Synthesis and Characterization of Spiro-Triphenylamine Configured Polyfluorene Derivatives with Improved Hole Injection
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- 作者：Doojin Vak ; Jang Jo ; Jieun Ghim ; Chaemin Chun ; Bogyu Lim ; Alan J. Heeger ; Dong-Yu Kim
- 刊名：Macromolecules
- 出版年：2006
- 出版时间：September 19, 2006
- 年：2006
- 卷：39
- 期：19
- 页码：6433 - 6439
- 全文大小：168K
- 年卷期：v.39,no.19(September 19, 2006)
- ISSN：1520-5835
文摘
We report on the synthesis of a spiro-fluorene derivative with bulky tert-butyl-substitutedtriphenylamine structure. The compound was synthesized in an attempt to enhance both hole injection and physicalproperties. A series of copolymers of the compound and a spiro-anthracenefluorene structure were synthesized,and their physical, optical, and electrochemical characteristics were investigated. The polymers showed goodthermal stability with decomposition temperatures in excess of 389 
C and high glass transition temperatures inthe range of 112-207 C. The emission characteristics of the polymers were similar to that of dialkyl polyfluorenes.Cyclic voltametry studies revealed that the energy level of polymers can be tuned by adjusting thespiro-triphenylamine content with a tuning range of about 0.5 eV. Organic light-emitting diodes were fabricatedusing the polymers. All of the devices showed an emission in the deep blue region, and the copolymers showedimproved hole injecting/transporting characteristics.
C and high glass transition temperatures inthe range of 112-207 C. The emission characteristics of the polymers were similar to that of dialkyl polyfluorenes.Cyclic voltametry studies revealed that the energy level of polymers can be tuned by adjusting thespiro-triphenylamine content with a tuning range of about 0.5 eV. Organic light-emitting diodes were fabricatedusing the polymers. All of the devices showed an emission in the deep blue region, and the copolymers showedimproved hole injecting/transporting characteristics.