High Concentration of Bi³+ Incorporated into RNbO₄:Eu³+ (R = La, Y, Gd) as Red Phosphors for White LED Applications

다국어 초록 (Multilingual Abstract)

Ultraviolet light from nitride semiconductor LEDs is to be converted
into white light with high color rendering, the phosphors should
efficiently absorb the pump LED light. The absorption bands of
YNbO₄:Eu³+ and GdNbO₄:Eu³+ are red-shifted with
Bi³+ incorporation in the lattice. The excitation band maximum
and the long-wavelength band edge of the YNbO₄:Eu³+ red
phosphor have been severely red-shifted at high Bi³+ contents.
With 15 atom\% of Bi³+ incorporation in the lattice,
(Y0.80Bi0.15)NbO₄:Eu³+, the absorption band edge
shifts to 352 nm, which will efficiently absorb the LED pump-light
in the long-wavelength UV region.

다국어 초록 (Multilingual Abstract)

Ultraviolet light from nitride semiconductor LEDs is to be converted
into white light with high color rendering, the phosphors should
efficiently absorb the pump LED light. The absorption bands of
YNbO₄:Eu³+ and GdNbO₄:Eu³+ are red-shifted with
Bi³+ incorporation in the lattice. The excitation band maximum
and the long-wavelength band edge of the YNbO₄:Eu³+ red
phosphor have been severely red-shifted at high Bi³+ contents.
With 15 atom\% of Bi³+ incorporation in the lattice,
(Y0.80Bi0.15)NbO₄:Eu³+, the absorption band edge
shifts to 352 nm, which will efficiently absorb the LED pump-light
in the long-wavelength UV region.

참고문헌 (Reference)

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