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Enhai Song,Weiren Zhao,Guoxiong Zhou,Xihua Dou,Huachu Ming,Chunyu Yi 한국물리학회 2011 Current Applied Physics Vol.11 No.6
A single phased white light emitting phosphors K_2Ca_(1−x−y)P_2O_7: xEu^2+, yMn^2+ were synthesized by solid state reaction method. The Effective energy transfer occurs in this phosphor due to the large spectral overlap between the emission of Eu^2+ and the excitation of Mn^2+. The emission hue of K_2Ca_(1−x−y)P_2O_7: xEu^2+, yMn^2+ from blue to white light can be obtained by tuning the Eu^2+/Mn^2+ content ratio. The energy transfer mechanism from Eu^2+ to Mn^2+ in this phosphor was carefully investigated and demonstrated to be via the dipole―quadrupole interaction.