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Synthesis and characterization of 2,1,3-benzothiadiazole-thieno[3,2-b]thiophene-based charge transferred-type polymers for photovoltaic application
- Source :
- Solar Energy Materials and Solar Cells. 93:1932-1938
- Publication Year :
- 2009
- Publisher :
- Elsevier BV, 2009.
-
Abstract
- New low-band-gap copolymers, including thieno[3,2-b]thiophene and 2,1,3-benzothiadiazole, were synthesized as photovoltaic materials. Thiophene was introduced to provide extended π-conjugation length and charge transfer properties. A band gap ( E g op =1.62 eV, E g ec =1.51 eV) of this polymer was investigated through UV–vis spectroscopy and cyclic voltammetry. A bulk heterojunction structure of glass/indium tin oxide (ITO)/PEDOT:PSS/polymer-PCBM(1:3)/LiF/Al was fabricated for investigating photovoltaic properties. PC 71 BM was used as an acceptor material, due to its increased absorption in the visible region, in comparison with PC 61 BM. In this polymer, incident photon-to-current conversion efficiency (IPCE) was as high as 50%. Moreover, maximum power conversion efficiency (PCE) of up to 1.72% was achieved under AM 1.5 G conditions. It demonstrated relatively high V OC (0.67 V) and J SC (6.86 mA/cm 2 ), while a low fill factor value (0.37) was obtained.
- Subjects :
- Materials science
Organic solar cell
Renewable Energy, Sustainability and the Environment
Band gap
Energy conversion efficiency
Analytical chemistry
Acceptor
Polymer solar cell
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Indium tin oxide
chemistry.chemical_compound
PEDOT:PSS
chemistry
Thiophene
Subjects
Details
- ISSN :
- 09270248
- Volume :
- 93
- Database :
- OpenAIRE
- Journal :
- Solar Energy Materials and Solar Cells
- Accession number :
- edsair.doi...........e0ba4d6ba068cb8c267941aede69c83c