A new donor-acceptor-donor ternary copolymer pending additional diketopyrrolopyrrole unit in the side of a donor for efficient solar cells

作者：Tan, Hua; Yu, Junting; Wang, Yafei; Chen, Jianhua; Tao, Qiang; Liu, Yu^*; Huang, Juan; Zhu, Weiguo

来源：Organic Electronics, 2013, 14(6): 1510-1515.

DOI：10.1016/j.orgel.2013.03.018

• Polymer solar cells
• Diketopyrrolopyrrole
• Bulk heterojunction
• Donor-acceptor

A new donor-acceptor-donor ternary copolymer PTh-BDT-2DTDPP was synthesized and characterized, in which two diketopyrrolopyrrole units were simultaneously incorporated into the side and main chains. Its thermal, photophysical and electrochemical properties, as well as morphology in a blending film were investigated. The bulk heterojunction polymer solar cells were made with a configuration of ITO/PEDOT:PSS/PTh-BDT-2DTDPP:PC61BM/LiF/Al. A maximum power conversion efficiency of 4.36% with a high open-circuit voltage of 0.78 V, a short-circuit current of 10.47 mA cm (2) and a fill factor of 53.0% was achieved in the cells under the illumination of AM 1.5, 100mWcm (2).

• 出版日期2013-6
• 单位湘潭大学