Photoelectrical and Gas-sensing Properties of Nanostructured ZnO/CuO Samples

Authors	A. Ogurcovs¹, Vj. Gerbreders¹, E. Tamanis¹, E. Sledevskis¹, A. Gerbreders²
Affiliations	¹ Institute of Life Sciences and Technologies, Daugavpils University, P.O.5401 Daugavpils, Latvia ² Institute of Solid State Physics, University of Latvia, P.O.1063 Riga, Latvia
Е-mail	andrejs.ogurcovs@gmail.com
Issue	Volume 8, Year 2016, Number 4
Dates	Received 18 October 2016; revised manuscript received 19 December 2016; published online 23 December 2016
Citation	A. Ogurcovs, Vj. Gerbreders, E. Tamanis, et al., J. Nano- Electron. Phys. 8 No 4(2), 04078 (2016)
DOI	10.21272/jnep.8(4(2)).04078
PACS Number(s)	81.07.Bc, 79.60.Jv.
Keywords	ZnO/CuO nanocomposite, Gas sensor (5) , p-n junction (2) , Photovoltaics (4) , Hydrothermal synthesis (3) .
Annotation	An experimental p-n junction device was fabricated by synthesizing ZnO/CuO nanostructures via a hydrothermal process. The structural and optical properties of the ZnO/CuO nanocomposite were studied by X-ray diffraction (XRD), scanning electron microscope (SEM) and photovoltaic measurements. The XRD results showed the formation of the ZnO/CuO nanostructures (hexagonal wurtzite/monoclinic tenorite). The SEM images showed that the ZnO layer consists of vertically oriented nanorods and a CuO layer of nanosheets ranging in size from 1 to 1.5 um.The photovoltaic measurements indicated a certain level of photo-EMF. Vacuum tests revealed peculiar sensitivity to the atmospheric moisture of the ZnO/CuO samples.
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