| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5399699 | Journal of Luminescence | 2014 | 21 Pages |
Abstract
Electroluminescence (EL) has been obtained and studied in two different wide band gap oxide crystals: MgO:Li (7.8Â eV) and Al2O3:Mg (8.8Â eV). EL requires crystal doping with Li or Mg to induce p-type conductivity and the formation of F-type centers which are the deep levels within the band gap for electron-hole recombination. Oxidizing treatments are required in Al2O3:Mg to reach adequate conductivities. The main EL emissions are at 2.35Â eV (528Â nm) for MgO:Li crystals and at 3.8Â eV (327Â nm) for Al2O3:Mg. Trace impurities also produce EL in the visible region, their control may be used for color designed LEDs.
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Authors
R. RamÃrez-Jiménez, M. TardÃo, J.E. Muñoz-Santiuste, A. de Andrés,