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采用高温固相反应合成MZn PO4:RE(M=Li,Na,K;RE=Eu3+,La3+,Ce3+),用X射线衍射(XRD)、扫描电镜(SEM)和能谱分析(EDS)等方法对产物进行了表征,并对产物的发光性能进行研究。结果表明:掺杂三价稀土离子Eu3+,La3+,Ce3+没有改变MZn PO4(M=Li,Na,K)的晶体结构和颗粒形貌;在紫外光(260 nm)激发下,Eu3+掺杂的MZn PO4:Eu3+(M=Li,Na,K)改变了MZn PO4(M=Li,Na,K)原有的发光波长,发射橙红色光,主峰位于595 nm附近,为Eu3+的5D0→7F1跃迁发射;La3+,Ce3+掺杂的MZn PO4:RE(M=Li,Na,K,RE=La3+,Ce3+)则发射蓝色光,最高峰对应波长为400~500 nm,没有改变MZn PO4(M=Li,Na,K)的发光波长,但提高了强度,La3+掺杂的强度大于Ce3+掺杂;除了基质本身对发光的贡献外,Ce3+有很弱的5d1→4f1的跃迁发射,而非荧光稀土离子La3+作为添加剂可提高基质材料的荧光性能。
The MZn PO4: RE (M = Li, Na, K; RE = Eu3 +, La3 +, Ce3 +) was synthesized by high temperature solid-state reaction and characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy (EDS) The product was characterized and the luminescent properties of the product were studied. The results show that the crystal structure and particle morphology of MZn PO4 (M = Li, Na, K) are not changed by Eu3 +, La3 + and Ce3 + doping. The Eu3 + doped MZn The original emission wavelength of MZn PO4 (M = Li, Na, K) is changed by PO4: Eu3 + (M = Li, Na, K) and emits orange-red light with the main peak located near 595 nm, which is the 5D0 → 7F1 transition emission of Eu3 + (M = Li, Na, K, RE = La3 +, Ce3 +) doped with La3 + and Ce3 + emits blue light with the corresponding peak wavelength of 400-500 nm without changing MZn PO4 (M = Li, Na, K), but increased the intensity. The intensity of La3 + doping is greater than that of Ce3 + doping. In addition to the contribution of the matrix itself to luminescence, Ce3 + has a weak 5d1 → 4f1 transition emission, while the non-fluorescent rare earth ions La3 + As an additive to improve the fluorescence properties of the matrix material.