Journal
OPTICS EXPRESS
Volume 11, Issue 10, Pages 1237-1242Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.11.001237
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Aging effects of porous silicon (PS) and the origin of blue shift are investigated. Photoluminescence (PL) measurements of the PS prepared with HF-EtOH solution showed a 210 meV blue shift after 1.5 months. It is found from deconvolution of the PL spectra that this shift is not fully related to the quantum confinement (QC) effect. For stable PS formation, a HF-EtOHH2O2 solution is used. A stable luminescence at 2.01 eV with a Gaussian distribution is obtained when the samples are kept in H2O2 for 45 min after the anodization. (C) 2003 Optical Society of America.
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