Structural and optical properties of CdTe nanocrystals embedded in KH2PO4 (KDP) dielectric crystal

In the present work, KH2PO4 (KDP) crystals doped with CdTe have been grown in aqueous solution supersaturated at 50 deg C using the lowering temperature method. X-ray diffraction spectra have shown that CdTe inclusions have been obtained with an average size of about 24nm. The optical gap (Eg=2.85eV...

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Bibliographic Details
Published in:Journal of Optoelectronics and Advanced Materials 2008-11, Vol.10 (11), p.3051-3053
Main Authors: Bensouici, A, Plaza, J L, Halimi, O, Boudine, B, Sebais, M, Dieguez, E
Format: Article
Language:English
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Summary:In the present work, KH2PO4 (KDP) crystals doped with CdTe have been grown in aqueous solution supersaturated at 50 deg C using the lowering temperature method. X-ray diffraction spectra have shown that CdTe inclusions have been obtained with an average size of about 24nm. The optical gap (Eg=2.85eV) was deduced from the UV-vis absorption spectra. The gap widening compared with bulk CdTe crystals could be due to the nanometric size of CdTe particles (-2nm), revealing the intrinsic quantum confinement effect of these nanocrystals. Nevertheless, following experimental results from structural and optical characterisation the estimation of the CdTe particles size data shows a great dispersion, which must be taking into account. Furthermore, the possibility of embedding II-VI CdTe nanoparticles in KDP crystalline matrix has been proved.
ISSN:1454-4164