YELLOW EMITTING PHOSPHOR AND WHITE SEMICONDUCTOR LIGHT EMITTING DEVICE INCORPORATING THE SAME

摘要

The present invention relates to a yellow phosphor represented by a general formula of A(1-y)3D5-x Ex O12:Cey (wherein: A is at least one element selected from the group consisting of Y, Lu, Sc, La, Gd and Sm; D is at least one element selected from the group consisting of Al, Ga and In; E is at least one element selected from the group consisting of B and Fe; 0 <= x < 0.5; and 0.0001 <= y < 0.5), and a white semiconductor light emitting device incorporating the same. The white semiconductor light emitting device comprises a semiconductor light emitting diode, and a phosphor coating layer. The phosphor coating layer comprises yellow phosphor and optionally zinc selenium-based red phosphor that absorb a portion of light emitted by the semiconductor light emitting diode and emits light of wavelength different from that of the absorbed light and a transparent resin. The white semiconductor light emitting device has excellent color rendering and experiences only extremely low degrees of deterioration in emission efficiency in a long period of service.