Ultraviolet emission from porous silicon photosynthesized in aqueous alkali fluoride solutions
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概要
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Stable ultraviolet (UV) photoluminescence (PL) has been observed at room temperature in poroussilicon (PSi) fabricated by photoetching in aqueous alkali fluoride solutions. The aqueous solutionsused are 1 M NaF and 1 M KF.They give an alkaline reaction caused by partial hydrolysis. The PLpeaks at ～3.3 eV have a full width at half maximum of ～0.1 eV, which is much smaller than thosereported previously (?0.5 eV). Spectral analyses suggest that both quantum confinement andsurface passivation effects enable the observation of UV emission in NaF- and KF-prepared PSisamples.
- 2006-07-01
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