Issue 12, 2012

Electrodeposition of luminescent composite metal coatings containing rare-earth phosphor particles

Abstract

Mixtures of acetamide and dimethylsulfone (DMSO2) with dissolved anhydrous transition metal chlorides are introduced as new non-aqueous electrolytes for the preparation of composite metal coatings with embedded hydrophilic particles via an electrolytic co-deposition process. Red-emitting (Eu2O3 and Y2O3:Eu3+), yellow-emitting (Y3Al5O12:Ce3+), green-emitting (Gd2O2S:Tb3+) and blue-emitting (BaMg2Al16O27:Eu2+) rare-earth phosphor particles and yttrium oxide particles have been embedded into thin nickel and cobalt layers. The metal coatings with the rare-earth phosphor particles have a metallic lustre, but show at the same time photoluminescence upon irradiation with UV light. The spectroscopic and photophysical properties of the rare-earth phosphors are not modified by embedding them in the metallic host matrix. Different electrodeposition parameters were optimised in order to obtain well-adherent coatings with a uniform particle distribution. By preparing mixtures of the Y2O3:Eu3+ and Gd2O2S:Tb3+ phosphors, the emission colour could be varied from red to orange and yellow to green, depending on the mixing ratios. Embedding mixtures of yellow and blue phosphors in the metal layer made it possible to produce coatings with white photoemission.

Graphical abstract: Electrodeposition of luminescent composite metal coatings containing rare-earth phosphor particles

Supplementary files

Article information

Article type
Paper
Submitted
12 Aug 2011
Accepted
06 Jan 2012
First published
08 Feb 2012

J. Mater. Chem., 2012,22, 5514-5522

Electrodeposition of luminescent composite metal coatings containing rare-earth phosphor particles

M. Ganapathi, S. V. Eliseeva, N. R. Brooks, D. Soccol, J. Fransaer and K. Binnemans, J. Mater. Chem., 2012, 22, 5514 DOI: 10.1039/C2JM13925A

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