Blue–green color-tunable emissions in novel transparent Sr2LuF7:Eu/Tb glass-ceramics for WLEDs

Xiaoman Li; Shaoshuai Zhou; Rongfei Wei; Xueyun Liu; Bingqiang Cao; Hai Guo

doi:10.3788/COL202018.051601

Journals >Chinese Optics Letters >Volume 18 >Issue 5 >Page 051601 > Article

Chinese Optics Letters
Vol. 18, Issue 5, 051601 (2020)

Blue–green color-tunable emissions in novel transparent Sr₂LuF₇:Eu/Tb glass-ceramics for WLEDs

Xiaoman Li^1、2、*, Shaoshuai Zhou¹, Rongfei Wei³, Xueyun Liu⁴, Bingqiang Cao^1、**, and Hai Guo³

Author Affiliations

¹School of Physics and Physical Engineering, Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Qufu Normal University, Qufu 273165, China

²State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China

³Department of Physics, Zhejiang Normal University, Jinhua 321004, China

⁴Laboratory of Infrared Materials and Devices, Advanced Technology Research Institute, Ningbo University, Ningbo 315211, China

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DOI: 10.3788/COL202018.051601 Cite this Article Set citation alerts

Xiaoman Li, Shaoshuai Zhou, Rongfei Wei, Xueyun Liu, Bingqiang Cao, Hai Guo. Blue–green color-tunable emissions in novel transparent Sr₂LuF₇:Eu/Tb glass-ceramics for WLEDs[J]. Chinese Optics Letters, 2020, 18(5): 051601 Copy Citation Text

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(a) XRD patterns of PGEuTb, GCEu, GCTb, and GCEuTb and the standard data for Sr2LuF7 (JCPDS No. 39-0926); (b) transmission spectra of PGEu, GCEu, PGTb, PGEuTb, and GCEuTb; (c) TEM and (d) HRTEM images of nano-structured GCEu. The inset is corresponding SAED patterns.

Fig. 1. (a) XRD patterns of PGEuTb, GCEu, GCTb, and GCEuTb and the standard data for

{Sr}_{2} {LuF}_{7}

(JCPDS No. 39-0926); (b) transmission spectra of PGEu, GCEu, PGTb, PGEuTb, and GCEuTb; (c) TEM and (d) HRTEM images of nano-structured GCEu. The inset is corresponding SAED patterns.

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(a) Excitation (λem=613 nm) and (b) emission (λex=393 nm) spectra of PGEu and GCEu.

Fig. 2. (a) Excitation (

λ_{em} = 613 nm

) and (b) emission (

λ_{ex} = 393 nm

) spectra of PGEu and GCEu.

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Fig. 3. (a) Emission spectra of PGEu and GCEu excited by 350 nm; normalized (b) emission and (c) excitation spectra of

{Eu}^{2 +}

ions in the GCEu sample.

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Fig. 4. (a) Excitation (

λ_{em} = 543 nm

) and (b) emission (

λ_{ex} = 377 nm

) spectra of

{Tb}^{3 +}

-doped samples (PGTb and GCTb).

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Fig. 5. (a) Emission spectra (

λ_{ex} = 350 nm

) and (b) decay lifetime of

{Eu}^{2 +}

ions (

λ_{ex} = 350 nm

λ_{em} = 427 nm

) of GCEu and GCEuTb samples.

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Fig. 6. CIE of GCEu (excited by 280, 300, 350, and 393 nm) and GCTb (excited by 377 nm).

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Fig. 7. Emission spectra excited by 350 nm of (a) PGEu and (b) GCEu under different temperatures from 300 to 500 K.

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Samples	Host	Eu	Tb
PGEu/GCEu	${SiO}_{2} - {Al}_{2} O_{3} - {SrF}_{2} - {LuF}_{3}$	$0 . {5 EuF}_{3}$	0
PGEuTb/GCEuTb	${SiO}_{2} - {Al}_{2} O_{3} - {SrF}_{2} - {LuF}_{3}$	$0.5 {EuF}_{3}$	$0.5 {TbF}_{3}$
PGTb/GCTb	${SiO}_{2} - {Al}_{2} O_{3} - {SrF}_{2} - {LuF}_{3}$	0	$0.5 {TbF}_{3}$