A promising red-emitting phosphor Li2Eu4(MoO4)(7) prepared by sol gel method

作者：Ru, Jingjing; Ying, Shaoming; Zheng, Wenxu; Chen, Jianzhong^*

来源：Materials Research Bulletin, 2016, 84: 468-473.

DOI：10.1016/j.materresbull.2016.08.030

• Inorganic compounds
• Sol-gel chemistry
• Luminescence
• X-ray diffraction
• Phosphors

A series of red light-emitting phosphors Li2Y4-x(MoO4)(7):xEu(3+) were synthesized by a sol-gel method. These samples were characterized by DSC-TGA, XRD, PL and FE-SEM analysis. The best dosage of citric acid is four times of metal ions. The optimal sintering temperature is 900 degrees C. The luminescence intensity of Li2Y4-x(MoO4)(7):xEu(3+) are strongest when the doping concentration of Eu3+ is 4 mol. These phosphors can be excitated by near-UV light of 395 nm and blue light of 465 nm effectively, and show strong red light at 615 nm, which is corresponding to D-5(0) -> F-7(2) transition of Eu3+ ion. The CIE chromaticity coordinates of Li2Eu4(MoO4)(7) phosphor is calculated to be (0.6497, 0.3499), and its lifetime is 0.38 ms. The results show that the phosphor is a promising red component candidate for near-UV and bule LED application.

• 出版日期2016-12
• 单位福州大学; 宁德师范学院