"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Influence of preparation technique and Pr3+ doping on the absorption edge, photoluminescence, and Raman spectra of 70TeO2∙30PbCl2 glasses

V. TRNOVCOVÁ1, I. FURÁR1,* , M. KADLEČÍKOVÁ2, J. GREGUŠ3, J. PEDLÍKOVÁ4, M. OŽVOLDOVÁ5, O. BOŠÁK1

Affiliation

  1. Faculty of Materials Science and Technology, Slovak University of Technology, 917 24 Trnava, Slovakia
  2. Faculty of Electro-engineering and Informatics, Slovak University of Technology, 812 19 Bratislava, Slovakia
  3. Faculty of Mathematics, Physics & Informatics, Comenius University, 842 48 Bratislava, Slovakia
  4. Institute of Inorganic Chemistry, Academy of Sciences of Czech Republic, CZ-166 28 Prague, Czech Republic
  5. Trnava University, 918 43 Trnava, Slovakia

Abstract

Tellurite glasses, 70TeO2.30PbCl2, were prepared in Au and Pt crucibles. Pr3+ ions were added in different chemical forms (metals, chlorides, oxides), in concentrations of 500 – 1500 wt-ppm. In the range of 640-700 nm, six photoluminescence (PL) peaks were observed, at 641.5, 647.1, 652.4, 660.8, 662.9, and 664,5 nm, both in “pure” and doped glasses. In the range of 200 – 1200 cm-1, seven Raman scattering (RS) peaks were observed, at 184, 217, 321, 468, 654, 735 cm-1, and a small peak at 650 cm-1. Both spectra were deconvoluted using symmetrical Gaussian functions. Energies, amplitudes and half-widths of band maximums were free parameters. Doping with Pr3+ and reactions with crucibles result in structural changes of tellurite polyhedrons. The influence of Pr3+ on the local structure is similar to that of incorporated Au+ from the crucible. Relative intensities of PL bands and RS ones depend on the concentration of Pr3+ and on the material of the crucible. Positions of these bands are independent of Pr3+ concentration and of the material of the crucible. The form, slope, and position of the absorption edge depend on the material of the crucible, and on the concentration and chemical form of Pr. Absorption edge of glasses prepared in Au crucibles is much sharper and shifted to shorter wave-length in comparison to that of glasses prepared in Pt crucibles..

Keywords

Tellurite/lead chloride glasses, Pr3+ doping, Absorption, Photoluminescence, Raman scattering, Au, Pt crucibles.

Submitted at: July 3, 2007
Accepted at: Oct. 15, 2007

Citation

V. TRNOVCOVÁ, I. FURÁR, M. KADLEČÍKOVÁ, J. GREGUŠ, J. PEDLÍKOVÁ, M. OŽVOLDOVÁ, O. BOŠÁK, Influence of preparation technique and Pr3+ doping on the absorption edge, photoluminescence, and Raman spectra of 70TeO2∙30PbCl2 glasses, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 10, pp. 3223-3228 (2007)