Multicolor Depth-Resolved Cathodoluminescence from Eu-Doped SiOC Thin Films

A very bright room-temperature cathodoluminescence (CL) signal, tunable in the visible range by changing the Eu2+ concentration, has been observed in Eu-doped SiOC films. Depth-resolved CL measurements demonstrate that a bilayer consisting of two SiOC films containing different Eu concentrations all...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2015-08, Vol.7 (33), p.18201-18205
Main Authors: Bellocchi, Gabriele, Fabbri, Filippo, Miritello, Maria, Iacona, Fabio, Franzò, Giorgia
Format: Article
Language:English
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Summary:A very bright room-temperature cathodoluminescence (CL) signal, tunable in the visible range by changing the Eu2+ concentration, has been observed in Eu-doped SiOC films. Depth-resolved CL measurements demonstrate that a bilayer consisting of two SiOC films containing different Eu concentrations allows the continuous tuning of the Eu2+ emission from blue to green by changing the energy of the exciting electrons. Furthermore, the proper control at the nanoscale of the electron penetration depth allows to obtain a high-quality white light emission. The compatibility of SiOC films with Si technology opens the way to promising applications of Eu-based materials in lighting and display technologies.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.5b05348