Lighting up ultrathin films

Light micrograph showing two-dimensional crystals of the thin-film semiconductor
Light micrograph showing two-dimensional crystals of the thin-film semiconductor molybdenum sulfide. Picture: Hisato Yamaguchi (Los Alamos National Laboratory, USA)

Based on a study of the optical properties of novel ultrathin semiconductors, LMU researchers have developed a method for rapid and efficient characterization of these materials.

Chemical compounds based on elements that belong to the so-called transition metals can be processed to yield atomically thin two-dimensional crystals consisting of a monolayer of the composite in question. The resulting materials are semiconductors with surprising optical properties. In cooperation with American colleagues, a team of LMU physicists led by Alexander Högele has now explored the properties of thin-film semiconductors made up of transition metal dichalcogenides (TMDs). ...

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