Green light emitting phosphor and light emitting device

Details Green light emitting phosphor and light emitting device Green light emitting phosphor and light emitting device

2007-07-03

2007-07-03

Koslow, C. Melissa (Department: 1755)

Compositions

Inorganic luminescent compositions

Tungsten containing

C252S30140R, C313S503000, C257S098000

Reexamination Certificate

active

10902849

ABSTRACT:
As a green light emitting phosphor capable of emission upon excitation with light having a wavelength of 350 to 500 nm, characterized in containing Tb3+ions as emission ions in high concentrations without causing concentration quenching, the present invention provides a green light emitting phosphor capable of emission upon excitation with light having a wavelength of 350 to 500 nm, characterized by having a composition represented by the compositional formula (1):in-line-formulae description="In-line Formulae" end="lead"?ATbxLn(1-x)M2O8  (1)in-line-formulae description="In-line Formulae" end="tail"?wherein A is at least one element selected from the group consisting of Li, Na, K, and Ag,Ln is at least one element selected from rare earth elements including Y and excluding Tb,M is at least one element selected from the group consisting of Mo and W, andx is a positive number satisfying 0.4≦x≦1, and a light emitting device incorporated with the green light emitting phosphor.

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Phillips et al, “Photo- and cathodoluminescence of hydrothermally synthesised Y3AI5012:Tb and NaY(WO4)2:Tb”, Ceramic Transactions (1996), 67 (Synthesis and Applications of Lanthanide-Doped Materials), pp. 89-1122.

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