发光
荧光粉
材料科学
兴奋剂
杂质
煅烧
激活剂(遗传学)
分析化学(期刊)
激发态
光电子学
化学
原子物理学
物理
有机化学
催化作用
基因
生物化学
色谱法
作者
Yuxiao Yang,Zicheng Lu,Yiheng Liu,Chen Wang,Bing Yan,Yongqian Wang
标识
DOI:10.1142/s1793604721510358
摘要
In this paper, safer raw materials were used to synthesize SrLiA1 3 N 4 :Eu[Formula: see text] phosphors under high purity nitrogen gas by high-temperature solid-state method, and the effects of activator doping concentration, calcination temperature, calcination time and matrix lattice cation substitution on their luminescence performance were studied. All the samples can emit red light effectively excited by ultraviolet or blue light, and the narrow-band red emission peak is at [Formula: see text]651 nm. Energy Dispersive Spectroscopy (EDS) results show that the Eu[Formula: see text] element has been successfully doped and uniformly distributed. The X-ray powder diffraction (XRD) pattern showed that impurities of AlN and SrO were present in the synthesized samples, and the impurity phase was significantly reduced or eliminated with the increase of calcination temperature. The relationship between luminescence intensity of phosphor and Eu[Formula: see text] doping concentration indicates that with the increase of Eu[Formula: see text] doping concentration, the luminescence intensity of powder first increases and then decreases, and the optimal doping concentration is 0.02. Concentration quenching will occur if the doping amount of Eu[Formula: see text] continues to increase. The addition of Ca makes it replace Sr in the crystal lattice, resulting in the reduction of field force in the lattice expansion crystal, resulting in the reduction of luminescence intensity, the red shift of emission peak, and the increase of half height and width. The results exhibit that SrLiAl 3 N 4 :Eu[Formula: see text] may be a more suitable phosphor than CaLiAl 3 N 4 :Eu[Formula: see text] as a narrow-band red component in white LEDs.
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