寡聚芴及含茚噻吩寡聚物之合成、性質與應用

趙登志

doi:10.6342/NTU.2006.00335

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寡聚芴及含茚噻吩寡聚物之合成、性質與應用

Syntheses, Properties and Applications of homologous oligofluorenes and indenothiophene-embedded oligomers

趙登志 , Ph.D　　Advisor：汪根欉　　

繁體中文 DOI： 10.6342/NTU.2006.00335

寡聚芴；有機發光二極體；載子傳輸率； oligofluorene ； indenothiophene ； OLED ； mobility

Abstract │ Reference (72) │ Times Cited (5) │ Altmetrics

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We have successfully synthesized homologous series of oligofluorenes with variety of C9 substituents and backbone lengths by successive Suzuki coupling reactions. The correlation between molecular structure and physical properties including thermal stability, fluorescent quantum yields, and emission wavelength etc, has been investigated systematically for probing the structure-physical property relationship. The bulky and rigid 9,9-diaryl substituents are significantly beneficial for their high morphological and thermal stability. The emission maxima of these oligomers were lying on the blue region and closely dependent on the conjugation length. Cyclic voltammetry experiments reveal that these oligofluorenes exhibit potential ambipolar carrier transport property. These intriguing characteristics render them as the most promising candidates for OLEDs. The UV-OLED and red electrophosphorecent devices have been achieved using these oligomers as emitter or host materials.
On the other hand, We have also successfully synthesized a series of thiophene-embedded conjugated oligomer with variety of backbone lengths by successive Negishi and Suzuki coupling reactions. The physical properties of these novel oligofluorene analogues are significantly altered upon introducing thiophene units as constituents. The presence of the thiophene and their coplanarity with adjacent phenylene rings provides these molecules with promising properties. We are presently fabricating light-emitting devices that incorporate these molecules as active materials.

Reference ( 72 ) 〈TOP〉

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