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Luminescence properties and energy transfer of La3Ga5SiO14:Eu3+, Tb3+ phosphors.
- Source :
- CrystEngComm; 6/21/2021, Vol. 23 Issue 23, p4194-4204, 11p
- Publication Year :
- 2021
-
Abstract
- In this paper, a series of Eu<superscript>3+</superscript>/Tb<superscript>3+</superscript> doped La<subscript>3</subscript>Ga<subscript>5</subscript>SiO<subscript>14</subscript> (LGS:Eu<superscript>3+</superscript>, Tb<superscript>3+</superscript>) phosphors with excellent performance have been synthesized by high-temperature solid-phase method. The effects of Eu<superscript>3+</superscript> and Tb<superscript>3+</superscript> doping in LGS on the host lattice were analyzed by X-ray diffraction (XRD). X-ray photoelectron spectroscopy (XPS) proved that the Eu<superscript>3+</superscript> and Tb<superscript>3+</superscript> ions were successfully doped into the LGS host. The doped Eu<superscript>3+</superscript>/Tb<superscript>3+</superscript> ions only occupy the eight-coordinated La<superscript>3+</superscript> sites. The concentration quenching points of LGS:Eu<superscript>3+</superscript> and LGS:Tb<superscript>3+</superscript> phosphors were determined to be 0.16 and 0.18, respectively. The luminescence performance and fluorescence lifetime of LGS:Eu<superscript>3+</superscript>, Tb<superscript>3+</superscript> were studied. LGS:Eu<superscript>3+</superscript>, Tb<superscript>3+</superscript> phosphors successfully realized Tb<superscript>3+</superscript> → Eu<superscript>3+</superscript> energy transfer to enhance Eu<superscript>3+</superscript> luminescence. The energy transfer mechanism is speculated on using the experimental results. The energy transfer efficiency from Tb<superscript>3+</superscript> to Eu<superscript>3+</superscript> is about 66.83% in La<subscript>2.46</subscript>Tb<subscript>0.18</subscript>Eu<subscript>0.36</subscript>Ga<subscript>5</subscript>SiO<subscript>14</subscript>. The LGS:Eu<superscript>3+</superscript>, Tb<superscript>3+</superscript> phosphors can achieve tunable luminescence by controlling the doping concentrations of Eu<superscript>3+</superscript> and Tb<superscript>3+</superscript>. The ΔE is calculated to be 0.2567 eV for the La<subscript>2.70</subscript>Eu<subscript>0.12</subscript>Tb<subscript>0.18</subscript>Ga<subscript>5</subscript>SiO<subscript>14</subscript> phosphor. [ABSTRACT FROM AUTHOR]
- Subjects :
- TERBIUM
ENERGY transfer
LUMINESCENCE
PHOSPHORS
X-ray photoelectron spectroscopy
Subjects
Details
- Language :
- English
- ISSN :
- 14668033
- Volume :
- 23
- Issue :
- 23
- Database :
- Complementary Index
- Journal :
- CrystEngComm
- Publication Type :
- Academic Journal
- Accession number :
- 150911402
- Full Text :
- https://doi.org/10.1039/d1ce00487e