Patent ID: 10851296

Abstract:
Provided is a fluorescent material having a composition of rare earth aluminum-gallate, which radiates light in not only a visible light region but also a near-infrared region and has improved light emission intensity in a near-infrared region. The fluorescent material has a composition of rare earth aluminum-gallate, including at least one rare earth element Ln selected from the group consisting of Y, Gd, Sc, Lu, and La; at least one element selected from Al and Ga; Ce; and Nd. When a total molar composition ratio 5 of Al and Ga is used as a basis, a total molar ratio of Ln, Ce, and Nd is 3; a molar ratio of Ce is a product of 3 and a value of a parameter x; a molar ratio of Nd is a product of 3 and a value of a parameter y. The parameter x is in a range of 0.03 or more and 0.015 or less. The parameter y is in a range of 0.002 or more and 0.06 or less.