Electrodeposited MoTe2 Thin Films for Photoelectrochemical (PEC) Cell Applications

T. Joseph, Sahaya Anand and Mei Ying, Lim and Mazalan, Nor Hamizah (2011) Electrodeposited MoTe2 Thin Films for Photoelectrochemical (PEC) Cell Applications. In: Malaysian Technical Universities International Conference on Engineering & Technology (MUiCET 2011), 13-15 November 2011, UTHM, Batu Pahat, Johor.

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Abstract

Thin films of transition metal chalcogenides, molybdenum ditelluride (MoTe2) have been electrodeposited cathodically on both indium tin oxide-coated conducting glass substrates and stainless steel substrates from H2MoO4 and TeO2 solutions. These MoTe2 thin films are useful as photovoltaic cell and photoelectrochemical (PEC) solar cell. The electrode potential was set to -0.9 V while the bath temperature was maintained at 40±1 ºC with varies deposition time. X-ray diffraction analysis showed the presence of highly textured MoTe2 films with polycrystalline nature. Compositional analysis by EDX gives their stoichiometric relationships. Scanning electron microscope (SEM) was used to study surface morphology and shows that the films are continuous, uniform and useful for device fabrication. The optical absorption spectra showed that the material has an indirect band-gap value of 1.92-2.03 eV with different deposition time. The film also exhibited p-type semiconductor behavior.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Electrodeposition; Molybdenum ditelluride; Solar cell; indirect band gap; Thin films
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Manufacturing Engineering > Department of Engineering Materials
Depositing User: Dr. T. Joseph Sahaya Anand
Date Deposited: 17 Jul 2012 12:39
Last Modified: 28 May 2015 02:41
URI: http://eprints.utem.edu.my/id/eprint/4344
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