fabricated. A mechanism of the influence of device structure on device performance was analyzed in detail. The result showed an increase of open circuit voltage and improvement of electric charge transport owing to the inserting of PEDOT:PSS (4083)(poly(3,4-ethylene dioxythiophene:poly(styrene sulphonic acid)). We also raised the short-circuit electric current and fill factor of device adopting LiF/Al negative electricity structure, and obtained an open circuit voltage of 0.8 V, short circuit current density of 3.40 mA·cm-2 and fill factor of 52.1% under 100 mA·cm-2 air-mass 1.5 solar simulator illumination, yielding a 1.43%power conversion efficiency. The influence of different solvents on device performance was studieds. The results showed that 1,2-dichlorobenzene was advantageous to the formation of good body heterojunction, and the performance of the corresponding device was excellence. We also analyzed the mechanism of the solvent influence on the device performance by light and dark I-V curve, photosensitivity, AFM, and gave some reasonable explainations.

Key words: Solar cell, Polymer, Performance