Low band gap polymers for organic solar cells

被引：0
|
作者：
Bundgaard, Eva [1 ,2 ]
Krebs, Frederik C. [1 ]
机构：
[1] Riso Natl Lab, Danish Polymer Ctr, POB 49, DK-4000 Roskilde, Denmark
[2] Roskilde Univ, Inst Biol & Chem, DK-4000 Roskilde, Denmark
来源：
ORGANIC PHOTOVOLTAICS VII | 2006年 / 6334卷
关键词：
low band gap polymers; ultraviolet photoelectron spectroscopy (UPS); organic solar cells;
D O I：
10.1117/12.679012
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The synthesis of copolymers based on thiophene, benzothiadiazole and benzo-bis-thiadiazole are described. The polymers were obtained by employing Stille cross coupling polymerization. The polymers were characterized by NMR, size exclusion chromatography, UV-vis and ultraviolet photoelectron spectroscopy. The results obtained from UV-vis and ultraviolet photoelectron spectroscopy showed band gaps of 2.1-1.7 eV for polymers based on benzothiadiazole and 0.7 eV for polymers based on benzo-bis-thiadiazole. Furthermore the results showed that the band gap decreases with an increase in the number, n, of thiophenes in the polymer repeating unit (n= 1-4). Large area photovoltaic devices were prepared and the results of these devices are described.
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页数：10
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