Porphyrin−Dithienothiophene π-Conjugated Copolymers: Synthesis and Their Applications in Field-Effect Transistors and Solar Cells

摘要: Soluble conjugated alternating porphyrin−dithienothiophene copolymers—single-bond linked (I) and triple-bond (IIa IIb)—were synthesized by palladium(0)-catalyzed Stille Sonagashira coupling reactions, respectively. The thermal, electrochemical, optical, charge transport, photovoltaic properties of these copolymers were examined; the effect triple bond was studied. I exhibits onset decomposition temperature (Td) 410 °C glass-transition (Tg) 180 °C, higher than those IIb (Td, 330 °C; Tg, 130 °C). absorption spectrum in thin film a sharp Soret band at 450 nm two weak Q-bands 563−619 nm, while 491 strong Q-band 760 nm. emission maxima solution are located 642 722 is electrochemically active both oxidation reduction regions, shows only peak. field-effect hole mobilities as high 2.1 × 10−4 cm2 V−1 s−1 o...