| 초록 |
Although P3HT has several advantageous properties, it has a bandgap of 1.9 eV and thus harvests only 22% of available photons. To absorb photons at longer wavelengths, development of low-bandgap polymer is strongly demanded. Donor-acceptor conjugated alternating copolymers have great advantage because their electronic properties can be finely tuned by adjusting the intramolecular charge transfer between the electron donor and acceptor units. In this study, we report the synthesis and characterization of a new class of donor-acceptor alternating copolymers comprising 3-hexylthiophene and 9,9’-bifluorenylidene as an electron-donating and an electron-withdrawing unit, respectively. The pholtovolaic properties of the copolymers are measured and related with the chemical structure. |
