Energy transfer and multicolor tunable emission in single-phase Tb3+, Eu3+ co-doped Sr3La(PO4)3 phosphors |
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| Affiliation: | 1. Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, China;2. College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China;3. School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China;4. School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China;1. Department of Chemistry, Harbin Institute of Technology, Harbin 150001, PR China;2. Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150001, PR China;3. Department of Electrical and Computer Engineering, The George Washington University, Washington, DC 20052, USA;1. College of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha, 410004, PR China;2. School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, PR China |
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| Abstract: | A series of green-to-red color-tunable Sr3La(PO4)3:Tb3+, Eu3+ phosphors were prepared by high temperature solid-state method. The crystal structures, photoluminescence properties, fluorescence lifetimes, and energy transfer of Sr3La(PO4)3:Tb3+, Eu3+ were systematically investigated in detail. The obtained phosphors show both a green emission from Tb3+ and a red emission from Eu3+ with considerable intensity under ultraviolet (UV) excitation (~377 nm). The emission colors of the phosphors can be tuned from green (0.304, 0.589) through yellow (0.401, 0.505) and eventually to red (0.557, 0.392) due to efficient Tb3+-Eu3+ energy transfer (ET). The Tb3+→Eu3+ energy transfer process was demonstrated to be quadrupole-quadrupole mechanism by Inokuti-Hirayama model, with maximum ET efficiency of 86.3%. The results indicate that the Sr3La(PO4)3:Tb3+, Eu3+ phosphors might find potential applications in the field of lighting and displays. |
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| Keywords: | Phosphor Optical property Energy transfer Color-tunable |
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