Syntheses and Characterization of Electroactive and Photoactive 2,7-Carbazolenevinylene-Based Conjugated Oligomers and Polymers
2004; American Chemical Society; Volume: 16; Issue: 23 Linguagem: Inglês
10.1021/cm0499390
ISSN1520-5002
AutoresJean‐François Morin, Nicolas Drolet, Ye Tao, Mario Leclerc,
Tópico(s)Organic Light-Emitting Diodes Research
ResumoThis study reports the first syntheses and characterization of 2,7-carbazolenevinylene-based oligomers and polymers. Their relatively straightforward syntheses are mainly based on Horner−Emmons or Knoevenagel coupling reaction leading to well-defined oligomers and polymers. As expected, introduction of vinylene and cyanovinylene unit into the polymer backbone decreases the band gap allowing a fine-tuning of the optical and electrical properties. These electroactive and photoactive organic materials exhibit promising performances in light-emitting devices and field-effect transistors. For instance, preliminary measurements using poly(N-(2-ethylhexyl)-2,7-carbazolenecyanovinylene-alt-2,5-dioctyloxy-1,4-phenylenevinylene) (PCCVP) have revealed orange-red emission with an intensity of 245 cd/m2 at 10 V, whereas p-type mobility of about 3.7 × 10-2 cm2/V·s and an on/off ratio as high as 106 were reached with 1,4-bis(vinylene-(N-hexyl-2-carbazole))phenylene (CPC).
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