ZnS:Cu polymer nanocomposites for thin film electroluminescent devices.
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/Al) 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.
Department of Inorganic Chemistry, Dresden University of Technology, Mommsenstr. 6, 0-01062 Dresden, Germany.
Christian
C
Schrage
Holger
H
Althues
Andrea
A
Klausch
Dieter
D
Adam
Stefan
S
Kaskel