New Semiconducting Polymer Based on Benzo[1,2-b:4,5-b']diselenophene Donor and Diketopyrrolopyrrole/Isoindigo Acceptor Unit: Synthesis, Characterization and Photovoltaics

作者：Xu, Zhongjie; Shi, Guozheng; Yuan, Jianyu; Glenn, Emily; Wang, Hai-Qiao^*; Ma, Wanli

来源：Chinese Journal of Chemistry, 2015, 33(8): 909-916.

DOI：10.1002/cjoc.201500270

• semiconducting polymer
• benzo[1,2-b:4,5-b ']diselenophene
• synthesis
• characterization
• photovoltaics

Two new D-A type polymers PBDSe-DPP and PBDSe-ID were synthesized to explore new ideal semiconducting polymers, by conjugating acceptor unit diketopyrrolopyrrole/isoindigo to a donor unit benzo[1,2-b:4,5-b']diselenophene, which is designed by substituting the sulfur atom with a selenium atom in the benzo[1,2-b: 4,5-b']dithiophene. The thermal, optical, electrochemical, photoelectric and photovoltaic properties of the two polymers were studied systematically. Relatively high open circuit voltage (0.7 and 0.75 V) and fill factor (>65%) were demonstrated for both polymers. Huge increase (by 64% and 120%) of the short circuit current density was achieved for both polymer based devices by using additive compared to the corresponding reference without additive, resulting in decent power conversion efficiency of 3.7% and 2.5% respectively with only simple optimizing consideration. We believe this class of BDSe polymer possesses a good potential to be alternatives of active material for photovoltaic applications.

• 出版日期2015-8
• 单位苏州大学