The Study on Photovoltaic Properties of Fluorine-Substituted Quinoxaline-Based Conjugated Polymers
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Quinoxaline-based conjugated polymers have been successfully synthesized by Stille coupling reaction and used for photovoltaic applications. The electron-donating indacenodithiophene (IDT) unit was linked to the quinoxaline (Qx) which consists of fluorine group. After the confirmation of the structural features, the optical and electrochemical characteristics and the photovoltaic properties of the polymers were investigated. These all polymer devices were fabricated based on an inverted-type structure with ITO/ZnO/Polymer : Acceptor/MoO3/Ag configuration. As a result, incorporation of fluorine into the quinoxaline significantly affected the photovoltaic properties. Therefore, this study can explain the correlation with fluorine substituent in the quinoxaline structure.