Comparative study of the ZnO and Zn 1-xCd xO nanorod emitters hydrothermally synthesized and electrodeposited on p-GaN

Lupan Oleg; Pauporte Thierry; Chow Lee; Chai Guangyu; Viana Bruno; Ursaki Veaceslav; Monaico Eduard; Tiginyanu Ion

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889

SM ISO690:2012

LUPAN, Oleg, PAUPORTE, Thierry, CHOW, Lee, CHAI, Guangyu, VIANA, Bruno, URSAKI, Veaceslav, MONAICO, Eduard, TIGINYANU, Ion. Comparative study of the ZnO and Zn 1-xCd xO nanorod emitters hydrothermally synthesized and electrodeposited on p-GaN. In: Applied Surface Science, 2012, vol. 259, pp. 399-405. ISSN 0169-4332. DOI: https://doi.org/10.1016/j.apsusc.2012.07.058

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Applied Surface Science

Volumul 259 / 2012 / ISSN 0169-4332

Comparative study of the ZnO and Zn _1-xCd _xO nanorod emitters hydrothermally synthesized and electrodeposited on p-GaN

DOI:https://doi.org/10.1016/j.apsusc.2012.07.058

Pag. 399-405

Lupan Oleg¹²³, Pauporte Thierry³, Chow Lee¹, Chai Guangyu¹, Viana Bruno⁴, Ursaki Veaceslav⁵, Monaico Eduard²⁵, Tiginyanu Ion⁵

¹ University of Central Florida,
² Technical University of Moldova,
³ Laboratoire d'Electrochimie, Chimie des Interfaces et Modélisation pour l'Energie (LECIME),
⁴ Laboratoire de Chimie de la Matière Condensée de Paris,
⁵ Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu" of the Academy of Sciences of Moldova

Disponibil în IBN: 26 martie 2018

Rezumat

Hydrothermal synthesis and electrodeposition are low-temperature and cost-effective growth techniques of high quality nanostructured active materials for opto-electronic devices. Here we report a hydrothermal seed layer-free and rapid synthesis (15 min) of epitaxial nanorod arrays of ZnO on p-GaN(0 0 0 1). The effects of hydrothermal (HT) versus electrochemical deposition (ECD) synthesis on the optical properties of ZnO nanorods/nanowires on p-GaN substrate are compared in details. For both types of layers, a strong photoluminescent UV-emission was found indicating the high quality of the synthesized ZnO layer. The hetero-structures were used for LED applications. With HT-ZnO and ECD-ZnO, UV-emission started at remarkably low forward voltage of 3.9-4.0 V and 4.4 V respectively and increased rapidly. Moreover, the LED structures showed a stable and repeatable electroluminescence. We propose for further studies a simple, efficient, seed layer-free and low temperature hydrothermal growth technique to fabricate high quality ZnO nanorods/p-GaN heterojunction LED nanodevices. It is also demonstrated that a single short wavelength emission can be shifted to the violet range with Cd-alloying of ZnO used for LED structure.

Cuvinte-cheie
electrochemical deposition, Epitaxy, LED, photoluminescence, ZnO Nanorods

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<dc:creator>Lupan, O.I.</dc:creator>
<dc:creator>Pauporte, T.</dc:creator>
<dc:creator>Chow, L.</dc:creator>
<dc:creator>Chai, G.</dc:creator>
<dc:creator>Viana, B.</dc:creator>
<dc:creator>Ursachi, V.V.</dc:creator>
<dc:creator>Monaico, E.V.</dc:creator>
<dc:creator>Tighineanu, I.M.</dc:creator>
<dc:date>2012-10-15</dc:date>
<dc:description xml:lang='en'><p>Hydrothermal synthesis and electrodeposition are low-temperature and cost-effective growth techniques of high quality nanostructured active materials for opto-electronic devices. Here we report a hydrothermal seed layer-free and rapid synthesis (15 min) of epitaxial nanorod arrays of ZnO on p-GaN(0 0 0 1). The effects of hydrothermal (HT) versus electrochemical deposition (ECD) synthesis on the optical properties of ZnO nanorods/nanowires on p-GaN substrate are compared in details. For both types of layers, a strong photoluminescent UV-emission was found indicating the high quality of the synthesized ZnO layer. The hetero-structures were used for LED applications. With HT-ZnO and ECD-ZnO, UV-emission started at remarkably low forward voltage of 3.9-4.0 V and 4.4 V respectively and increased rapidly. Moreover, the LED structures showed a stable and repeatable electroluminescence. We propose for further studies a simple, efficient, seed layer-free and low temperature hydrothermal growth technique to fabricate high quality ZnO nanorods/p-GaN heterojunction LED nanodevices. It is also demonstrated that a single short wavelength emission can be shifted to the violet range with Cd-alloying of ZnO used for LED structure.</p></dc:description>
<dc:identifier>10.1016/j.apsusc.2012.07.058</dc:identifier>
<dc:source>Applied Surface Science  () 399-405</dc:source>
<dc:subject>electrochemical deposition</dc:subject>
<dc:subject>Epitaxy</dc:subject>
<dc:subject>LED</dc:subject>
<dc:subject>photoluminescence</dc:subject>
<dc:subject>ZnO Nanorods</dc:subject>
<dc:title>Comparative study of the ZnO and Zn 1-xCd xO nanorod emitters hydrothermally synthesized and electrodeposited on p-GaN</dc:title>
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