Synthesis and Photoluminescence Properties of a Potential Red-Emitting Phosphor Sr2-xNb2O7: Xeu3+ for White LEDs

A series of phosphors Eu3+-activated Sr2Nb2O7 red emitting phosphors were synthesized using a solid-state method in high temperature air. The X-ray diffraction (XRD) pattern showed that the single phase was obtained and the particles illustrated a narrow size distribution of about 0.75 mu m. The excitation and emission spectrum show that the phosphor can be excited under the light of 393 nm or 465 nm to emit strong red light of 615 nm. The CIE coordinates (x = 0.65, y = 0.37) of the representative red phosphor are close to pure red. The luminescence properties suggest the phosphor is a potential red emitting phosphor.