Photophysical properties of highly efficient red-emitting CaTiO 3:Eu 3+ phosphors under near ultra-violet excitation

The photophysical properties of europium-doped calcium titanate for near ultra-violet excitation were studied in order to investigate whether it is applicable to white light-emitting diodes. CaTiO 3:Eu 3+ phosphors were synthesized by using the solid-state reaction method. The structures and basic p...

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Bibliographic Details
Published in:Current applied physics 2011, 11(6), , pp.1379-1383
Main Authors: Ha, Myoung Gyu, Lee, Jin Hwa, Bae, Jong Seong, Kim, Jong Pil, Hong, K.S., Yang, Ho-Soon
Format: Article
Language:English
Subjects:
CaTiO 3
Eu 3
Near ultra-violet excitation
Red-emitting phosphors
Solid state reaction
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Summary:The photophysical properties of europium-doped calcium titanate for near ultra-violet excitation were studied in order to investigate whether it is applicable to white light-emitting diodes. CaTiO 3:Eu 3+ phosphors were synthesized by using the solid-state reaction method. The structures and basic properties of the phosphors were characterized by using X-ray diffractometer, scanning electron microscope, UV-visible spectrophotometer, and X-ray photoelectron spectrometer. The photophysical properties were examined by taking excitation and emission spectra. A strong red luminescence corresponding to 5 D 0 → 7 F 2 transition of Eu 3+ under near ultra-violet excitation was observed. It was found that CaTiO 3:Eu 3+ was a red-emitting phosphor and had higher efficiency for operation under near ultra-violet excitation. ► CaTiO 3:Eu 3+ phosphors are synthesized by using the solid-state reaction method. ► Strong luminescence corresponding to 5 D 0 → 7 F 2 under near UV excitation was observed. ► CaTiO 3:Eu 3+ had higher efficiency for operation under near ultra-violet excitation.
ISSN:1567-1739
1878-1675
DOI:10.1016/j.cap.2011.04.008