The present invention relates to a
terbium borate-based yellow
phosphor, a preparation method thereof, and a white
semiconductor light emitting device incorporating the same. The
terbium borate-based yellow
phosphor of the present invention is represented by the general formula (Tb1-x-y-zREXAy)3DaBbO12:Cez (where, RE is at least one
rare earth element selected from the group consisting of Y, Lu, Sc, La, Gd, Sm, Pr, Nd, Eu, Dy, Ho, Er, Tm and Yb; A is a typical
metal element selected from the group consisting of Li, Na, K, Rb, Cs and Fr; D is a typical amphoteric element selected from the group consisting of Al, In and Ga; 0≦x<0.5; 0≦y<0.5; 0<z<0.5; 0<a<5; and 0<b<5). The white
semiconductor light emitting device of the present invention comprises a
semiconductor light emitting diode and the yellow
phosphor, which absorbs a portion of light emitted by the semiconductor
light emitting diode and emits light of
wavelength different from that of the absorbed light. It offers
white light from the combination of the light emitted by the semiconductor
light emitting diode and the light emitted by the yellow phosphor. The white semiconductor
light emitting device of the present invention offers a greatly improved color rendering and experiences less deterioration in
light emission efficiency over a long period of service.