科研之友
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摘要
Zinc oxide films with different microstructures have been produced using pulsed-laser deposition. Photoluminescence efficiency and angular emission patterns are characterized and reported in absolute radiometric units. Efficiencies between 0.6x10(-6) and 7x10(-6) were observed. In most cases, the angular emission pattern was lambertian, though the film microstructure produced an isotropic emission pattern in one case. A secondary peak, red-shifted 180 meV from the main ultraviolet ZnO emission peak, was observed for some films. The origin of the 180-meV red shift is tentatively attributed to zinc vacancies.
- 出版日期2008-1
