Donor-Acceptor (D-A) type conjugated polymers are very popular for potential applications such as organic light emitting diodes, solar cells, electrochromic devices and organic field effect transistors.1,2 In literature, there are several studies of organic solar cells of quinoxaline-based conjugated polymers. Quinoxaline is a strong electron-withdrawing unit resulting in promising acceptor features. Alkoxybenzene groups are introduced to this acceptor moiety for solution processability of quinoxaline comprising copolymers.3,4 The incorporation of selenophene into the polymer backbone as the π-bridge results in low band gap polymers as compared to sulfur and oxygen containing counterparts. In the meantime, furan based polymers have lower HOMO energy level than thiophene counterparts due to high electronegativity of oxygen compared to sulfur atom5. Hence, selenophene and furan units were selected as π-bridges. In this study, quinoxaline and benzodithiophene based conjugated polymers were synthesized via Stille polycondensation reaction. Electrochemical and spectroelectrochemical studies were performed. The structures of the polymers were illustrated in Scheme 1.

Syntheses, electrochemical and spectroelectrochemical characterizations of quinoxaline-based conjugated polymers for organic photovoltaics

253rd National Meeting (2017)

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