Title

Uv-Blue And Green Electroluminescence From Cu-Doped Zno Nanorod Emitters Hydrothermally Synthesized On P-Gan

Keywords

Cu-ZnO nanorods; Epitaxy; Green emission; Hydrothermal; Photoluminescence; UV-light emitting diode; ZnO; ZnO/p-GaN heterojunction

Abstract

Aqueous solution synthesis of ZnO nanorods on p-GaN(0001) is a low-temperature (< 100 °C) and cost-efficient growth technique of high quality emitters for LED applications. We present morphological, optical and structural properties of zinc oxide nanorod arrays grown by a hydrothermal seed layer-free and rapid synthesis (15 min) on p-GaN(0001). We found that the epitaxial layer possesses a close packed hexagonal nanorod morphology and lateral facets are oriented in the same direction for the various nanorods. The effect of Cu-doping on the optical and electroluminescence properties of Cu-ZnO nanorod arrays on GaN substrate is discussed in details. The UV/Blue and green (near-white) emissions were found in both photoluminescence and electroluminescence spectra indicating the possibility to use the synthesized Cu-ZnO/p-GaN hetero-structures in white LED applications. The emissions started at relatively low forward voltage of 4.9 V and the intensity of the emission increased with increasing the biasing voltage. We propose for further exploration an efficient, seed layer-free and low temperature hydrothermal synthesis technique to fabricate Cu-doped ZnO/p-GaN heterojunction light-emitting devices-LEDs. Copyright © 2012 American Scientific Publishers All rights reserved.

Publication Date

12-1-2012

Publication Title

Journal of Nanoelectronics and Optoelectronics

Volume

7

Issue

7

Number of Pages

712-718

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1166/jno.2012.1413

Socpus ID

84877287320 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84877287320

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