Effects of Firing Temperature and Time on the Luminescency of Phosphors in Strontium Aluminate System Co-Doped by Eusub2/subOsub3/sub and Dysub2/subOsub3/sub and Prepared by Solid State Reaction Processing

KARACAOĞLU, ERKUL; KARASU, BEKİR; KAYA, GÜRAY; YEŞİLAY, SELVİN

doi:10.4028/www.scientific.net/ast.62.82

Effects of Firing Temperature and Time on the Luminescency of Phosphors in Strontium Aluminate System Co-Doped by Eusub2/subOsub3/sub and Dysub2/subOsub3/sub and Prepared by Solid State Reaction Processing

Atıf İçin Kopyala

KARACAOĞLU E., KARASU B., KAYA G., YEŞİLAY S.

Advances in Science and Technology, cilt.62, ss.82-87, 2010 (Hakemli Dergi)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 62
Basım Tarihi: 2010
Doi Numarası: 10.4028/www.scientific.net/ast.62.82
Dergi Adı: Advances in Science and Technology
Sayfa Sayıları: ss.82-87
Anadolu Üniversitesi Adresli: Evet

Özet

Abstract:

In the current study long afterglow phosphors in strontium aluminate system doped with Eu2+ and Dy3+ were synthesized at different firing temperatures for various time. Photoluminescency and crystallisation during sintering under reducing atmosphere were examined as functions of sintering time and temparature. XRD was employed to characterize the crystal phases of phosphors. Scanning electron microscopy (SEM) investigations were carried out to understand surface morphology and to confirm the XRD results. The optical properties of the phosphors were investigated by a phosphorescence spectrophotometer. The changes in emission and excitation spectrum were discussed accounting firing time and temperature.