Title:

Luminescence based on energy transfer in xerogels doped with Tb2–xEux(WO4)3

Group publication title:

Optica Applicata

Creator:

Grobelna, Beata

Contributor:

Gaj, Miron. Redakcja ; Urbańczyk, Wacław. Redakcja

Subject and Keywords:

optyka ; photoluminescence ; lanthanide(III) ions ; sol–gel method ; energy transfer

Description:

Optica Applicata, Vol. 38, 2008, nr 1, s. 39-47

Abstrakt:

A series of luminescent materials consisting of Tb2–xEux (WO4)3 entrapped in silica xerogel were successfully prepared. The parameter x in the formula changed from 0.4 to 2. Spectroscopic properties such as absorption and luminescence of optically active ions were studied at room temperature. Owing to the energy transfer from the WO42- groups (ligand–metal charge transfer, (LMCT)) the lanthanide ions show their characteristic emissions in Tb2–xEux(WO4)3 entrapped in silica xerogel, i.e., 5D0 → 7FJ (J = 0, 1, 2, 3, 4) transition for Eu3+ ion and 5D4 → 7FJ (J = 6, 5, 4, 3) transition for Tb3+ ion. The energy transfer is effective for the mixed tungstate salt Tb1.35Eu0.65(WO4)3 entrapped in silica xerogel. The Eu(III) emission intensity in the materials under study increases with an increase in the annealing temperature from 600 to 900 °C. This is due to the removal of the effective O –H quenchers from the coordination sphere of the Eu(III) ion.

Publisher:

Oficyna Wydawnicza Politechniki Wrocławskiej

Place of publication:

Wrocław

Date:

2008

Resource Type:

artykuł

Source:

<sygn. PWr A3481II> ; click here to follow the link ; click here to follow the link

Language:

eng

Relation:

Optica Applicata ; Optica Applicata, Vol. 38, 2008 ; Optica Applicata, Vol. 38, 2008, nr 1 ; Politechnika Wrocławska. Wydział Podstawowych Problemów Techniki

Rights:

Wszystkie prawa zastrzeżone (Copyright)

Access Rights:

Dla wszystkich w zakresie dozwolonego użytku

Location:

Politechnika Wrocławska