Novel UV-transparent 2-component polyurethane resin for chip-on-board LED micro lenses

dc.bibliographicCitation.firstPage2085eng
dc.bibliographicCitation.issue9eng
dc.bibliographicCitation.lastPage2099eng
dc.bibliographicCitation.volume10eng
dc.contributor.authorBauer, Joachim
dc.contributor.authorGutke, Marko
dc.contributor.authorHeinrich, Friedhelm
dc.contributor.authorEdling, Matthias
dc.contributor.authorStoycheva, Vesela
dc.contributor.authorKaltenbach, Alexander
dc.contributor.authorBurkhardt, Martin
dc.contributor.authorGruenefeld, Martin
dc.contributor.authorGamp, Matthias
dc.contributor.authorGerhard, Christoph
dc.contributor.authorSteglich, Patrick
dc.contributor.authorSteffen, Sebastian
dc.contributor.authorHerzog, Michael
dc.contributor.authorDreyer, Christian
dc.contributor.authorSchrader, Sigurd
dc.date.accessioned2021-11-30T05:42:54Z
dc.date.available2021-11-30T05:42:54Z
dc.date.issued2020
dc.description.abstractIn this work we present a novel optical polymer system based on polyurethane elastomer components, which combines excellent UV transparency with high thermal stability, good hardness, high surface tension and long pot life. The material looks very promising for encapsulation and microlensing applications for chip-on-board (CoB) light-emitting diodes (LED). The extinction coefficient k, refractive index n, and bandgap parameters were derived from transmission and reflection measurements in a wavelength range of 200-890 nm. Thermogravimetry and differential scanning calorimetry were used to provide glass transition and degradation temperatures. The surface tension was determined by means of contact angle measurements. As proof of concept, a commercial InGaN-CoB-LED is used to demonstrate the suitability of the new material for the production of microlenses. © 2020 Optical Society of America.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/7558
dc.identifier.urihttps://doi.org/10.34657/6605
dc.language.isoengeng
dc.publisherWashington, DC : OSAeng
dc.relation.doihttps://doi.org/10.1364/OME.393844
dc.relation.essn2159-3930
dc.relation.ispartofseriesOptical Materials Express 10 (2020), Nr. 9eng
dc.rights.licenseOSA Open Access Publishing Agreementeng
dc.rights.urihttps://www.osapublishing.org/library/license_v1.cfmeng
dc.subjectoptical polymer systemeng
dc.subjectpolyurethane elastomer componentseng
dc.subjectthermogravimetryeng
dc.subjectdifferential scanning calorimetryeng
dc.subject.ddc620eng
dc.titleNovel UV-transparent 2-component polyurethane resin for chip-on-board LED micro lenseseng
dc.typearticleeng
dc.typeTexteng
dcterms.bibliographicCitation.journalTitleOptical materials expresseng
tib.accessRightsopenAccesseng
wgl.contributorIHPeng
wgl.subjectIngenieurwissenschafteneng
wgl.typeZeitschriftenartikeleng
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