Controlling the morphology and size of (Gd0.98−xTb0.02Eu x )2O3 phosphors presenting tunable emission: formation process and luminescent properties

Wang, Wenzhi; Li, Jinkai; Liu, Zongming

doi:10.1007/s10853-018-2505-z

Cited by 9 publications

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References 62 publications

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“…Figure 5 shows the PLE and PL properties of the (Lu 0.975 Dy 0.025 )AG phosphors calcined at 1100 °C. As seen in the figure, the PLE spectra possess similar shape for all the samples with different R values and consist five excitation peaks at ~297 nm, ~327 nm, ∼353 nm, ~367 nm, and ~387 nm ascribed to the matrix absorption, 6 4,9,18 , respectively, with the ∼353 nm being dominant. Under the optimal excitation wavelength at 353 nm, the PL spectra displays strong blue emission (∼481 nm) and yellow emission (∼582 nm) due to the magnetic dipole 4 F 9/2 → 6 H 15/2 and electric dipole 4 F 9/2 → 6 H 13/2 transition of Dy 3+ , respectively 4,9,18 .…”

Section: Resultsmentioning

confidence: 75%

“…The spherical [(Lu 1-x Gd x ) 0.975 Dy 0.025 ]AG phosphors developed in this work were chosen according to the following reasons: (1) the luminescent properties of phosphor were strongly dependent on the particle morphology and size 6 . The particle with uniform size and spherical morphology not only improves the resolution of fluorescent devices, but also facilitates compact fluorescent layer self-assembly easily.…”

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confidence: 99%

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Enhanced Dy3+ white emission via energy transfer in spherical (Lu,Gd)3Al5O12 garnet phosphors

Wang

Liu

et al. 2020

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the Dy 3+ doped (Lu,Gd) 3 Al 5 o 12 garnet phosphors with spherical morphology were obtained via homogeneous precipitation method, followed by calcination at 1100 °C. The particle morphology does not change significantly, but can be controlled by adjusting the urea content. The synthesis, structure, luminescent properties of precursor and resultant particles were analyzed by the combined technologies of XRD, FE-SEM, PLE/PL decay behavior. The (Lu 0.975 Dy 0.025 )AG phosphors display strong blue and yellow emission at ~481 nm ( 4 f 9/2 → 6 H 15/2 transition of Dy 3+ ) and ~582 nm 4 f 9/2 → 6 H 13/2 transition of Dy 3+ ), respectively. The phosphors have similar color coordinate and temperature of (~0.33, ~0.34), ~5517 K, respectively, which are closed to the white emission. The particle size and luminescent intensity decreased while the lifetime increased with the urea concentration increasing. the Gd 3+ addition does not alter the shape/position of emission peaks, but enhance the blue and yellow emission of Dy 3+ owing to the efficient Gd 3+ → Dy 3+ energy transfer. The [(Lu 1-x Gd x ) 0.975 Dy 0.025 ] 3 Al 5 o 12 phosphors are expected to be widely used in the lighting and display areas.

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