1. High Open-Circuit VoltageSolar Cells Based on New Thieno[3,4-c]pyrrole-4,6-dioneand 2,7-Carbazole Copolymers.
- Author
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Najari, Ahmed, Berrouard, Philippe, Ottone, Chiara, Boivin, Mathieu, Zou, Yingping, Gendron, David, Caron, William-Olivier, Legros, Philippe, Allen, Claudine N., Sadki, Saïd, and Leclerc, Mario
- Subjects
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ELECTRONIC circuits , *SOLAR cells , *PYRROLES , *CARBAZOLE , *COPOLYMERS , *ORGANIC synthesis , *SOLUBILITY , *PHOTOVOLTAIC power systems , *MOLECULAR weights - Abstract
New alternating copolymers derived from thieno[3,4-c]pyrrole-4,6-dione (TPD) and 2,7-carbazole moieties havebeen synthesized by Suzuki cross-coupling reaction and characterized.These polymers combine interesting properties such as good solubilityand excellent thermal and air stability. The present studies indicatethat the combination of TPD and 2,7-carbazole building blocks canbe a very effective way to lower the HOMO energy level and ultimatelyto enhance the Vocof polymer solar cells.The Vocreported here (up to 1.07 V) isone of the highest observed for polymer:[60]PCBM bulk heterojunctiondevices, and preliminary results on the photovoltaic devices (powerconversion efficiencies up to 1.8%) indicate that performance couldprobably be improved by increasing the molecular weights and by fine-tuningthe electronic properties and the morphology. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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