Direct Heteroarylation Polymerization of Low Bandgap Thiophene-Based Conjugated Polymers. Issue 1668 (19th August 2014)

• Record Type: Journal Article
• Authors: Yoon, Jiyeon; Jang, Se Hyun; Kim, Sang Yong; Kwon, Sun Jae; Guo, Jing; Kwon, Yong Ku
• Editors: Brooks, J.; Lee, C.; Li, J.; Ma, B.
• Is Part Of: MRS proceedings. Issue 1668:(2014)
• Publication Date: 2014-08-19
• Subjects: photovoltaic, -- organic, -- polymer; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/opl.2014.785
• Languages: English
• ISSNs: 0272-9172

Abstract

ABSTRACT: Direct heteroarylation polymerization was employed to synthesize a novel low bandgap polymer, used as a p-type material of polymer photovoltaic cells. To achieve low bandgap of conjugated polymers, electron donor-acceptor (D-A) alternating strategy was used. The electron-donating 3-alkylthiophene and electron-withdrawing cyanothiophene were coupled to be polymerized via direct heteroarylation polymerization. The cyano moiety of the polymer backbone allowed a strong intermolecular interaction between neighboring chains and improved the structural perfection of the crystal structure on the substrate. The solar cell devices of ITO/PEDOT:PSS/P3HT:PCBM/LiF/Al were fabricated on ITO-coated glass substrate.