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Titel: Perylene polyphenylmethylsiloxanes for optoelectronic applications
VerfasserIn: Steinbrück, Nils
Kickelbick, Guido
Sprache: Englisch
Titel: Journal of Polymer Science Part B: Polymer Physics
Bandnummer: 57
Heft: 16
Seiten: 1062–1073
Verlag/Plattform: Wiley
Erscheinungsjahr: 2019
Freie Schlagwörter: LED
optoelectronics
perylene
polysiloxane
silicone
DDC-Sachgruppe: 500 Naturwissenschaften
540 Chemie
600 Technik
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: The incorporation of fluorescent organic dyes in an encapsulating matrix represents a route to generate stable and processable materials for optoelectronic devices. Here, we present a method to embed perylene dyes into a high refractive index (HRI) polysiloxane matrix applying an allyl functionalized perylene dye and hydrosilylation chemistry. In a first approach, the dye molecules were covalently integrated into the backbone of linear polyphenylmethylsiloxane chains. The fluorescent and liquid polymers were synthesized with molecular weights from 5660 up to 8400 g mol−1. In a second approach, the dye itself was used as a cross‐linking agent between linear polyphenylmethylsiloxane chains. These preformed fluorescent batch polymers are liquids with dye concentrations between 0.025 and 8 wt %. The applied synthetic methods incorporated the dye covalently into the polymer structure and avoided the crystallization of the dye molecules and thus the formation of excimers, which would reduce the optical emission. The resulting products can be easily incorporated into curable commercially available HRI polyphenylmethylsiloxane resins. The formed materials are ideal LED encapsulants with a solid and flexible consistency, a uniform dispersion of the dyes, and adjustable mechanical properties, realized by changing the amount of perylene polymers. Further properties of the obtained materials are thermal stabilities up to 478 °C, quantum yields larger than 0.97, and high photostabilities. Thus, the covalent integration of dyes into polyphenylsiloxane structures represents a possible route for the stabilization of the organic dyes against the extreme irradiance and thermal conditions in LED applications.
DOI der Erstveröffentlichung: 10.1002/polb.24861
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-332162
hdl:20.500.11880/30563
http://dx.doi.org/10.22028/D291-33216
ISSN: 1099-0488
0887-6266
Datum des Eintrags: 5-Feb-2021
Bezeichnung des in Beziehung stehenden Objekts: Supporting Information
In Beziehung stehendes Objekt: https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fpolb.24861&file=polb14861-sup-0001-Supinfo.pdf
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Chemie
Professur: NT - Prof. Dr. Guido Kickelbick
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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