Drastic change of molecular orientation in a thiazolothiazole copolymer by molecular-weight control and blending with PC61BM leads to high efficiencies in solar cells.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 22213033.
- Also identified by DOI 10.1002/adma.201103065.
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Abstract
A thiazolothiazole-thiophene copolymer is examined as the active material in bulk heterojunction (BHJ) solar cells. By optimizing the molecular weight, the polymer-based cells exhibit power conversion efficiencies as high as 5.7%. The increase in molecular weight improves the orientational order, and blending with phenyl-C61-butyric acid methyl ester (PC61BM) changes the orientational motif from edge-on to face-on, which accounts for the trend in photovoltaic performances. These results might give new insight into the structure-property relationships in BHJ solar cells.
Medical subject headings
- Electric Power Supplies
- Fullerenes
- Polymers
- Solar Energy
- Thiazoles