摘要
Blue-violet light can not only enhance the total content of biomass and glucoside but also enrich the taste of the fruit.Thus,it is meaningful to study the blue-violet luminescent materials for plant cultivation.In this study,titanium(IV)-activated CaYAlO4(CYAO) phosphors were synthesized by conventional hightemperature solid-state reaction.X-ray powder diffraction was employed to analyze the crystalstructure of CYAO.It is found that the doped Ti^4+ ions do not change obviously the crystal structure of phosphors.Upon 246 nm excitation,CaYAl1-xO4:xTi^4+phosphors exhibit broad blue-violet emission band peaking at 395 nm,which can be attributed to the charge transfer of Ti^4+-O^2-.Moreover,this phosphor exhibits strong thermal stability.The luminescence emission intensity at 150℃maintained about 91 mol% of its initial value at room temperature.Additionally,the electron transition process and concentration quenching mechanism of CaYAl1-xO4:xTi^4+are discussed in detail.The excellent luminescent properties indicate that CaYAl1-xO4:xTi^4+phosphor may have promising application in indoor plant cultivation.
Blue-violet light can not only enhance the total content of biomass and glucoside but also enrich the taste of the fruit.Thus,it is meaningful to study the blue-violet luminescent materials for plant cultivation.In this study,titanium（IV）-activated CaYAlO4（CYAO） phosphors were synthesized by conventional hightemperature solid-state reaction.X-ray powder diffraction was employed to analyze the crystalstructure of CYAO.It is found that the doped Ti4+ ions do not change obviously the crystal structure of phosphors.Upon 246 nm excitation,CaYAl1-xO4:xTi4+phosphors exhibit broad blue-violet emission band peaking at 395 nm,which can be attributed to the charge transfer of Ti4+-O2-.Moreover,this phosphor exhibits strong thermal stability.The luminescence emission intensity at 150℃maintained about 91 mol% of its initial value at room temperature.Additionally,the electron transition process and concentration quenching mechanism of CaYAl1-xO4:xTi4+are discussed in detail.The excellent luminescent properties indicate that CaYAl1-xO4:xTi4+phosphor may have promising application in indoor plant cultivation.
基金
supported by the National Natural Science Foundation of China(21706060,51703061)
Natural Science Foundation of Hunan Province(2017JJ3103)
Youth Project of Hunan Education Department(17B1118)
Hunan Provincial Engineering Technology Research Center for Optical Agriculture(2018TP2003).
