Dithieno[2,3-d:2′,3′-d′]naphtho[2,1-b:3,4-b′]dithiophene based medium bandgap conjugated polymers for photovoltaic applications

作者：Yang, Chunyan; Li, Huijuan; Tong, Junfeng; Li, Jianfeng; Zhang, Peng; Xia, Yangjun^*

来源：Journal of Applied Polymer Science, 2016, 133(15): 43288.

DOI：10.1002/app.43288

• applications
• optical and photovoltaic applications
• properties and characterization

Three novel medium band gap (MBG) conjugated polymers (CPs) (named as P1, P2, and P3, respectively) were developed by copolymerizing 2,7-dibromo-10,11-di(2-hexyldecyloxy)dithieno[2,3-d:2,3-d]naphtho[2,1-b:3,4-b]dithiophene (NDT-Br) with three different units: 2,5-bis(tributylstannyl)thiophene, 2,5-bis(trimethylstannyl)thieno[3,2-b]thiophene and trans-1,2-bis(tributylstannyl)ethene, respectively. The thermal, optical, and electrochemical properties of the polymers were investigated. All of the polymers have good thermal stability and medium band gap (approximate to 1.9 eV). Prototype bulk heterojunction photovoltaic cells based on the blend P1/P2/P3 and [6, 6] phenyl-C61 butyric acid methyl ester (PC61BM) were assembled and the photovoltaic properties were assessed. Power conversion efficiencies (PCEs) of 1.61% approximate to 2.43% have been obtained under 100 mW cm(-2) illumination (AM1.5).

• 出版日期2016-4-15
• 单位兰州交通大学