Abstract
A novel red phosphor Ba2Si4O10: Eu3+ was synthesized by the high-temperature solid state reaction method in air atmosphere. The crystal results reveal that Ba2Si4O10 has two different phases, in which the high-temperature phase belongs to monoclinic system and exhibits better photoluminescence property compared with low-temperature phase. The monoclinic Ba2Si4O10 was obtained at 1250°C and matched well with the JCPDS Card No. 83-1446. Photoluminescence excitation and emission spectra, fluorescence lifetime and quantum yield are conducted to investigate the luminescent property of Ba2Si4O10: Eu3+ phosphor. The results show that the phosphor can be excited by 393nm light (7F0→5L6) effectively and emit a strong red emission at 612nm (5D0→7F2). The optimal concentration of Eu3+ ions in Ba2Si4O10 matrix is 0.02, where the fluorescence lifetime was 1.0837 ms and the quantum yield was up to 31.64%. Additionally, the chromaticity coordinates of the optimal composition Ba1.98Si4O10: 0.02Eu3+ phosphor is calculated to be (0.65, 0.34). These results suggest that Ba2Si4O10: Eu3+ phosphor could be a potential red phosphor for practical application and optical devices.
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