Microstructure and photoluminescence of CdS-doped silica films grown by RF magnetron sputtering

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

6 Scopus Citations
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Author(s)

  • A. G. Rolo
  • M. V. Stepikhova
  • S. A. Filonovich
  • C. Ricolleau
  • M. I. Vasilevskiy
  • And 1 others
  • M. J M Gomes

Detail(s)

Original languageEnglish
Pages (from-to)44-49
Journal / PublicationPhysica Status Solidi (B) Basic Research
Volume232
Issue number1
Publication statusPublished - 2002
Externally publishedYes

Abstract

Silica films containing CdS nanometer-sized particles with semiconductor contents of 1-10% were produced by radio-frequency magnetron sputtering at room temperature with subsequent annealing. The mean diameter of the CdS nanocrystals (NCs) varied between 4 and 6 nm, with narrow size distribution. High-resolution transmission electron microscopy images obtained for low-semiconductor-fraction samples showed quite a homogeneous NC distribution inside the silica matrix, while the high-concentration samples showed an agglomeration of NCs in a columnar structure. The observed photoluminescence (PL) bands were correlated with the semiconductor concentration. Two intense PL bands, one near the band-gap energy and the other in the red, were observed at low temperature for samples with low CdS fraction. The high-energy band was found to be Stokes shifted by some 200 meV with respect to the absorption edge at room temperature. The samples with high CdS fraction only displayed a broad red emission band, which was attributed to interface states.

Citation Format(s)

Microstructure and photoluminescence of CdS-doped silica films grown by RF magnetron sputtering. / Rolo, A. G.; Stepikhova, M. V.; Filonovich, S. A. et al.
In: Physica Status Solidi (B) Basic Research, Vol. 232, No. 1, 2002, p. 44-49.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review