SILICATE-BASED GREEN LIGHT-EMITTING PHOSPHOR CAPABLE OF PREVENTING THE CHANGE OF LUMINOUS INTENSITY BY TEMPERATURE CHANGE DUE TO HEATING DURING OPERATING AN LED

摘要

PURPOSE: A silicate-based green light-emitting phosphor is provided to improve the stability of luminous intensity against heat, thereby being used as a green light-emitting apparatus the temperature of which is increased up to 120 °C.;CONSTITUTION: A silicate-based green light-emitting phosphor is formed by recovering a strontium barium silicate by europium, has at least one phase of a magnesium oxide or a merwinite crystalline phase, and contains 0.15-0.90 mol of magnesium per 1 mol of silicon. Provided that a light of a 400 nm wavelength is excited, the silicate-based green light-emitting phosphor emits a green light with a peak wavelength of 510-530 nm, and the silicate-based green light-emitting phosphor emits blue light, of which the luminous intensity is 0.0015-0.020 provided that a peak wavelength is 435-450 nm and the luminous intensity of the green light is 1.;COPYRIGHT KIPO 2013