Seminar by Prof. Sameer Sapra, Department of Chemistry, IIT Delhi on "Transition Metal Dichalcogenide based hybrid nanoheterostructures for optoelectronic applications"
31 Oct 2019
Seminar room # 350
Talk Title : "Transition Metal Dichalcogenide based hybrid nanoheterostructures for optoelectronic applications"
Abstract
Transition metal dichalcogenide (TMD) nanosheets with defect-rich and vertically aligned edges are highly advantageous for various catalytic applications. Synthesis of TMDs using the colloidal techniques opens various possibilities to tune the electronic and optical properties of these 2D materials. As an example, we choose MoSe2 nanosheets that have plenty of defects. The defect sites are responsible for adsorption on the surface thereby yielding excellent electrocatalytic hydrogen evolution and other catalytic activities on the surface.
Further, these defects can be employed as seeding points to grow other materials on them. Cu2S in these defect sites leads to a Type-II semiconductor heterojunction that allows for charge separation and therefore the MoSe2-Cu2S forms a superior material for generation of photocurrent.