Comparison of photovoltaic devices based on MEH-PPV with various molecular weights  

作　　者：KANG Bonan1,2, WANG Liduo1, YANG Yong1 & QIU Yong1 1. Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua Univer- sity, Beijing 100084, China 2. State Key Laboratory on Integrated optoelectronics, Jilin University Region, Changchun 130023, China 

出　　处：《Chinese Science Bulletin》2004年第21期2259-2261,共3页

摘　　要：Polymer photovoltaic devices based on poly (2- methoxy-5-(2′ -ethyl-hexyloxy)-1,4-phenylene vinylene) (MEH- PPV) with three weight-average molecular weights (Mw) have been fabricated with the device structure of ITO/PEDOT/ MEH-PPV/Ca/Ag, and the effect of the molecular weight on photovoltaic properties has been investigated. The experi- mental results show that the high molecular weight of MEH- PPV leads to low series resistance (Rs) and high short-circuit current. The low molecular weight of MEH-PPV leads to high shunt resistance (Rsh) and high open-circuit voltage. When the molecular weight is 6×105, the highest power con- version efficiency was observed.Polymer photovoltaic devices based on poly (2- methoxy-5-(2′ -ethyl-hexyloxy)-1,4-phenylene vinylene) (MEH- PPV) with three weight-average molecular weights (Mw) have been fabricated with the device structure of ITO/PEDOT/ MEH-PPV/Ca/Ag, and the effect of the molecular weight on photovoltaic properties has been investigated. The experi- mental results show that the high molecular weight of MEH- PPV leads to low series resistance (Rs) and high short-circuit current. The low molecular weight of MEH-PPV leads to high shunt resistance (Rsh) and high open-circuit voltage. When the molecular weight is 6×105, the highest power con- version efficiency was observed.

关 键 词：MEHPPV 分子量 光电器件 载流子迁移率 串联电阻 并联电阻 聚(2-甲氧基-5-(2'-乙基-乙氧基)-1 4-亚苯基乙烯撑) 

分 类 号：O441[理学—电磁学]