Xie Huidong, Su Binbin, Tan Yurong, Zhao Yajuan, Chai Shouning
School of Science, Xi'an University of Architecture and Technology, Xi'an, P. R. China.
Luminescence. 2018 Dec;33(8):1450-1455. doi: 10.1002/bio.3556. Epub 2018 Oct 25.
Single phase of Bi , Gd , Sm and Eu co-doped La MgTiO red phosphors were synthesized by high temperature solid-state method. The phase composition, morphology and fluorescent properties of the phosphors were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and fluorescence spectrometer. The La MgTiO :xEu phosphors can be excited by UV (396 nm) and blue (465 nm) light-emitting diode (LED) chips and show a strong red emitting with dominated wavelength at 615 nm. The optimum doping concentration of Eu ion for La MgTiO is x = 0.5. The luminescent intensities of D → F transition of Eu in La MgTiO :0.5Eu , yBi /Gd /Sm were 1.31 times, 1.32 times and 1.88 times that of La MgTiO :0.5Eu at y = 0.08, 0.06, 0.06 for Bi , Gd , or Sm sensitizer, respectively. The chromaticity coordinates of La MgTiO :0.5Eu , 0.06Sm , (0.6342, 0.3513) were very close to those of the National Television Standard Committee (NTSC) standard red light coordinates.
采用高温固相法合成了Bi、Gd、Sm和Eu共掺杂的单相LaMgTiO红色荧光粉。通过X射线衍射（XRD）、扫描电子显微镜（SEM）和荧光光谱仪对荧光粉的相组成、形貌和荧光性能进行了分析。LaMgTiO:xEu荧光粉可被紫外（396nm）和蓝色（465nm）发光二极管（LED）芯片激发，并在615nm处呈现出以主峰波长为主的强红色发射。LaMgTiO中Eu离子的最佳掺杂浓度为x = 0.5。对于Bi、Gd或Sm敏化剂，当y = 0.08、0.06、0.06时，LaMgTiO:0.5Eu,yBi/Gd/Sm中Eu的D→F跃迁发光强度分别是LaMgTiO:0.5Eu的1.31倍、1.32倍和1.88倍。LaMgTiO:0.5Eu,0.06Sm的色度坐标（0.6342,0.3513）与国家电视标准委员会（NTSC）标准红光坐标非常接近。
