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New single‐component multicolor emission Na 1−x Al 1+2x Si 1−2x O4:xBi 3+ /Eu 3+ phosphors via energy transfer
Author(s) -
Xu Chengyi,
Sheng Ye,
Song Yanhua,
Guan Hongxia,
Zhang Xiangting,
Meng Deyue,
Zhu He,
Shi Zhan,
Zou Haifeng,
Zheng Keyan
Publication year - 2018
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.15394
Subject(s) - phosphor , materials science , analytical chemistry (journal) , luminescence , thermal stability , electroluminescence , emission intensity , ion , emission spectrum , optoelectronics , chemistry , spectral line , physics , nanotechnology , organic chemistry , chromatography , layer (electronics) , astronomy
A series of emission‐tunable Na 1−x Al 1+2x Si 1−2x O 4 :xBi 3+ /Eu 3+ phosphors were synthesized via high temperature solid‐state reaction method. The luminescence properties, energy transfer from Bi 3+ to Eu 3+ ions, color tuning, thermal stability and quantum efficiency were systematically investigated. Especially, in the host, a certain amount of Si 4+ were replaced by Al 3+ in order to remedy the charge compensating defect, so that, the emission intensity had been improved. The results of Rietveld refinements, the analysis of SEM mapping and the fourier transform infrared (FT‐IR) indicated that this charge balance strategy was an effective method. Meanwhile, the energy transfer from Bi 3+ to Eu 3+ can be inferred and confirmed and the mechanisms were demonstrated to quadrupole–quadrupole interaction. The emission hue can be tuned from blue to pink, and finally to orange red light by properly varying the ratio of Bi 3+ and Eu 3+ . Importantly, when the temperature was raised to 150°C, the integrated emission intensity was 71.20% of the initial value for NAS:1%Bi 3+ ,2%Eu 3+ samples indicating that these phosphors had excellent thermal stability and stable color (no emission shift). All these properties indicate that the developed phosphors may be potentially used as single‐component color‐tunable‐emitting phosphors for UV light‐emitting diodes.