Objective:The preparation and luminescence performance of a new type of fluorescent powder for plant fill lighting were investigated.Methods:Red Sr3LiSbO6∶Mn4+,Eu3+phosphors were prepared by high temperature solid phase method,and XRD,SEM,luminescence properties,thermal stability,lifetime decay and color coordinates were analyzed.Results:The prepared phosphors with various doped concentrations could be excited by 305 nm ultraviolet light,where Sr3LiSbO6:0.2％Mn4+,14％Eu3+had optimal luminous intensity.It showed strong red radiation at 698 nm.The concentration quenching effect of the sample was studied,and the quenching was attributed to the dipole-dipole(d-d)interaction.In addition,the thermal stability of the sample was also investigated,the emission intensity at 155 ℃ maintained 64.5％compared with its initial value at room temperature.At the same time,the fluorescence lifetime and CIE of the sample were analyzed systematically,which showed that the LED packaged with optimal phosphor presented strong red fluorescent radiation.Conclusion:The prepared Sr3LiSbO6∶Mn4+,Eu3+phosphor was a new type of LED red fluorescent material.The comparison between the fluorescence emission spectrum and the spectra of plant phytochromes Pfr and Pr indicated that the LED packaged with this fluorescent powder had good potential for application in plant lighting.
关键词
Sr3LiSbO6∶Mn4+,Eu3+共掺杂/植物补光灯/荧光粉/高温固相法/LED
Key words
Sr3LiSbO6∶Mn4+,Eu3+co-doped/Plant fill light/Phosphor/High temperature solid phase method/LED
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