Effect of annealing on the characteristics of organic solar cells: Polymer blends with a 2-vinyl-4,5-dicyanoimidazole derivative

被引:56
作者
Kietzke, Thomas
Shin, Richard Yee Cheong
Egbe, Daniel Ayuk Mbi
Chen, Zhi-Kuan
Sellinger, Alan
机构
[1] Inst Mat Res & Engn, Singapore 117602, Singapore
[2] Univ Jena, Inst Organ Chem & Macromol Chem, D-07743 Jena, Germany
关键词
D O I
10.1021/ma0706273
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Photovoltaic cells based on blends of either regioregular poly(3-hexylthiophene-2,5-diyl) (P3HT) or a poly(phenylenevinylene) (A-PPE-PPV) derivative as electron donors with a novel electron acceptor based on 2-vinyl-4,5-dicyanoimidazole (Vinazene) have been investigated in detail. We found a strong influence of annealing conditions on the thin-film nanostructure and device performance. By adjusting the material combinations, external quantum efficiencies between 12 and 15% and energy conversion efficiencies of 0.5% could be reached. Though comparable efficiencies with both donor polymers could be obtained with the Vinazene derivative as acceptor, we found strong indications that different mechanisms are limiting the device efficiency.
引用
收藏
页码:4424 / 4428
页数:5
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