Electrodeposition and characterisation of ZnTe layers for application in CdTe based multi-layer graded bandgap solar cells

DISO, D G, FAUZI, F, ECHENDU, O K, WEERASINGHE, A R and DHARMADASA, I M (2011). Electrodeposition and characterisation of ZnTe layers for application in CdTe based multi-layer graded bandgap solar cells. Journal of Physics: Conference Series, 286, 012040.

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Link to published version:: 10.1088/1742-6596/286/1/012040

Abstract

Zinc Telluride (ZnTe) thin films have been deposited on glass/conducting glass substrates using low-cost aqueous electrodeposition (ED) method. The structural, optical and morphological properties of the resulting films have been characterized using X-ray diffraction (XRD), spectrophotometry and Scanning Electron Microscopy (SEM). It has been confirmed by XRD technique that the deposited layers are nano- and polycrystalline mixture for as deposited layers. Photoelectrochemical (PEC) studies revealed that the layers are p-type in electrical conduction. Optical absorption measurement has been used for the bandgap determination of the deposited layers. The bandgap of the polycrystalline ZnTe layers are in the range (2.65 – 2.75) eV for the ZnSO4 precursor, and (2.70 – 2.87) eV for the ZnCl2 precursor instead of (2.21 – 2.26) eV reported for crystalline ZnTe. This increase may be due to the quantum effect which confirmed by the absence of strong XRD peaks from these layers and/or inclusion of ZnO in the deposited layers.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Electronic Materials and Sensors Research Group
Identification Number: 10.1088/1742-6596/286/1/012040
Depositing User: Helen Garner
Date Deposited: 19 Dec 2011 12:14
Last Modified: 19 Dec 2011 12:14
URI: http://shura.shu.ac.uk/id/eprint/4208

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