Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 210, Issue 1, Pages 37-47Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.200800467
Keywords
conjugated polymers; light-emitting diodes; metathesis; polyacetylenes
Categories
Funding
- National Science Council of the Republic of China [NSC 95-2221-E-009-161-MY3]
- Ministry of Education (MOE)
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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 F 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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