6,7-dialkoxy-2,3-diphenylquinoxaline based conjugated polymers for solar cells with high open-circuit voltage

作者：Lu, Zhen; Li, Cui-hong^*; Du, Chun; Gong, Xue; Bo, Zhi-shan

来源：Chinese Journal of Polymer Science, 2013, 31(6): 901-911.

DOI：10.1007/s10118-013-1275-y

• Quinoxaline
• Polymer solar cells
• Photovoltaic performance
• Carbazole
• Fluorene

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 x 10(-4) and 4.1 x 10(-4) cm(2)V(-1) s(-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 V (oc) of 0.95 V and a PCE of 2.5% with a V (oc) of 0.98 V, respectively, indicating they are promising donor materials.

• 出版日期2013-6
• 单位北京师范大学; 山西大同大学