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- W1972052629 abstract "LiAlO2 : Mn/Ce/Tb phosphors were prepared by combustion synthesis. LiAlO2 : Mn exhibits two thermally stimulated luminescence (TSL) peaks around 150 and 320 °C, while LiAlO2 : Ce/Tb exhibits TSL peaks around 170 and 280 °C. Photoluminescence emission of LiAlO2 : Mn consists of a peak around 500 nm when excited with 450 nm, while LiAlO2 : Ce shows a broad band around 400 nm when excited by 320 nm. The TSL emission spectra of LiAlO2 : Mn/Tb indicate that Mn2+/Tb3+ is the luminescence centre. LiAlO2 : Ce and LiAlO2 : Tb exhibit optically stimulated luminescence when stimulated with 470 nm light.Electron spin resonance (ESR) studies were carried out to identify defect centres responsible for TSL peaks observed in LiAlO2 : Ce. Room temperature ESR spectra of irradiated LiAlO2 : Ce/Tb phosphor appear to be in a superposition of at least four distinct centres. Two defect centres (centre I and centre II) are identified in irradiated LiAlO2 : Ce/Tb phosphor and these centres are assigned to O− and F+ centres, respectively. O− centre appears to correlate with the 170 °C TSL peak and F+ centre appears to correlate with both 170 and 280 °C TSL peaks in LiAlO2 : Ce." @default.
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- W1972052629 date "2008-05-16" @default.
- W1972052629 modified "2023-09-25" @default.
- W1972052629 title "Identification of defect centres using TSL, PL, OSL and ESR studies in LiAlO<sub>2</sub>based phosphors" @default.
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- W1972052629 doi "https://doi.org/10.1088/0022-3727/41/11/115414" @default.
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