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Rare-earth silicates are highly efficient materials for silicon-based light sources. Here we report a novel light-emitting device based on Ce 2 Si 2 O 7 . Intense violet/blue electroluminescence was observed, with a turn-on voltage of about 13 V. The violet/blue emission is attributed to 4f–5d transitions of the Ce 3+  ions in Ce 2 Si 2 O 7 , which are formed by interfacial reaction of CeO 2  and Si. Electroluminescence and photoluminescence mechanisms of the Ce 2 Si 2 O 7  light-emitting device are also discussed.

A novel violet/blue light-emitting device based on Ce2Si2O7