Multicolor tunable nanophosphor and its synthesis method and transparent polymer composite including the nanophosphor
AssigneeKorea Institute of Science and Technology
InventorsHo Seong JANG, Su Yeon KIM, Sun Jin KIM, So-Hye CHO, Seung Yong LEE
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Abstract
The present invention relates to a nanophosphor which may be used as a wavelength conversion part of a solar cell, a fluorescent contrast agent, and a light emitting part of a display device, and a synthesis method thereof. The nanophosphor of the present invention is excited by ultraviolet light to exhibit strong green light emission, and has multicolor light emission characteristics capable of controlling a color such as green, yellowish green, yellow, and orange color by only adjusting the amount of a doping agent.
Claims11
A fluoride-based LiYF4 nanophosphor co-doped with Ce3+ and Tb3+, which is represented by the following Formula 1:
- LiY1-x-yF4:Ce3+x, Tb3+y [Formula 1]
- (x is a real number in the range of 0.01≦x≦0.2, and y is a real number in the range of 0.01≦y≦0.3).
A fluoride-based multicolor light emission LiYF4 nanophosphor co-doped with Ce3+, Tb3+ and Eu3+ which is represented by the following Formula 2:
- LiY1-x-y-zF4:Ce3+x, Tb3+y, Eu3+z [Formula 2]
- (x is a real number in the range of 0.1≦x≦0.15, y is a real number in the range of 0≦y≦0.2, and z is a real number in the range of 0≦z≦0.1).
A fluoride-based nanophosphor having a core/shell structure, wherein the core is represented by the following Formula 1 or 2, and the shell is represented by the following Formula 3:
- LiY1-x-yF4:Ce3+x, Tb3+y [Formula 1]
- (x is a real number in the range of 0.01≦x≦0.2, and y is a real number in the range of 0.01≦y≦0.3).
- LiY1-x-y-zF4:Ce3+x, Tb3+y, Eu3+z [Formula 2]
- (x is a real number in the range of 0.1≦x≦0.15, y is a real number in the range of 0≦y≦0.2, and z is a real number in the range of 0≦z≦0.1).
- LiY1-rMrF4 [Formula 3]
- (r is a real number in the range of 0≦r<1, and M is a lanthanide element selected from the group consisting of La, Pr, Nd, Pm, Sm, Er, Gd, Dy, Ho, Tm, Lu and a combination thereof).
Dependencies are inferred from the claim text.