| 초록 |
In this study, two polymer donors, PBDT-biTPD(T), PBDT-biTPD(B), composed of thienopyrroledione (TPD) derivatives, and benzodithiophene were synthesized to investigate their photovoltaic properties. PBDT-biTPD(T) and PBDT-biTPD(B) showed good solubility in common organic solvents, such as chloroform, chlorobenzene, and o-dichlorobenzene. The synthesized polymer donors showed broad absorption spectra with wide bandgap. And also, different electrochemical characteristics were observed in the synthesized polymers. Comparison with Y6 as non-fullerene acceptor, the synthesized polymers showed complementary absorption and well matched frontier molecular orbital energy levels. The Y6 based OPV inverted devices, such as ITO/ZnO/active layer/MoO3/Ag, were fabricated to evaluate photovoltaic characteristics. As a result, PBDT-biTPD(T):Y6 showed the best power conversion efficiency of 11.5 % with high short circuit current. |
