Low band gap polymers for organic solar cells

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2008

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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.
Original languageEnglish
TitleOrganic Photovoltaics 7
EditorsZ.H. Kafafi, P.A. Lane
Number of pages10
Place of publicationBellingham
PublisherSPIE - International Society for Optical Engineering
Publication date2008
Pages63340T
DOIs
StatePublished

Conference

ConferenceSPIE conference on optics and photonics
CitySan Diego, CA (US)
Period01/01/06 → …
NameSPIE Proceedings Series
Number6334
CitationsWeb of Science® Times Cited: 0
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