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ZnS:Cu polymer nanocomposites for thin film electroluminescent devices

: Schrage, C.; Althues, H.; Klausch, A.; Adam, D.; Kaskel, S.


Journal of nanoscience and nanotechnology 10 (2010), No.7, pp.4335-4340
ISSN: 1533-4880
Journal Article
Fraunhofer IWS ()
Nanoverbundwerkstoff; Zinksulfid; Kupferzusatz; Kofällung; Elektrolumineszenz; Polymethylmethacrylat (PMMA); Polyvinylcarbazol; Polymermatrix-Verbundwerkstoff; Photolumineszenzspektrum; Gleichstrom

Copper-doped zinc sulphide nanoparticles with varying copper content were synthesized via a coprecepitation method and embedded in polymer thin films by phase transfer technique to examine direct current electroluminescence (DC-EL) properties. A single layer structure (ITO/ZnS:Cu@ polymer/AI) was chosen to examine the influence of film thickness, copper content and polymeric matrix. Two types of devices were investigated based either on an insulating polymethylmethacrylate (PMMA) matrix or a semiconducting poly(9-vinylcarbazole) (PVK) matrix. The resulting DC-EL differs in spectral characteristics showing a broad EL emission over the whole visible range for PMMA based devices and EL with narrow full width at half-maxima values (FWHM) and maxima positions close to those observed in photoluminescence (PL) spectra of particle dispersions.