Ultraviolet photoluminescence of ZnO quantum dots sputtered at room-temperature.
We observe ultraviolet photoluminescence from sputtered ZnO quantum dots which are fabricated with no annealing steps. The nanocrystals are embedded in amorphous SiO2 and exhibit a narrow size distribution of 3.5 ± 0.6 nm. Photoluminescence and transmittance measurements show a shift of ultraviolet emission and absorption of the dots compared to bulk ZnO material. This work paves the way for cheap nanooptical devices in the ultraviolet which are fabricated in a single sputtering run.
Department of Physics, University of Konstanz, Konstanz, Germany.
Gillian
G
Kiliani
Reinhard
R
Schneider
Dimitri
D
Litvinov
Dagmar
D
Gerthsen
Mikhail
M
Fonin
Ulrich
U
Rüdiger
Alfred
A
Leitenstorfer
Rudolf
R
Bratschitsch
D004867:Equipment Design; D019544:Equipment Failure Analysis; D008163:Luminescent Measurements / Q000295:instrumentation*; D036103:Nanotechnology / Q000295:instrumentation*; D045663:Quantum Dots; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry*
D015034:Zinc Oxide