Oxide nanostructures for energy efficient white lighting

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Presentation transcript:

Oxide nanostructures for energy efficient white lighting Principal Investigator: Irina Buyanova Team members : Jan Eric Stehr, Shula Chen and Weimin Chen Aims To perform basic and material-related studies of novel functional nanostructures based on wide bandgap ZnO that are relevant to their applications as energy-saving light emitters, including white lighting To resolve key material-related issues that currently limit device applications To single out the most promising structural design of high-performance light emitters with a high efficiency and low costs P43522

Oxide nanostructures for energy efficient white lighting Structural characterization (XRD, SEM, TEM) Optical characterization (PL, transient-PL, magneto-PL, CL, Raman) Magnetic Resonance (EPR, photo-EPR, ODMR) Processing: ion implantation, electron irradiation, annealing Techniques P43522

Oxide nanostructures for energy efficient white lighting Results: example Reproducible and controlled doping of ZnO nanowires with nitrogen by ion implantation Identification of nitrogen related defects in ZnO nanowires by optical and magnetic resonance spectroscopy Defect optimization for white light emission by thermal annealing P43522