High Open-Circuit Voltage Solar Cells Based on New Thieno[3,4-c]pyrrole-4,6-dione and 2,7-Carbazole Copolymers

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• 作者：Ahmed Najari ; Philippe Berrouard ; Chiara Ottone ; Mathieu Boivin ; Yingping Zou ; David Gendron ; William-Olivier Caron ; Philippe Legros ; Claudine N. Allen ; Sa茂d Sadki ; Mario Leclerc
• 刊名：Macromolecules
• 出版年：2012
• 出版时间：February 28, 2012
• 年：2012
• 卷：45
• 期：4
• 页码：1833-1838
• 全文大小：436K
• 年卷期：v.45,no.4(February 28, 2012)
• ISSN：1520-5835

文摘

New alternating copolymers derived from thieno[3,4-c]pyrrole-4,6-dione (TPD) and 2,7-carbazole moieties have been synthesized by Suzuki cross-coupling reaction and characterized. These polymers combine interesting properties such as good solubility and excellent thermal and air stability. The present studies indicate that the combination of TPD and 2,7-carbazole building blocks can be a very effective way to lower the HOMO energy level and ultimately to enhance the V_oc of polymer solar cells. The V_oc reported here (up to 1.07 V) is one of the highest observed for polymer:[60]PCBM bulk heterojunction devices, and preliminary results on the photovoltaic devices (power conversion efficiencies up to 1.8%) indicate that performance could probably be improved by increasing the molecular weights and by fine-tuning the electronic properties and the morphology.