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Synthesis of BaSi 2 O 2 N 2 :Ce 3+ ,Eu 2+ Phosphors and Determination of their Luminescence Properties
Author(s) -
Song Xiufeng,
Fu Renli,
Agathopoulos Simeon,
He Hong,
Zhao Xinran,
Yu Xiaodong
Publication year - 2011
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/j.1551-2916.2010.04092.x
Subject(s) - phosphor , luminescence , analytical chemistry (journal) , doping , emission spectrum , emission intensity , ion , materials science , photoluminescence , quenching (fluorescence) , spectral line , chemistry , fluorescence , optoelectronics , optics , physics , organic chemistry , chromatography , astronomy
BaSi 2 O 2 N 2 :Ce 3+ ,Eu 2+ phosphors were successfully synthesized via the solid‐state reaction method. Their luminescence properties were experimentally investigated and qualify them for further consideration as components in white light‐emitting diodes. In particular, BaSi 2 O 2 N 2 :Eu 2+ phosphors have an efficient bluish–green emission band that peaks at 490 nm. Ce 3+ ‐doped BaSi 2 O 2 N 2 showed a bright emission band at 390 nm. A red shift tuning capability of emission bands was achieved by increasing the Eu 2+ or Ce 3+ contents. Measurements of the intensity of emission spectra suggested a concentration quenching effect for both Eu 2+ and Ce 3+ . Analysis of the experimental results suggests that the enhancement of emission intensity in the produced codoped BaSi 2 O 2 N 2 :Ce 3+ ,Eu 2+ phosphors is due to resonance‐type energy transfer from Ce 3+ to Eu 2+ ions, which is predominantly governed by dipole–dipole interaction mechanism. The efficiency of energy transfer was calculated and the critical distance of energy transfer between Ce 3+ and Eu 2+ was determined as ∼25 Å.