Details

Autor(en) / Beteiligte

• Caldiño, U.
• Álvarez, E.
• Speghini, A.
• Bettinelli, M.

Titel

Cold and warm white light generation using Zn(PO3)2 glasses activated by Ce3+, Dy3+ and Mn2

Ist Teil von

• Journal of luminescence, 2012-08, Vol.132 (8), p.2077-2081

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• The photoluminescence of zinc metaphosphate glasses activated by Dy3+, Ce3+/Dy3+ and Ce3+/Dy3+/Mn2+ ions was investigated. Non-radiative energy transfers from Ce3+ to Dy3+ and Ce3+ to Mn2+ are observed upon 280nm excitation. The non-radiative nature of these transfers is inferred from the increase in the decay rate of the Ce3+ emission when the glass is co-doped with Dy3+ or Dy3+/Mn2+. It is demonstrated that zinc metaphosphate glasses can generate cold or warm white light emission when they are doped with Ce3+/Dy3+ or Ce3+/Dy3+/Mn2+ and pumped at 280nm (peak emission wavelength of AlGaN-based LEDs). The CIE1931 chromaticity coordinates and color temperature were (0.34, 0.35) and 5250K for the cold light, and (0.47, 0.43) and 2700K for the warm light. ► Non-radiative energy transfer from Ce3+ to Dy3+ and Mn2+ takes place in Zn(PO3)2 glasses doped with Ce3+/Dy3+/Mn2+. ► Zn(PO3)2 glasses doped with Ce3+/Dy3+ can generate 5250K cold white light emission. ► Zn(PO3)2 glasses doped with Ce3+/Dy3+/Mn2+ can generate 2700K warm yellowish orange light emission.