Work on the electronic and transport properties of semiconductor thin films, including how deposition conditions affect carrier mobility, concentration, and uniformity across a film.
A single sputter-deposited ZnO film shows the 'racetrack effect' creates a real spatial gradient in crystallite size, carrier mobility, and gas-sensing response across one nominally uniform substrate.
A sputtered zinc oxide film was expected to be uniform. Its unexpected colors revealed hidden differences in structure, composition, electrical behavior, and gas-sensing performance across a single glass slide.
