Synthesis and Photoluminescence of Novel Ca1-xMgP2O7:xEu3+ Pyrophosphate Phosphor for Near Ultraviolet Light Emitting Diodes

We studied the microstructure and photoluminescence properties of Ca1-xMgP2O7:xEu(3+) (0.01 <= x <= 0.2) phosphors, considering Eu3+ content. The Ca1-xMgP2O7:xEu(3+) phosphors crystallized in the monoclinic structure, belonging to the space group of P2(1)/n. The Ca1-xMgP2O7:xEu(3+) phosphors showed a nanocrystalline nature. In the FT-IR and Raman spectra, the stretching vibrations of PO3 and P-O-P groups in (P2O7)(4-) were observed. The amount of Eu3+ content significantly affected the magnitude of the excitation and emission intensities. The excitation intensity at 393 nm and the emission intensity at 605-628 nm were increased with an increase in Eu3+ content up to x = 0.1 and then decreased with further increasing Eu3+ content. The strong emission intensity under near ultraviolet excitation makes it possible red phosphor for generating white light based on LEDs.