Synthesis and Properties of Copolymers Based on Dialkylfluorene and 3,6-Fluorene Substituted by Triphenylamine Units

Chem. J. Chinese Universities

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Synthesis and Properties of Copolymers Based on Dialkylfluorene and 3,6-Fluorene Substituted by Triphenylamine Units

WU Zhong-Lian, WANG Lei, LIU Jin-Cheng, YING Lei, YANG Wei, CAO Yong*

Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Specical Functional Materials of Ministry of Education, South China University of Technology, Guangzhou 510640, China

Received:2007-12-06 Revised:1900-01-01 Online:2008-04-10 Published:2008-04-10
Contact: CAO Yong

Abstract

Abstract: A series of conjugated copolymers derived from 9,9-dioctyl-2,7-fluorene(DOF) and 9,9-bis(4-diphenylaminophenyl)-3,6-fluorene(36FT) were prepared by Suzuki coupling polymerization, which have a high molecular weights(M_n=47000—189000). The resulting copolymers are readily soluble in common organic solvents such as THF, CHCl3 and toluene etc.. The electrochemical, optical and electroluminescent properties were investigated. Cyclic voltammogram(CV) indicates that the HOMO level of the copolymers is higher than that of the PF homopolymer, and it increases with the increase in 36FT mass fraction from 2% to 35%. The blue polymer light-emitting diodes(PLEDs) with the device configuration of ITO/PEDOT/PVK/polymer/Ba/Al were prepared. The highest external quantum efficiency was 0.52% from the device with 36PFT10 as the active layer.

Key words: Electroluminescence, Poly(fluorene) derivatives, Polymer light-emitting diodes(PLEDs)

CLC Number:

O632

TrendMD:

WU Zhong-Lian, WANG Lei, LIU Jin-Cheng, YING Lei, YANG Wei, CAO Yong*. Synthesis and Properties of Copolymers Based on Dialkylfluorene and 3,6-Fluorene Substituted by Triphenylamine Units[J]. Chem. J. Chinese Universities, doi: .

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Synthesis and Properties of Copolymers Based on Dialkylfluorene and 3,6-Fluorene Substituted by Triphenylamine Units

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