YU Wei, XU Huan-qin, XU Yan-mei, WANG Xing-zhan, LU Wan-bing, FU Guang-sheng. Surface Oxidation and Photoluminescence Properties of Silicon Nanoparticle[J]. Chinese Journal of Luminescence, 2011,32(4): 347-352
YU Wei, XU Huan-qin, XU Yan-mei, WANG Xing-zhan, LU Wan-bing, FU Guang-sheng. Surface Oxidation and Photoluminescence Properties of Silicon Nanoparticle[J]. Chinese Journal of Luminescence, 2011,32(4): 347-352 DOI: 10.3788/fgxb20113204.0347.
Surface Oxidation and Photoluminescence Properties of Silicon Nanoparticle
The silicon nanoparticle have been grown by radio-frequency plasmas-enhanced chemical vapor deposition technique and the photoluminescence(PL)of the silicon suspension have been studied by both steady-state and time-resolved photoluminescence spectra. The steady-state PL spectra of the silicon suspension show that a blue PL band around 440 nm is found for the as-prepared silicon suspension emits. An increase of the intensity for the blue band around 440 nm followed by a red photoluminescence centered at 750 nm after storing the suspension for two months. The steady-state PL spectra excited by different wavelength and time-resolved PL spectra of the samples demonstrate that the blue PL band with a delaytime of nanosecond order is caused by the band-to-band recombination in Si nanocrystals. The oxidation of the silicon nanoparticle causes the decaytime increasing. The red PL band originates from radiation recombination of carries via defect/surface-related states and the delay-time of which is on the order of microsecond.
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