Synthesis and Characterization of Conjugated Polymers Based on Two Dimensional 5,6-Difluoro-benzo-2,1,3-thiadiazole with Thiophene Units and Silolobis(selenophene) Based Conjugated Polymers

• Main Authors: Yang, Cheng-Tai, 楊鎮臺
• Other Authors: Hsu, Chain-shu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/fs8kmm

碩士 === 國立交通大學 === 應用化學系碩博士班 === 104 === In this study, two series of conjugated polymers were synthesized for the application of organic thin film transistors (OTETs) and organic solar cells (OSCs). For the first series, perylene and dithienylbenzothiadiazole (DTBT) were introduced to the side chain of poly(5,6-difluoro-benzo-2,1,3-thiadiazole co-quaterthiophene) (PTh4FBT) to obtain two types of copolymers, i.e. PTh4FBT-PERY, PTh4FBT-DTBT. The obtained polymers were characterized by UV, CV, DSC, TGA, X-ray diffraction and their performance in OTFTs and OSCs. Both PTh4FBT-PERY and PTh4FBT-DTBT show the mobilities of 4.04 × 10-1 cm2 V-1 s-1 and 1.08 × 10-1 cm2 V-1 s-1 respectively. The mobility of PTh4FBT-PERY is higher than that (2.89 × 10-1 cm2 V-1 s-1) of PTh4FBT. The PCE values of PTh4FBT-PERY and PTh4FBT-DTBT based OPV devices are 5.0% and 4.97% respectively. For the second series, silolo[3,2-b:4,5-b']bis(selenophene)(DSS) were used as an electron donor unit and it was copolymerized with dithienodiketopyrrolopyrrole (DPP) containing octyl and 2-ethylhexyl side chains to obtain two alternating copolymers, i.e. PDSSDPP-C2C6 and PDSSDPP-C8. The obtained polymers were characterized by UV, CV, DSC, TGA, X-ray diffraction and their OTFTs performance. Both PDSSDPP-C2C6 and PDSSDPP-C8 show the mobilities of 2.67 × 10-2 cm2 V-1 s-1 and 2.47 × 10-2 cm2 V-1 s-1 respectively.Both values are higher than that (3.89 × 10-3 cm2 V-1 s-1) of homologue PDTSDPP-C8.