| 초록 |
A 2,5-bis(2-thienyl)pyrrole (TPT)-based new monomer unit incorporating the electron-withdrawing 1-decanone (ketone) at the 3- and 4-positions of the pyrrole unit of TPT(≈ TPTK) was prepared and polymerized with distannyl derivatives of 4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene (BDTT), 4,7-bis(thiophen-2-yl)benzo[c][1,2,5]thiadiazole (DTBT), and 3,6-bis(thiophen-2-yl)-2,5-dioctylpyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione (DKPP), to obtain three new polymers. The photophysical, electrochemical, and energy conversion efficiency of the TPTK-based polymers were thoroughly studied and compared with those of structurally similar polymers incorporating an imide-functionalized TPT unit (≈ TPTI). Overall, the TPTK-based polymers showed a higher band-gap (2.42, 1.92, and 1.42 eV), deeper highest occupied molecular orbital (−5.58, −5.48, and −5.31 eV) energy levels and lower carrier mobilities than those of the corresponding TPTI-based polymers. |
