Bright Blue Photo- and Electroluminescence from Eu2+-Doped GaN/SiO2 Nanocomposites

Authors

Errata

This article is corrected by:

  1. Errata: Bright Blue Photo- and Electroluminescence from Eu2+-Doped GaN/SiO2 Nanocomposites Volume 18, Issue 1, 9, Article first published online: 4 January 2008

  • We are grateful for the financial support received for this work from NSERC (Natural Sciences and Engineering Research Council of Canada) through the AGENO (Accelerator Grant for Exceptional New Opportunities) project, Canada Foundation for Innovation (CFI), and the British Columbia Knowledge Development Fund (BCKDF) of Canada. Supporting Information is available online from Wiley InterScience or from the authors.

Abstract

In this article we demonstrate the synthesis of Eu2+-doped GaN/SiO2 nanocomposites using a simple solid state reaction and their use in light-emitting devices. The nanocomposite exhibits a bright blue luminescence when excited in the UV region (quantum yield = 23 %). The origin of the blue emission is attributed to the presence of europium ions in the +2 oxidation state in the GaN/SiO2 nanocomposites. Analysis of the EPR spectrum of europium-doped GaN/SiO2 nanocomposites confirms the existence of Eu2+ in the nanocomposites. Various control experiments show that the blue emission arises from these europium ions and that the interface of GaN and silica plays a crucial role. The Eu2+-doped GaN/SiO2 nanocomposite also exhibits a bright blue electroluminescence. Furthermore, the nanocomposites can be coated with a polymer to tune their dispersibility in organic medium.

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