Photoluminescence properties of green-emitting YBO3: Ce 3+, Tb3+ phosphor for near UV excitation

Ryu Sato, Satoru Takeshita, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji Niikura

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

YBO3:Ce3+,Tb3+ phosphor was prepared from rare earth oxides and boric acid by a solid state reaction. The phosphor absorbs near UV light through 4f-5d transitions of Ce3+, followed by broad emissions through 5d-4f transitions of Ce3+ and sharp emissions through 4f-4f transitions of Tb3+. Spectroscopic investigations for samples with various Ce3+ and Tb3+ concentrations reveal nonradiative energy transfer from Ce3+ to Tb3+. Emission color of the YBO3:Ce3+,Tb3+ varies from blue (0.163, 0.019) to green (0.321, 0.585) depending on the Ce3+ and Tb3+ concentrations. The optimized green-emitting Y 0.82Ce0.03Tb0.15BO3 phosphor has an emission color of (0.309, 0.547) with an external quantum efficiency of 76.7%. The photoluminescence intensity of this phosphor at 150°C keeps 87% of its intensity at room temperature, showing sufficient thermal stability for white light emitting diode applications.

Original languageEnglish
JournalECS Journal of Solid State Science and Technology
Volume1
Issue number6
DOIs
Publication statusPublished - 2012

    Fingerprint

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this