| 초록 |
Three D-A type quinoxaline-based conjugated polymers have been successfully synthesized by Stille coupling reaction, The electron-donating 2-ethylhexyloxy benzodithiophene (BDT) unit was linked to the electron-accepting di(m-hexyloxy) phenyl-substituted quinoxaline (m-HoDPQ) unit to afford the PBEh-HoQx. Furthermore, the electron-accepting m-HoDPQ unit was combined with the strong electron-withdrawing cyano-group. In addition, the combination of alkyl-thienyl substituted BDT unit yielded another target polymer. To observe the photovoltaic properties of the polymers, an inverted-type device with the configuration of ITO/ZnO/Polymer : Acceptor/MoO3/Ag was fabricated. It has been observed that the performances of OPVs were improved by the incorporation of the cyano-substituent. |
