Synthesis and photoluminescence properties of Sr4La(PO4)3O:RE3+(RE=Eu/Tb/Ce) phosphors

Ju Cheng; Jia Zhang; Hongchao Zhang; Sardar Maryam; Xintian Bian; Zhonghua Shen; Xiaowu Ni; Jian Lu

doi:doi:10.3788/COL201715.121602

Chinese Optics Letters, 2017, 15 (12): 121602, Published Online: Jul. 18, 2018

Synthesis and photoluminescence properties of Sr₄La(PO₄)₃O:RE³⁺(RE=Eu/Tb/Ce) phosphors

Ju Cheng ^1,2Jia Zhang ²Hongchao Zhang ¹Sardar Maryam ¹Xintian Bian ²Zhonghua Shen ¹Xiaowu Ni ¹Jian Lu ^1,*

Author Affiliations

¹ School of Science, Nanjing University of Science and Technology, Nanjing 210094, China

² School of Physics and Electronic Electrical Engineering, Huaiyin Normal University, Huai’an 223001, China

Figures & Tables

Fig. 1. XRD patterns of (a) SLPO:xEu3+ (x = 0–0.17), (b) SLPO:xTb3+ (x = 0–0.17), and (c) SLPO:xCe3+ (x = 0–0.17).

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Fig. 2. (Color online) PLE (λem= 611 nm) and emission (PL, λex= 394 nm) spectra of SLPO:0.05Eu3+ phosphor.

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Fig. 3. (Color online) (a) Emission spectra of SLPO:xEu3+ (x = 0.01, 0.05, 0.07, 0.12, and 0.17) at room temperature; (b) the relationships of log(xEu3+) versus log(I/xEu3+); inset: PL intensity of SLPO:xEu3+ as a function of Eu3+ concentration.

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Fig. 4. (Color online) PLE (λem= 539 nm) and emission (PL, λex= 379 nm) spectra of SLPO:0.07Tb3+ phosphor.

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Fig. 5. (Color online) (a) Emission spectra of SLPO:xTb3+ (x = 0.01, 0.05, 0.07, 0.12, and 0.17) at room temperature; (b) the relationships of log(xTb3+) versus log(I/xTb3+), inset: PL intensity of SLPO:xTb3+ as a function of Tb3+ concentration.

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Fig. 6. (Color online) (a) PLE (λem= 482 nm) and PL (λex= 337 nm) spectra of SLPO:0.12Ce3+ phosphor; (b) the PL (λex= 337 nm) spectra of SLPO:xCe3+ (x = 0.01, 0.05, 0.07, 0.12, and 0.17) at room temperature. Inset (up left): Cell volumes of SLPO: xCe3+ (0.01 ≤ x ≤ 0.17) as function of Ce3+ concentration. Inset (up right): the relationship between the emission peak with the intensity and the Ce3+ concentration in SLPO:xCe3+.

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Fig. 7. (Color online) Normalized (a) PL and (b) PLE spectra of SLPO: 0.01Ce3+ excited and monitored at different wavelengths.

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Fig. 8. (Color online) PL spectra of (a) SLPO:0.05Eu3+ (λex= 394 nm) and (b) SLPO:0.07Tb3+ (λex= 379 nm) at different temperatures, inset: the temperature dependence of the integrated emission intensity; (c) the PL spectra of SLPO:0.12Ce3+ at different temperatures (λex= 337 nm); (d) the activation plot for thermal quenching of SLPO:0.12Ce3+, inset: temperature dependence of the integrated emission intensity.

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Fig. 9. SEM images of (a) SLPO:0.05 Eu3+; (b) SLPO:0.07Tb3+ and (c) SLPO:0.12Ce3+ phosphors.

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Fig. 10. CIE chromaticity diagram for SLPO:0.05Eu3+ (Point 1), SLPO:0.07Tb3+ (Point 2) and SLPO:0.12Ce3+ excited under different wavelengths (Points 3–7); insets: the corresponding digital photographs of (a) SLPO:0.05Eu3+ and (b) SLPO:0.07Tb3+ under 254 nm ultraviolet lamp irradiation; and (c) SLPO:0.12Ce3+ under 365 nm ultraviolet lamp irradiation.

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Table1. CIE Coordinates, Peak Emission Wavelength of PL Spectra for Eu3+, Tb3+, and Ce3+-Doped SLPO Samples

Sample	$λ_{ex} / nm$	$λ_{em - peak} / nm$	CIE (x,y)
$SLPO : 0.05 {Eu}^{3 +}$	394	611	(0.6405, 0.3591)
$SLPO : 0.07 {Tb}^{3 +}$	379	539	(0.3381, 0.4445)
$SLPO : 0.12 {Ce}^{3 +}$	312	469	(0.2316, 0.2769)
$SLPO : 0.12 {Ce}^{3 +}$	337	482	(0.2328, 0.3014)
$SLPO : 0.12 {Ce}^{3 +}$	352	498	(0.259, 0.3663)
$SLPO : 0.12 {Ce}^{3 +}$	362	505	(0.2733, 0.3951)
$SLPO : 0.12 {Ce}^{3 +}$	372	540	(0.2925, 0.4004)

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Ju Cheng, Jia Zhang, Hongchao Zhang, Sardar Maryam, Xintian Bian, Zhonghua Shen, Xiaowu Ni, Jian Lu. Synthesis and photoluminescence properties of Sr₄La(PO₄)₃O:RE³⁺(RE=Eu/Tb/Ce) phosphors[J]. Chinese Optics Letters, 2017, 15(12): 121602.

Synthesis and photoluminescence properties of Sr₄La(PO₄)₃O:RE³⁺(RE=Eu/Tb/Ce) phosphors

Fig. 1. XRD patterns of (a) SLPO:xEu3+ (x = 0–0.17), (b) SLPO:xTb3+ (x = 0–0.17), and (c) SLPO:xCe3+ (x = 0–0.17).

Fig. 2. (Color online) PLE (λem= 611 nm) and emission (PL, λex= 394 nm) spectra of SLPO:0.05Eu3+ phosphor.

Fig. 3. (Color online) (a) Emission spectra of SLPO:xEu3+ (x = 0.01, 0.05, 0.07, 0.12, and 0.17) at room temperature; (b) the relationships of log(xEu3+) versus log(I/xEu3+); inset: PL intensity of SLPO:xEu3+ as a function of Eu3+ concentration.

Fig. 4. (Color online) PLE (λem= 539 nm) and emission (PL, λex= 379 nm) spectra of SLPO:0.07Tb3+ phosphor.

Fig. 5. (Color online) (a) Emission spectra of SLPO:xTb3+ (x = 0.01, 0.05, 0.07, 0.12, and 0.17) at room temperature; (b) the relationships of log(xTb3+) versus log(I/xTb3+), inset: PL intensity of SLPO:xTb3+ as a function of Tb3+ concentration.

Fig. 7. (Color online) Normalized (a) PL and (b) PLE spectra of SLPO: 0.01Ce3+ excited and monitored at different wavelengths.

Fig. 9. SEM images of (a) SLPO:0.05 Eu3+; (b) SLPO:0.07Tb3+ and (c) SLPO:0.12Ce3+ phosphors.

Table1. CIE Coordinates, Peak Emission Wavelength of PL Spectra for Eu3+, Tb3+, and Ce3+-Doped SLPO Samples

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Synthesis and photoluminescence properties of Sr4La(PO4)3O:RE3+(RE=Eu/Tb/Ce) phosphors

Fig. 1. XRD patterns of (a) SLPO:xEu3+ (x = 0–0.17), (b) SLPO:xTb3+ (x = 0–0.17), and (c) SLPO:xCe3+ (x = 0–0.17).

Fig. 2. (Color online) PLE (λem= 611 nm) and emission (PL, λex= 394 nm) spectra of SLPO:0.05Eu3+ phosphor.

Fig. 3. (Color online) (a) Emission spectra of SLPO:xEu3+ (x = 0.01, 0.05, 0.07, 0.12, and 0.17) at room temperature; (b) the relationships of log(xEu3+) versus log(I/xEu3+); inset: PL intensity of SLPO:xEu3+ as a function of Eu3+ concentration.

Fig. 4. (Color online) PLE (λem= 539 nm) and emission (PL, λex= 379 nm) spectra of SLPO:0.07Tb3+ phosphor.

Fig. 5. (Color online) (a) Emission spectra of SLPO:xTb3+ (x = 0.01, 0.05, 0.07, 0.12, and 0.17) at room temperature; (b) the relationships of log(xTb3+) versus log(I/xTb3+), inset: PL intensity of SLPO:xTb3+ as a function of Tb3+ concentration.

Fig. 7. (Color online) Normalized (a) PL and (b) PLE spectra of SLPO: 0.01Ce3+ excited and monitored at different wavelengths.

Fig. 9. SEM images of (a) SLPO:0.05 Eu3+; (b) SLPO:0.07Tb3+ and (c) SLPO:0.12Ce3+ phosphors.

Table1. CIE Coordinates, Peak Emission Wavelength of PL Spectra for Eu3+, Tb3+, and Ce3+-Doped SLPO Samples

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Synthesis and photoluminescence properties of Sr₄La(PO₄)₃O:RE³⁺(RE=Eu/Tb/Ce) phosphors