Abstract
The optical, electrochemical, morphological and transport properties of a series of thiadiazinone (acceptor) and (thienyl)carbazoles (donor) containing π-extended donor-acceptor-donors (D-A-D) are presented. Systematic variations in the number of the thienyl units, the choice of branched or straight alkyl side chains and the use of a processing additive demonstrate their use as electron donors in bulk heterojunction solar cells blended with fullerene acceptors. The best power conversion efficiency (PCE) of 2.7% is achieved by adding to the D-A-D 3:fullerene blend a polydimethylsiloxane (PDMS) additive, that improves the morphology and doubles the hole mobility within the D-A-D:fullerene blend. © The Royal Society of Chemistry.
Original language | English |
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Pages (from-to) | 2358-2365 |
Number of pages | 8 |
Journal | Journal of Materials Chemistry C Materials for optical and electronic devices |
Volume | 3 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2015 |
Keywords / Materials (for Non-textual outputs)
- Fullerenes
- Heterojunctions
- Hole mobility
- Silicones
- Alkyl side chains
- Bulk heterojunction solar cells
- Donor acceptor donors
- Organic solar cell
- Polydimethylsiloxane PDMS
- Power conversion efficiencies
- Solution-processed
- Systematic variation
- Solar cells