Luminescence and energy transfer of white emitting phosphor Mg2Y2Al2Si2O12:Eu2+, Mn2+

With the development of modern lighting and display technology, the color tuneable phosphors have been widely investigated for their application. In order to achieve the color tuneable phosphors, series of Mg2Y2Al2Si2O12:Eu2+ and Mg2-xY1.99Al2Si2O12:xMn(2+), 0.01Eu(2+) are synthesized. In the host compound, Eu2+ does replace Y3+ non-equivalently, which affects the garnet structure of the samples, and then the internal environment of the crystal affects the energy level splitting of Eu2+, which causes the emission peak of Mg2Y2-yAl2Si2O12:yEu(2+) shifts from 425 nm to 495 nm. When codoped Mn2+/Eu2+, the emission color of Mg2-xY1.99Al2Si2O12:xMn(2+), 0.01Eu(2+) can turn from blue to white with increase Mn2+ concentration, and the color coordinates of Mg1.4Y1.99Al2Si2O12:0.6Mn(2+), 0.01Eu(2+) locate at (0.3254, 0.2669), and its color temperature is 5791.19 K. The results show that this phosphor may be a potential application to the white light emitting diodes.

Automated summary

A series of color tuneable phosphors were synthesized and their emission properties were investigated. It was found that co-doping Mn2+/Eu2+ could shift the emission color from blue to white, showing potential application in white light emitting diodes.