Abstract
A novel red-emitting phosphor Ba1.95ZnSi2O7:Eu0.053+, Bx3+ was prepared by combustion synthesis and an efficient red emission under near-ultraviolet (UV) was observed. The luminescence, crystallinity, and particle sizes were investigated using luminescence spectrometry, X-ray diffractometry, and scanning electron microscopy. The emission spectrum shows that the most intense peak is located at 614 nm, which corresponds to the 5D0→7F2 transition of Eu3+. The phosphor has two main excitation peaks located at 394 and 465 nm, which match the emission of UV and blue light-emitting diodes, respectively. The optical absorption spectra of Ba1.95 ZnSi2O7:Eu0.053+, B0.063+ exhibited a band-gap energy of 3.95 eV. The results showed that boric acid was effective in improving the luminescence intensity of Ba1.95ZnSi2O7:Eu0.053+, and the optimum molar ratio of boric acid to zinc nitrate was about 0.06. The phosphor Ba1.95ZnSi2O7:Eu0.053+, B0.063+ synthesized by the combustion method showed 1.8 times improved emission intensity compared with that of the Ba1.95ZnSi2O7:Eu0.053+ phosphor under λex=394 nm.
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