Sensitization of Sn<sup>2+</sup> on Tb<sup>3+</sup> luminescence for deep UV excitation in phosphate glasses

Lei Li; Yang Wang; Duojin Wang; Jian Qi; Fanshu Xia; Huidan Zeng; Guorong Chen

doi:10.3788/COL201614.071601

Chinese Optics Letters, Volume. 14, Issue 7, 071601(2016)

Sensitization of Sn²⁺ on Tb³⁺ luminescence for deep UV excitation in phosphate glasses

Lei Li, Yang Wang, Duojin Wang, Jian Qi, Fanshu Xia, Huidan Zeng, and Guorong Chen^*

Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

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Fig. 1. PLE spectra of G1-G3 monitored, respectively, at (a) 421/542 nm and at (b) 488 nm.

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Fig. 2. (a, b) PL spectra and (c) simplified energy level diagrams of Sn2+ and Tb3+.

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Fig. 3. Decay curves of G1-G3.

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Fig. 4. PL spectra of (a) G3-G6 and (b) G3, G7-G9, and (c) a CIE chromaticity diagram for G1-G3 and G9-G10 together with photos of luminescent samples.

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Table 1. Extra Tb, SnO Doping Concentrations (mol.%)
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Table 1. Extra Tb, SnO Doping Concentrations (mol.%)
Samples G1 G2 G3 G4 G5 G6 G7 G8 G9 G10
${Tb}^{3 +}$ 0.2 0.0 0.2 0.2 0.2 0.2 0.4 0.6 0.8 0.8
${Sn}^{2 +}$ 0.0 2.0 2.0 1.5 1.0 0.5 2.0 2.0 2.0 1.0

Table 2. Equivalent Decay Times of Sn2+ (421 nm) and Tb3+ (542 nm) Emissions for Samples G1-G9

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Table 2. Equivalent Decay Times of Sn2+ (421 nm) and Tb3+ (542 nm) Emissions for Samples G1-G9

	PL Decay Rate Measurements
Sample Code	$λ_{exc}$ (nm)	$λ_{em}$ (nm)	$τ$
G1	375	542	2.89 ms
G1	282	542	2.88 ms
G2	270	421	6.34 μs
G3	375	542	2.99 ms
	2823	542	2.94 ms
	270	421	6.32 μs
G4	282	542	3.05 ms
G5			2.96 ms
G6			3.01 ms
G7	270	421	6.32 μs
G8			6.39 μs
G9			6.33 μs

Table 3. CIE Chromaticity Coordinates of Emissions for Samples G1-G10

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Table 3. CIE Chromaticity Coordinates of Emissions for Samples G1-G10

	CIE Chromaticity Coordinates
Sample Codes	$λ_{exc} (nm)$	Coordinates
G1	375, 282	(0.261,0.443), (0.283, 0.395)
G2	270, 282	(0.180,0.173), (0.172, 0.144)
G3	282	(0.183, 0.182)
G4	282	(0.187, 0.191)
G5	282	(0.191, 0.202)
G6	282	(0.196, 0.217)
G7	282	(0.192, 0.215)
G8	282	(0.200, 0.241)
G9	282	(0.207, 0.265)
G10	282	(0.230, 0.339)

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Lei Li, Yang Wang, Duojin Wang, Jian Qi, Fanshu Xia, Huidan Zeng, Guorong Chen, "Sensitization of Sn²⁺ on Tb³⁺ luminescence for deep UV excitation in phosphate glasses," Chin. Opt. Lett. 14, 071601 (2016)

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