λ-modulation absorption spectra and photochromic effect in Bi12SiO20: Fe single crystal

Using optical absorption and λ-modulated differential spectroscopy we investigated non-doped and Fe-doped Bi12SiO20 sillenite-type crystals. The obtained results show that the doping increase absorption coefficient of the crystal shifts the absorption edge to lower photon energies, and reduce the ab...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2010-11, Vol.15 (1), p.012070
Main Authors: Petkova, P, Kostova, B, Marinova, V, Tacheva, J
Format: Article
Language:English
Subjects:
Absorption spectra
Absorptivity
Bismuth silicon oxide
Crystals
Energy levels
Photochromism
Single crystals
Spectrum analysis
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Summary:Using optical absorption and λ-modulated differential spectroscopy we investigated non-doped and Fe-doped Bi12SiO20 sillenite-type crystals. The obtained results show that the doping increase absorption coefficient of the crystal shifts the absorption edge to lower photon energies, and reduce the absorption shoulder. We find out that the optical absorption spectroscopy is appropriate method for analyzing the photochromic effect, while λ-modulated differential spectroscopy is most suitable for investigation of impurity levels in the band-gap and calculation of Fe3+energy levels position.
ISSN:1757-899X
1757-8981
1757-899X
DOI:10.1088/1757-899X/15/1/012070