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The Energy Transfer and Thermal Stability of a Blue‐Green Color Tunable K 2 CaP 2 O 7 :Ce 3+ ,Tb 3+ Phosphor
Author(s) -
Ding Yi,
Wang Luxiang,
Xu Mengjiao,
Jia Dianzeng,
Zhou Rui
Publication year - 2017
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.14470
Subject(s) - phosphor , luminescence , analytical chemistry (journal) , ion , materials science , thermal stability , spectroscopy , photoluminescence , fluorescence , emission spectrum , solid state lighting , terbium , atomic physics , spectral line , chemistry , optoelectronics , light emitting diode , optics , physics , organic chemistry , quantum mechanics , astronomy , chromatography
Novel blue‐green emitting Ce 3+ ‐ and Tb 3+ ‐activated K 2 CaP 2 O 7 ( KCPO ) luminescent materials were synthesized via a solid‐state reaction method. X‐ray diffraction, luminescence spectroscopy, decay time, and fluorescent thermal stability tests have been used to characterize the prepared samples. The KCPO :Ce 3+ ,Tb 3+ luminescence spectra show broad band of Ce 3+ ions and characteristic line of Tb 3+ ion transition ( 5 D 4 – 7 F 5 ). The color variation in the light emitting from blue to green under UV excitation can be obtained by tailoring the Tb 3+ content in KCPO :Ce 3+ . Besides, Ce 3+ ions obviously intensify Tb 3+ ion emission through an effective energy transfer process, which was confirmed from decay curves. The energy transfer efficiency was determined to be 82.51%. A resonant type mechanism via the dipole–quadrupole interaction can be proposed for energy transfer. As a whole, the KCPO :Ce 3+ ,Tb 3+ phosphor exhibits excellent performance in the range from 77 to 673 K, indicating the phosphors are highly potential candidates for solid‐state lighting.