Citation: Zhen Lu, Cui-hong Li, Chun Du, Xue Gong, Zhi-shan Bo. 6,7-DIALKOXY-2,3-DIPHENYLQUINOXALINE BASED CONJUGATED POLYMERS FOR SOLAR CELLS WITH HIGH OPEN-CIRCUIT VOLTAGE[J]. Chinese Journal of Polymer Science, ;2013, 31(6): 901-911. doi: 10.1007/s10118-013-1275-y shu

6,7-DIALKOXY-2,3-DIPHENYLQUINOXALINE BASED CONJUGATED POLYMERS FOR SOLAR CELLS WITH HIGH OPEN-CIRCUIT VOLTAGE

Received Date: 4 January 2013
Revised Date: 25 January 2013

Fund Project: This work was financially supported by the 973 Programs (2011CB935702 and 2009CB623603), the NSF of China (Nos. 20834006, 51003006 and 21161160443) and the Fundamental Research Funds for the Central Universities.

6,7-Dialkoxy-2,3-diphenylquinoxaline based narrow band gap conjugated polymers, poly[2,7-(9-octyl-9H-carbazole)-alt-5,5-(5,8-di-2-thinenyl-(6,7-dialkoxy-2,3-diphenylquinoxaline))] (PCDTQ) and poly[2,7-(9,9-dioctylfluorene)-alt-5,5-(5,8-di-2-thinenyl-(6,7-dialkoxy-2,3-diphenylquinoxaline))] (PFDTQ), have been synthesized by Suzuki polycondensation. Their optical, electrochemical, transport and photovoltaic properties have been investigated in detail. Hole mobilities of PCDTQ and PFDTQ films spin coated from 1,2-dichlorobenzene (DCB) solutions are 1.0?10-4 and 4.1?10-4 cm2V-1s-1, respectively. Polymer solar cells were fabricated with the as-synthesized polymers as the donor and PC61BM and PC71BM as the acceptor. Devices based on PCDTQ:PC71BM (1:3) and PFDTQ:PC71BM (1:3) fabricated from DCB solutions demonstrated a power conversion efficiency (PCE) of 2.5% with a Voc of 0.95 V and a PCE of 2.5% with a Voc of 0.98 V, respectively, indicating they are promising donor materials.
- Quinoxaline,
- Polymer solar cells,
- Photovoltaic performance,
- Carbazole,
- Fluorene
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