Synthesis of four-armed triphenylamine-based molecules and their applications in organic solar cells. (21st November 2014)

• Record Type: Journal Article
• Authors: Jia, Tao; Peng, Zuosheng; Li, Qi; Zhu, Tao; Hou, Qiong; Hou, Lintao
• Is Part Of: New journal of chemistry. Volume 39:Number 2(2015:Feb.)
• Page Start: 994
• Page End: 1000
• Publication Date: 2014-11-21
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c4nj01537a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Two wide band gap four-armed triphenylamine-based small molecule donors were synthesized and applied in organic solar cells. Abstract : Two wide band gap four-armed triphenylamine (TPA)-based molecules (SM1 and SM2) with a donor–acceptor–donor structural core and a thiophene (Th) or TPA-Th segment as the arm have been designed and synthesized by use of Stille coupling reaction to further study the relationship between the structure and properties of four-armed triphenylamine-based molecules. The thermal, photophysical, electrochemical and photovoltaic properties of the molecules are studied. To further study the electronic structure of these molecules, time-dependent density functional theory calculations for the resulting small molecules were performed by using the Gaussian 09 program suite. SM2 with the extended arm structures has stronger absorption intensity and better miscibility with commercial PCBM compared with the SM1 molecule. The organic solar cells employing SM2/[6, 6]-phenyl-C71 -butyric acid methyl ester (PC71 BM) as the active layer showed better device performances than that of SM1.