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Proceedings Paper

Toward blue emission in ZnO based LED
Author(s): Bruno Viana; Thierry Pauporté; Oleg Lupan; Tangui Le Bahers; Ilaria Ciofini
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Paper Abstract

The bandgap engineering of ZnO nanowires by doping is of great importance for tunable light emitting diode (LED) applications. We present a combined experimental and computational study of ZnO doping with Cd or Cu atoms in the nanomaterial. Zn1-xTMxO (TM=Cu, Cd) nanowires have been epitaxially grown on magnesium-doped p-GaN by electrochemical deposition. The Zn1-xTMxO/p-GaN heterojunction was integrated in a LED structure. Nanowires act as the light emitters and waveguides. At room temperature, TM-doped ZnO based LEDs exhibit low-threshold emission voltage and electroluminescence emission shifted from ultraviolet to violet-blue spectral region compared to pure ZnO LEDs. The emission wavelength can be tuned by changing the transition metal (TM) content in the ZnO nanomaterial and the shift is discussed, including insights from DFT computational investigations.

Paper Details

Date Published: 6 February 2012
PDF: 8 pages
Proc. SPIE 8278, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVI, 82780N (6 February 2012); doi: 10.1117/12.909871
Show Author Affiliations
Bruno Viana, LCMCP, Ecole Nationale Supérieure de Chimie de Paris (France)
Thierry Pauporté, LECIME, Ecole Nationale Supérieure de Chimie de Paris (France)
Oleg Lupan, LECIME, Ecole Nationale Supérieure de Chimie de Paris (France)
Tangui Le Bahers, LECIME, Ecole Nationale Supérieure de Chimie de Paris (France)
Ilaria Ciofini, LECIME, Ecole Nationale Supérieure de Chimie de Paris (France)


Published in SPIE Proceedings Vol. 8278:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVI
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Norbert Linder, Editor(s)

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