RED PHOSPHOR MATERIAL, WHITE LIGHT-EMITTING DIODE USING THE SAME, AND ILLUMINATOR USING THE WHITE LIGHT-EMITTING DIODE

摘要

PPROBLEM TO BE SOLVED: To provide a white light-emitting diode improved in color reproducibility, color rendering tendency and luminous efficiency. PSOLUTION: A red phosphor material consisting of an europium-activated lithium-lanthanum niobate of the general formula: LiLaSB1-x/SBEuSBx/SBNbSB2/SBOSB7/SB(0x1) is provided. The white light-emitting diode using the red phosphor material is also provided. This diode efficiently emits in the luminous wavelength region for ultraviolet light-emitting diode, i.e. 350-410 nm and also can efficiently convert to red color the blue color of about 465 nm wavelength and the green color of about 538 nm wavelength, respectively. PCOPYRIGHT: (C)2005,JPO&NCIPI