NEW COMPOSITION OF CE3+ ACTIVATED CALCIUM SILICATE YELLOW FLUORESCENT SUBSTANCE AND WHITE LIGHT EMITTING DIODE CONTAINING IT

摘要

PPROBLEM TO BE SOLVED: To provide a yellow fluorescent substance with wide luminescent wave band and activated by a blue LED. PSOLUTION: The CeSP3+/SPactivated calcium silicate yellow fluorescent substance is shown by a composition formula of (1): (CaSB1-y/SBMSBy/SB)SB2-x-z/SBSiOSB4/SB:CeSP3+/SPSBx/SB,M'SP+/SPSBz/SBwherein x represents 0x0.5, y represents 0y0.5, z represents 0z0.5, M represents one or more atoms selected from a group consisting of Mg, Sr and Ba, and M' represents one or more atoms selected from a group consisting of Li, Na, K and Rb. PCOPYRIGHT: (C)2009,JPO&INPIT