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Conference paper

Low band gap polymers for organic solar cells

By Bundgaard, Eva1,2; Krebs, Frederik C1,2

Edited by Lane, P.A.; Kafafi, Z.H.

From

Solar Energy Programme, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1

Risø National Laboratory for Sustainable Energy, Technical University of Denmark2

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. © (2006) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Language: English
Publisher: SPIE - International Society for Optical Engineering
Year: 2008
Proceedings: SPIE conference on optics and photonics
Series: Proceedings of Spie - the International Society for Optical Engineering
ISSN: 1996756x and 0277786x
Types: Conference paper
DOI: 10.1117/12.679012
ORCIDs: Bundgaard, Eva and Krebs, Frederik C
Keywords

Energiteknologier på vej SDG 7 - Affordable and Clean Energy

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