Deposition and characterization of n type Lanthanum doped zinc oxide /p cuprous oxide layers
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Date
2020-02-23
Journal Title
Journal ISSN
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Publisher
University Of Eloued جامعة الوادي
Abstract
In this study, CuO
thin films were deposited by hydrothermal deposition
(chemical bath or aqueous solution) methods onto a pure and La doped ZnO
substrat and followed by a thermal oxidation constant temperatures at 300ºC to
produce an oxide based p n junction. In a pre vious work , the formation and
characterizations of pure and La doped ZnO thin film with different Lanthanum
concentrations (from 1, to 5 wt %) on glass substrates using spray pyrolysis
technique at 375 °C were studied . Our aim is to study and investig ate the effect of
CuCl 2 .2H 2 O concentration as precursor, annealing process, and the process time
during the deposition, while keeping solution temperature at 65ºC , on the
structural, morphological, optical, and electrical properties of the prepared thin
fi lms. Characterization of p n junction thin films by X ray diffraction, Scanning
electron microscopy ,UV Visble ,FTIR Spectroscopy and photoluminescence,
respectively, were performed.
The XRD pattern of Cu
x O/ZnO exhibits five diffraction peaks (the 34.47°
correspond to the (002) direction of ZnO and the others additional two peaks at 2 θ
values of around 35.447° and 38.684° which correspond to the (and (002)/ (111)
planes of pure monoclinic structure of CuO) CuO).No additional peaks related to other
phases such as Cu, Cu(OH)2 or Cu 2 O were detected suggesting that the grown
CuO are of high purity
The photoluminescence signal of the thin films CuO showed a narrow band gap of
(2.1 eV) . The estimated thicknesses of the CuO layer the crystallite sizes were
calculate d 69.8 nm .The SEM image indicates that CuO adhere to ZnO s robustly
and more stable.
Description
Intervention
Keywords
Thin films, XRD Spray pyrolysis, ZnO, La doped Photoluminescence CuO thin films
Citation
ALLAG Nassiba. BENHAOUA Boubaker. SAIED Chahnez. Deposition and characterization of n type Lanthanum doped zinc oxide /p cuprous oxide layers. International PluridisciplinaryPhD Meeting (IPPM’20). 1st Edition, February23-26, 2020. University Of Eloued. [Visited in ../../….]. Available from [copy the link here].