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

28 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
Pages (from-to)R163-R168
JournalECS Journal of Solid State Science and Technology
Volume1
Issue number6
DOIs
Publication statusPublished - 2012 Dec 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Fingerprint Dive into the research topics of 'Photoluminescence properties of green-emitting YBO<sub>3</sub>:Ce <sup>3+</sup>, Tb<sup>3+</sup> phosphor for near UV excitation'. Together they form a unique fingerprint.

  • Cite this