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Development and characterization of adjustable refractive index scattering epoxy acrylate polymer layers

Eiselt, Thomas; Preinfalk, Jan; Gleißner, Uwe; Lemmer, Uli; Hanemann, Thomas

Abstract (englisch):
Several polymer films for improved optical properties in optoelectronic devices are presented. In such optical applications, it is sometimes important to have a film with an adjusted refractive index, scattering properties, and a low surface roughness. These diffusing films can be used to increase the efficiency of optoelectronic components, such as organic light-emitting diodes. Three different epoxy acrylate mixtures containing Syntholux 291 EA, bisphenol A glycerolate dimethacrylate, and Sartomer SR 348 L are characterized and optimized with different additives. The adjustable refractive index of the material is achieved by chemical doping using 9-vinylcarbazole.Titanium nanoparticles in the mixtures generate light scattering and increase the refractive index additionally. A high-power stirrer is used to mix and disperse all chemical ubstances together to a homogenousmixture. The viscosity behavior of the mixtures is an important property for the selection of the production method and, therefore, the viscosity measurement results are presented. After the mixing, the monomer mixture is applied on glass substrates by screen printin ... mehr

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Institut für Mikrostrukturtechnik (IMT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.1117/1.OE.56.3.037105
ISSN: 0036-1860, 0091-3286, 1560-2303
URN: urn:nbn:de:swb:90-679232
KITopen ID: 1000067923
HGF-Programm 43.22.03; LK 01
Erschienen in Optical engineering
Band 56
Heft 3
Seiten 037105-1 - 37105-5
Schlagworte epoxy acrylate polymer; refractive index; viscosity; roughness; organic light-emitting diodes
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