Laser patterning on transition metal dichalcogenides thin films

Like graphite, transition metal dichalcogenide (TMDC) bulk crystals are formed of monolayers bound to each other by van-der-Waals attraction. TMDC monolayers have a direct band gap, and can be used in electronics as transistors and in optics as emitters and detectors. However, thickness-limited absorption poses a challenge for high efficiency. To overcome this issue, light-trapping techniques such as patterning is suggested.
The possibility of direct writing structures with a laser on insulating substrates in a clean room-free process is attractive for its simplicity, cost effectiveness and wide choice of substrates allowed, including flexible plastic.

This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 840064