(TheHindu) Researchers from IIT Madras have found a way of enhancing the opto-electronic properties tungsten diselenide (WSe2) and molybdenum diselenide. A key property of these materials is photoluminescence, in which the material absorbs light and re-emits it as a spectrum property about 30 times in tungsten diselenide, by drop-casting gold nanoparticles on to a two-dimensional film.
Consisting of practically one layer of atoms, these materials are two-dimensional in structure. Photoluminescence properties can be used in various devices such as quantum LEDs which can be used in communication and computation.
β€œThe most challenging aspect of this study was the controlled photoluminescence measurement of these materials from room temperature to 100 K,” says Pramoda Kumar Nayak, a DST Ramanujan Fellow at the Department of Physics of IIT Madras.

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