Light-Emitting Triangles for Applications in Optical Technology

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DMR-0820404: H. R. Gutierrez, N. Perea-Lopez, A.-L. Elias, A. Berkdemir, B. Wang, Ruitao Lv, F. Lopez-Urias, V. H. Crespi, H. Terrones and M. Terrones. Extraordinary Room-Temperature Photoluminescence in Triangular WS2 Monolayers. Nanoletters, (2013)

For the first time, MRSEC researchers have created single layers of a naturally occurring rare mineral called tungstenite or WS2. The resulting sheets of stacked sulfur and tungsten atoms forms honeycomb patterns within triangular islands that have unusual light-emitting (photoluminescent) properties. These triangular structures could have many potential applications in optical light detection, light-emitting diodes, and lasers. MRSEC researchers plan to use this chemical-vapor-deposition technology to grow innovative monolayers from other layered materials, such as molybdenum diselenide (MoSe2), niobium diselenide (NbS2), tungsten diselenide (WSe2), and others.

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