Synthesis of Monomer and Conjugate Polymer Based on Carbazole and the Application of PLED
Date Issued
2006
Date
2006
Author(s)
Lin, Yi-Jing
DOI
zh-TW
Abstract
In this thesis, Suzuki coupling was used to synthesize biphenyl with carbazole group. The same method was also used to synthesize conjugated polymers P1~P5 with the other monomer. Those polymers we synthesized are almost with good thermal stability (Td= 360~480℃). From optical and electrochemical analyses, we find the properties of polymers were influenced by differential main-chain and we could calculate the HOMO & LUMO of polymers.
The oxidative dimerization of carbazole group in the side-chain makes all polymers be able to electropolymerize. The HOMO level of the film of these polymers was about -5.2eV due to the dimerization of carbazole group which is close the femi-level of ITO. Therefore we application the electropolymerized film to Organic Light Emitting Diode device. Different amount of oxidative-reductive cycle and different materials of emitting layer made OLED devices with different performances. We find that the OLED devices consisted of the films of P1 and P3 formed by electopolymerization with better brightness and efficiency than standard device (using PEDOT/PSS as hole injection layer). The electopolymeriazed films of other polymers lower turn-on voltage of device.
Subjects
咔
唑
carbazole
Type
thesis
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