溶剂及器件结构对MEH-PPV与PCBM电池性能影响  

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

作　　者：於黄忠[1,2] 彭俊彪[1] 

机构地区：[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 [2]华南理工大学物理科学与技术学院,广州510640

出　　处：《物理化学学报》2007年第10期1637-1641,共5页Acta Physico-Chimica Sinica

基　　金：国家重点基础研究发展规划(973)(2002CB613405);国家自然科学基金(90201023);华南理工大学自然科学基金(E5040910)资助项目

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,结果表明,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.由其组成的光电池在80mW·cm-2强度光照下,开路电压为0.8V,短路电流密度为3.40mA·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,结果表明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)特性,原子力显微镜(AFM)图,分析了溶剂对器件性能影响的原因,并进行了合理的解释.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-l-l-phenyl-（6,6）C63 as acceptor were fabricated. A mechanism of the influence of device structure on device pefformance 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））. The short-circuit electric current and fill factor of device were also increased by adopting LiF/Al negative electricity structure, and an open circuit voltage of 0.8 V, short circuit current density of 3.40 mA ·cm^-2 and fill factor of 52.1% were obtained 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 studied. 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. The mechanism of the solvent influence on the device performance was also analyzed by light and dark I-V curve, photosensitivity, AFM, and some reasonable explainations were given.

关 键 词：太阳电池 聚合物 性能 

分 类 号：TM914.4[电气工程—电力电子与电力传动]