Blue photoluminescence enhancement in laser-irradiated 6H-SiC at room temperature

Blue photoluminescence (PL) of 6H-SiC irradiated by an ultraviolet laser can be observed at room temperature in dark condition. PL spectra with Gaussian fitting curve of the irradiated SiC show that blue luminescence band (∼440 nm) is more pronounced than other bands. The blue PL enhancement is the...

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Veröffentlicht in:Applied physics letters 2014-01, Vol.104 (4)
Hauptverfasser: Wu, Yan, Ji, Lingfei, Lin, Zhenyuan, Jiang, Yijian, Zhai, Tianrui
Format: Artikel
Sprache:eng
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Zusammenfassung:Blue photoluminescence (PL) of 6H-SiC irradiated by an ultraviolet laser can be observed at room temperature in dark condition. PL spectra with Gaussian fitting curve of the irradiated SiC show that blue luminescence band (∼440 nm) is more pronounced than other bands. The blue PL enhancement is the combined result of the improved shallow N-donor energy level and the unique surface state with Si nanocrystals and graphene/Si composite due to the effect of photon energy input by the short-wavelength laser irradiation. The study can provide a promising route towards the preparation of well-controlled blue photoluminescence material for light-emitting devices.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4863437