Synthesis and Blue Electroluminescent Properties of Copolymers Derived from Silafluorene and Thiophene

Chem. J. Chinese Universities

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Synthesis and Blue Electroluminescent Properties of Copolymers Derived from Silafluorene and Thiophene

JIANG Xi, TIAN Ren-Yu, MO Yue-Qi*, CAO Yong

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

Received:2007-01-24 Revised:1900-01-01 Online:2007-08-10 Published:2007-08-10
Contact: MO Yue-Qi

Abstract

Abstract: Two series of silafluorene based copolymers containing a small molar fraction(1%—3%) of thiophene derivatives moieties were synthesized with Yamamoto coupling reaction: poly{9,9-dihexyl-3,6-silafluorene-co-[2,5-di(phenylene-4-yl)-thiophene]}(PSiF-DPT) and poly{9,9-dihexyl-3,6-silafluorene-co-[2,5-di-((2-methylphenylene)-4-yl)-thiophene]}(PSiF-DMPT). These copolymers were characterized via UV-Vis absorption spectra and photoluminescence spectra. Polymer light-emitting diodes(PLED) were fabricated to investigate these electroluminescent properties. It was found that the thiophene derivatives moieties became the efficient blue emitter via efficient energy transfer from the polysilafluorene segments. With the decrease of the coplanarity of thiophene derivatives or its feed ratio, the PL and EL spectra can be blue shifted. The color purity can be adjusted to CIE(0.19,0.16) with a EL quantum efficiency of 0.46%.

Key words: Polymer light-emitting diode, Polysilafluorene, Thiophene, Blue light-emitting polymer, Electroluminescence

CLC Number:

O631

TrendMD:

JIANG Xi, TIAN Ren-Yu, MO Yue-Qi*, CAO Yong. Synthesis and Blue Electroluminescent Properties of Copolymers Derived from Silafluorene and Thiophene[J]. Chem. J. Chinese Universities, doi: .

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Synthesis and Blue Electroluminescent Properties of Copolymers Derived from Silafluorene and Thiophene

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