Print Email Facebook Twitter Device physics of white polymer light-emitting diodes Title Device physics of white polymer light-emitting diodes Author Nicolai, H.T. Hof, A. Blom, P.W.M. Publication year 2012 Abstract The charge transport and recombination in white-emitting polymer light- emitting diodes (PLEDs) are studied. The PLED investigated has a single emissive layer consisting of a copolymer in which a green and red dye are incorporated in a blue backbone. From single-carrier devices the effect of the green- and red-emitting dyes on the hole and electron transport is determined. The red dye acts as a deep electron trap thereby strongly reducing the electron transport. By incorporating trap-assisted recombination for the red emission and bimolecular Langevin recombination for the blue emission, the current and light output of the white PLED can be consistently described. The color shift of single-layer white-emitting PLEDs can be explained by the different voltage dependencies of trap-assisted and bimolecular recombination. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Subject Mechatronics, Mechanics & MaterialsHOL - HolstTS - Technical SciencesHigh Tech Systems & MaterialsElectronicsIndustrial Innovationcharge transportconjugated polymersorganic light-emitting diodesBimolecular recombinationBlue emissionCharge transport and recombinationColor shiftsDeep electron trapsDevice physicsElectron transportLangevin recombinationLight outputRed emissionsSingle carrierSingle emissive layersSingle layerVoltage dependenciesWhite polymer light-emitting diodesCharge transferConjugated polymersElectron transitionsElectron transport propertiesLight emitting diodes To reference this document use: http://resolver.tudelft.nl/uuid:c4672d73-0ceb-4d05-82fa-c1566e95f396 TNO identifier 461308 ISSN 1616-301X Source Advanced Functional Materials, 22 (10), 2040-2047 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.