A triazole containing co-polymer for use as an electron transport material in multilayer LEDs

Alan W. Grice, Ali R. Tajbakhsh, Paul L. Burn, Donal D.C. Bradley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We report investigations into a poly(1,20-(10,13-didecyl)distyrylbenzene-co-1,2-[4-(p-ethylphenyl)]triazole) (TRIDSB) electron transport material and its incorporation into single and multilayer LEDs. Multilayer devices have been investigated with poly(p-phenylenevinylene) (PPV) and poly(2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene) as hole transport layers (HTLs). The incorporation of the polymer into an ITO/PPV/TRIDSB/Al LED facilitates electron injection into the hole transporting emissive layer and results in a ten fold increase in the external quantum efficiency for electroluminescence (EL) of the PPV layer from 0.008% to 0.08-0.1%. In an ITO/I-MEHPPV/TRIDSB/Al device the corresponding increase in the quantum efficiency for EL from the I-MEHPPV is fifty fold, from 0.002% to between 0.06-0.11%. The polymer has been shown to be thermally stable with no glass transition temperature or melting point detected within the range 25-250°C.
Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
DOIs
StatePublished - Dec 1 1997
Externally publishedYes

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