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Toward RGB LEDs based on rare earth-doped ZnO
- Source :
- Dipòsit Digital de la UB, Universidad de Barcelona
- Publication Year :
- 2020
- Publisher :
- Institute of Physics (IOP), 2020.
-
Abstract
- By using ZnO thin films doped with Ce, Tb or Eu, deposited via radiofrequency magnetron sputtering, we have developed monochromatic (blue, green and red, respectively) light emitting devices (LEDs). The rare earth ions introduced with doping rates lower than 2% exhibit narrow and intense emission peaks due to electronic transitions in relaxation processes induced after electrical excitation. This study proves zinc oxide to be a good host for these elements, its high conductivity and optical transparency in the visible range being as well exploited as top transparent electrode. After structural characterization of the different doped layers, a device structure with intense electroluminescence is presented, modeled, and electrically and optically characterized. The different emission spectra obtained are compared in a chromatic diagram, providing a reference for future works with similar devices. The results hereby presented demonstrate three operating monochromatic LEDs, as well as a combination of the three species into another one, with a simply-designed structure compatible with current Si technology and demonstrating an integrated red-green-blue emission.
- Subjects :
- Materials science
Bioengineering
Òxid de zinc
02 engineering and technology
Electroluminescence
010402 general chemistry
01 natural sciences
law.invention
Condensed Matter::Materials Science
law
Zinc oxide
General Materials Science
Emission spectrum
Electrical and Electronic Engineering
Thin film
Díodes electroluminescents
business.industry
Mechanical Engineering
Doping
General Chemistry
Sputter deposition
021001 nanoscience & nanotechnology
Light emitting diodes
0104 chemical sciences
Mechanics of Materials
Electrode
Optoelectronics
Monochromatic color
0210 nano-technology
business
Light-emitting diode
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Dipòsit Digital de la UB, Universidad de Barcelona
- Accession number :
- edsair.doi.dedup.....78c020dafb052b2a26b3ed2f52ceaef0