期刊
OPTICS EXPRESS
卷 21, 期 20, 页码 23416-23424出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.21.023416
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- National Science Council of Taiwan [NSC99-2112-M-002-008-MY3, NSC100-2112-M-001-028-MY3]
We demonstrate stable and tunable light emission in ultraviolet to near infrared regime by using annealed SiOx sample. By adjusting the ratio of Si and O of SiOx, different wavelengths such as ultraviolet, visible and near infrared photoluminescence can be tuned. From the results of transmission electron microscope, various sizes (1 similar to 4 nm) of the embedded Si nanoparticles were formed. Nanoparticles with smaller sizes were indeed formed for UV-blue emitting samples and the origin of light emission may be misattributed to the quantum confinement effects. However, we found the efficient and stable light emission in UV-blue regime, with lifetime on the order of nanoseconds, is dominantly from the defects. (C) 2013 Optical Society of America
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