4.7 Article Proceedings Paper

Electrochemical deposition of bulk MoS2 thin films for photovoltaic applications

期刊

SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 186, 期 -, 页码 165-174

出版社

ELSEVIER
DOI: 10.1016/j.solmat.2018.06.026

关键词

Transition metal dichalcogenides; Molybdenum disulfide (MoS2); Electrodeposition; Cyclic voltammetry; Atomic Force Microscopy; Mott-Schottky analyses; Photovoltaics

资金

  1. Qatar National Research Fund under a Qatar National Priority Project [NPRP-6-931-2-382]

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Layered transition metal dichalcogenides (TMDs) materials have shown high potential in many optoelectronic and photovoltaic applications due to their intriguing semiconducting properties. Most noticeably, the layered molybdenum disulfide (MoS2) has drawn much attention because of its unique layer-dependent band gap tun ability and high electron mobility. A facile non-vacuum electrodeposition approach is used to deposit bulk MoS2 films onto FTO substrate immersed in an aqueous precursor solution of molybdenum and sulfur. The as-deposited and post-treated films are studied using X-ray diffraction, electron microscopy equipped with energy dispersive x-ray spectroscopy, light absorption measurement, and X-ray photoelectron spectroscopy. Although the obtained gap energy values, 1.3-1.4 eV, of bulk MoS2 are indirect, the measured light absorption characteristic is high, especially above 1.7 eV. Also, electrochemical impedance spectroscopy studies of the films show that carrier concentration in higher than 10(15) cm(-3).

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