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DS: Fachverband Dünne Schichten

DS 22: Thin Film Applications

DS 22.4: Vortrag

Donnerstag, 4. April 2019, 10:15–10:30, H39

Novel deposition approach of MoS2 thin films for hydrogen evaluation reaction — •Talha Nisar, Torsten Balster, Francis Oliver Vinay Gomes, and Veit Wagner — Jacobs University Bremen gGmb, Campus Ring 1, 28759, Bremen

Electrolytic hydrogen evolution reaction is a promising way to store solar energy. It requires suitable materials as a catalyst to lower over-potential and minimize energy consumption. MoS2 has been demonstrated to be a very promising candidate for hydrogen evolution reaction. In this work, MoS2 films are deposited by spin coating using a Molybdenum (V) chloride precursor solution on Au and ITO substrates. The thickness of the deposited films is linearly dependent on the concentration of precursor. After spin-coating the thin layers are converted to MoS2 by post annealing at temperature above 450C with an additional sulfur source. The thickness of the films ranges from 2nm to 50nm. Raman measurements show E2g and A1g modes of MoS2. The modes have reduced FWHM for higher annealing temperatures, confirming the formation of high quality crystals. This interpretation is supported by XPS, UV-Vis, AFM and XRD measurements. Finally hydrogen evolution activity is determined in dependence of the thickness.

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DPG-Physik > DPG-Verhandlungen > 2019 > Regensburg