4 March 2015 Synthesis of Sb-doped ZnO microspheres by pulsed laser ablation and their photoluminescence properties
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Abstract
We succeeded in synthesizing antimony (Sb)-doped ZnO microspheres by ablating a ZnO sintered target containing 5 wt% of Sb with a Nd:YAG laser at a fluence of 25 J/cm2 in air. The well-spherical ZnO microcrystals with diameters of 1-20 μm were collected on a substrate which was put near the ablation spot. Most of the ZnO microspheres have a crystalline structure. In addition, Raman peak of the Sb-doped ZnO microspheres was shifted toward lower frequency side, indicating substitutional Sb3+ at Zn antisite. Room-temperature photoluminescence properties of the microsphere were investigated under 325 nm He-Cd laser or 355 nm Nd:YAG laser excitation. An ultraviolet (UV) emission and lasing in whispering gallery mode were observed from the photoexcited microsphere.
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T. Tanaka, T. Tanaka, T. Shimogaki, T. Shimogaki, F. Nagasaki, F. Nagasaki, M. Higashihata, M. Higashihata, D. Nakamura, D. Nakamura, H. Ikenoue, H. Ikenoue, T. Okada, T. Okada, } "Synthesis of Sb-doped ZnO microspheres by pulsed laser ablation and their photoluminescence properties", Proc. SPIE 9350, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XX, 93501L (4 March 2015); doi: 10.1117/12.2180460; https://doi.org/10.1117/12.2180460
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