Synthesis And Luminescence Properties Of Non-rare Earth Ions Cr³⁺?Mn⁴⁺ Doped Red Phosphor Materials

The oxide red phosphor materials have stable chemical properties and excellent luminescence properties.It has a wide range of applications in the fields of semiconductor energy-saving lighting,computers,high-end displays,biomedical imaging diagnosis,nuclear physics and military.In terms of choosing,an activator for activating phosphor materials,the research and development of substitutes for precious rare earth ions has broad prospects,and the market potential of non-rare earth elements is huge.In this paper,we mainly study the synthesis and luminescence properties of red phosphors doped with non-rare earth Cr³⁺and Mn⁴⁺ions.Cr³⁺doped double perovskite structure Ca₂GaNbO₆ and Ca₂AlNbO₆ series oxide red phosphor and Mn⁴⁺doped inverse spinel structure(Mg_1-xA_x)2(Ti_1-xZr_x)O₄?A=Ca,Sr,Ba?series oxide red phosphors were synthesized,respectively.The relevant research content are as follows:1.First,a series of Cr³⁺-doped Ca₂GaNbO₆ and Ca₂AlNbO₆ phosphor materials were synthesized by high-temperature solid-phase reaction method,which absorb in the ultraviolet and visible range and emitted near-infrared light.The crystal structures and luminescent properties of all Cr³⁺-doped phosphors were analyzed.In addition,we analyzed the crystal structure of Ca₂GaNbO₆.The results show that both Ca₂GaNbO₆:Cr³⁺and Ca₂AlNbO₆:Cr³⁺phosphors materials exhibit 730-830nm near-infrared emission under UV-Vis excitation.The results show the Cr³⁺-doped Ca₂GaNbO₆ and Ca₂AlNbO₆ phosphors have potential value for application in near-infrared light-emitting devices.2.The Mn⁴⁺activated(Mg_1-xA_x)2(Ti_1-xZr_x)O₄?A=Ca,Sr,Ba?red narrow-band emission phosphors were obtained by introducing both Zr⁴⁺-A²⁺?A=Ca,Sr,Ba?cation pairs and activator ions into the matrix Mg₂TiO₄ with inverse spinel structure using high-temperature solid-state reaction.A serious of(Mg_1-xA_x)2(Ti_1-xZr_x)O4:Mn⁴⁺?A=Ca,Sr,Ba?red phosphors were characterized and analyzed by structure analysis,UV-Vis diffuse reflection spectra,excitation spectra,emission spectra,thermal stability and quantum efficiency,respectively.For the first time,the luminescent properties of(Mg_1-xA_x)2(Ti_1-xZr_x)O₄:Mn⁴⁺?A=Ca,Sr,Ba?were discussed,and the spectral peak positions at different wavelengths were assigned.In addition,the introduction of Zr⁴⁺-A²⁺?A=Ca,Sr,Ba?can regulate the position of the emission peak and make the emission peak emission red shift.(Mg_1-xA_x)₂(Ti_1-xZr_x)O₄:Mn⁴⁺?A=Ca,Sr,Ba?phosphor materials exhibit excellent red light emission with excellent purity under ultraviolet or blue light excitation,which is a potential red phosphor material for plant lighting LED.