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- W3208751493 abstract "Benefiting from a novel phosphor screening method based on single crystal X-ray diffractometry and single-particle spectroscopy, i.e., the single-particle-diagnosis approach, a new Eu2+-activated cyan-emitting oxynitride phosphor (Si2.5Al9.5O0.5N12.5:Eu2+) was discovered. Single crystal X-ray diffraction analysis of the particle revealed that this sialon-polytypoid crystallizes in the Cmcm space group (No. 63) with a = 3.0704 Å, b = 18.6697 Å, c = 35.7178 Å, and Z = 8. The analyzed orthorhombic structure is built up of highly condensed networks that constructed from linked [MX4] (M = Si, Al; X = O, N) tetrahedra. Although there are no obvious crystalline sites able to accommodate larger Eu2+ ions in the host, the time-resolved streak imaging of a single crystalline particle indicates that the cyan-emitting band peaking at ∼500 nm with a relatively narrow full-width at half-maximum (FWHM) of ∼61 nm exhibits a typical Eu2+ fluorescent lifetime (∼0.39 μs) in oxynitrides. Besides, slight lifetime variation (0.32 μs vs 0.47 μs) between shorter wavelength region (450–500 nm) and longer wavelength region (500–550 nm) of the Eu2+ emission band may suggest two different crystalline environments around Eu2+. This sialon-polytypoid cyan-emitting phosphor with efficient excitability at 365 nm may find its potential application as an all-inorganic color-converter in near-ultraviolet (NUV) excited wLEDs." @default.
- W3208751493 created "2021-11-08" @default.
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- W3208751493 date "2021-11-01" @default.
- W3208751493 modified "2023-09-27" @default.
- W3208751493 title "Cyan-Emitting Sialon-Polytypoid Phosphor Discovered by a Single-Particle-Diagnosis Approach" @default.
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- W3208751493 doi "https://doi.org/10.1149/2162-8777/ac331c" @default.
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