| 초록 |
We have successfully synthesized four new D-π-A conjugated polymers (PBDT-QxF, PBDT-QxFCF3, PBDT-QxCN, and PBDT-QxCNCF3). Stille reaction was done to combine the 2-ethyl-hexyl-thio-thiophene modified benzodithiophene (BDT) as the main backbone of electron donor and Quinoxaline (Qx) as the main backbone of the electron acceptor. In order to improve its photovoltaic performance, various electron-withdrawing groups were incorporated to the Qx. Cyano group or Fluorine atom were substituted to the main backbone of Qx. Meanwhile, strong electron-withdrawing trifluoromethyl (CF3) groups were introduced to the phenyl groups in the Qx side chain of the reference polymers (PBDT-QxF and PBDT-QxCN) to form PBDT-QxFCF3 and PBDT-QxCNCF3, respectively. As a result, enhanced photovoltaic device performance can be achieved. |
