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Synthesis and Electroluminescent Properties of Disubstituted Polyacetylene Derivatives Containing Multi-Fluorophenyl and Cyclohexylphenyl Side Groups

✍ Scribed by Sheng-Hsiung Yang; Chun-Hao Huang; Chiu-Hsiang Chen; Chain-Shu Hsu

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
615 KB
Volume
210
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

A new series of disubstituted polyacetylene derivatives that contain multi‐fluorine atoms on the pendent phenyl ring have been synthesized and characterized. The results reveal a greater red‐shift in UV‐vis absorption and PL emission upon incorporating more fluorine atoms on the pendent phenyl ring. Among them, disubstituted polyacetylene with a difluorophenyl group (PDPA‐2F) showed the highest luminescent efficiency. The device performance can be promoted by blending a hole‐transporting material TM‐TPD into PDPA‐2F as the active layer or by using a light‐emitting copolymer in which PDPA‐2F was copolymerized with a carbazole group (PDPA‐2Fcab). A light‐emitting diode of ITO/PEDOT/PDPA‐2Fcab/Ca/Al revealed a maximum luminescence of 4230 cd · m^−2^ at 14 V and a maximum current efficiency of 3.37 cd · A^−1^ at 7 V.

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