Significant progress has been achieved in controlling the size, morphology, and crystal structure of metal oxide nanocrystals, but insight into modulation of electronic structure through dopant incorporation remains underexplored. The first thrust of research considers the anion doping of vanadium(IV) dioxide nanowires with sulfur in order to control the transition temperature of the structural phase transition between the monoclinic (infrared transparent) and tetragonal (infrared reflective) phases for use in stimuli-responsive coatings. The second research thrust entails doping of lanthanum oxychloride (LaOCl) with luminescent Ln3+ ions in order to create photoluminescent nanomaterials for deployment within phosphors. It is shown that doping Tb3+ and Eu3+ ions into LaOCl yields nanocrystals that luminesce in the green and red regions, respectively, of the electromagnetic spectrum upon ultraviolet excitation. The ability to modify electronic structure allows for unprecedented opportunities for tuning phase stabilities and thus functional properties of complex oxides and oxyhalides.

Doping complex oxides: Consequences for electronic structure

251st National Meeting (2016)

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