Phosphor and light emitting device

摘要

The present invention provides a phosphor emitting green fluorescence when being effectively excited by excitation light in a wavelength range from blue light to near-ultraviolet light, having an emission intensity that does not vary significantly with variation in the wavelength of the excitation light, and being manufactured easily. The phosphor includes a chemical structure represented by the following general formula (A):
A(M1-a-xEuaMnx)L(Si1-bGeb)2O7,  (A),
where A is one or more elements selected from Li, Na, and K, M is one or more elements selected from Mg, Ca, Sr, Ba, and Zn, L is one or more elements selected from Ga, Al, Sc, Y, La, Gd, and Lu, a is a numerical value satisfying 0.001≦a≦0.3, b is a numerical value satisfying 0≦b≦0.5, and x is a numerical value satisfying 0≦x≦0.2.

主权项

1. A phosphor comprising a chemical structure represented by the following general formula (A):
A(M1-a-xEuaMnx)L(Si1-bGeb)2O7,  (A) wherein A is one or more elements selected from the group consisting of Li, Na, and K, M is one or more elements selected from the group consisting of Mg, Ca, Sr, Ba, and Zn, L is one or more elements selected from the group consisting of Ga, Al, Sc, Y, La, Gd, and Lu, a is a numerical value satisfying 0.001≦a≦0.3, b is a numerical value satisfying 0≦b≦0.5, and x is a numerical value satisfying 0≦x≦0.2.