Premium
Visible Quantum Cutting and Energy Transfer in Tb 3+ ‐Doped KSr ( Gd , Y )( PO 4 ) 2 Under VUV – UV Excitation
Author(s) -
Zhao Lei,
Wang Deyin,
Wang Yuhua,
Tao Ye
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13235
Subject(s) - phosphor , doping , analytical chemistry (journal) , ion , quantum efficiency , energy transfer , materials science , chemistry , optoelectronics , chromatography , organic chemistry , molecular physics
KSr ( Gd , Y )( PO 4 ) 2 : Tb 3+ phosphors were synthesized using the high‐temperature solid‐state reaction method. The VUV – UV spectroscopic properties of these phosphors were studied. The results show that efficient energy transfer (ET) from Gd 3+ to Tb 3+ occurs in this system, and the ET efficiency increases with increasing of Tb 3+ doping concentrations, which is evidenced that both the emission intensity and decay time of Gd 3+ decreases with increasing Tb 3+ doping concentrations. Visible quantum cutting via cross relaxation between the neighboring Tb 3+ ions was observed in the high Tb 3+ concentration doped sample. In addition, the emission color of KSr ( Gd , Y )( PO 4 ) 2 : Tb 3+ phosphors can be tuned from blue to yellowish‐green by varying the doping concentration of Tb 3+ . Under 147 nm excitation, the sample KSrGd 0.5 ( PO 4 ) 2 : 0.5 Tb 3+ exhibits the strongest emission, which is about 70% of the commercial green‐emitting phosphor Zn 2 SiO 4 : Mn 2+ indicating the potential application of this phosphor for plasma display panels, Hg‐free lamps, and three‐dimensional displays.