Researching | Energy transfer between Ce3+ and Sm3+ in Zn2GeO4 phosphor with the native defects for light-emitting diodes

Journals >Chinese Optics Letters >Volume 15 >Issue 8 >Page 081601 > Article

Chinese Optics Letters
Vol. 15, Issue 8, 081601 (2017)

Energy transfer between Ce³⁺ and Sm³⁺ in Zn₂GeO₄ phosphor with the native defects for light-emitting diodes

Yushuang Qi¹, Lei Zhao², Wenjuan Bian¹, Xue Yu^1、3、*, Xuhui Xu^1、3, and Jianbei Qiu^1、3

Author Affiliations

¹College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China

²Department of Physics and Information Technology, Baoji University of Arts and Sciences, Baoji 721016, China

³Key Laboratory of Advanced Materials of Yunnan Province, Kunming 650093, China

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DOI: 10.3788/COL201715.081601 Cite this Article Set citation alerts

Yushuang Qi, Lei Zhao, Wenjuan Bian, Xue Yu, Xuhui Xu, Jianbei Qiu. Energy transfer between Ce³⁺ and Sm³⁺ in Zn₂GeO₄ phosphor with the native defects for light-emitting diodes[J]. Chinese Optics Letters, 2017, 15(8): 081601 Copy Citation Text

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(a) XRD patterns of Zn1.99GeO4:0.01Sm3+, Zn1.96GeO4:0.04Ce3+, Zn1.95GeO4:0.04Ce3+, 0.01Sm3+, and the JCPDS card of Zn2GeO4 (No.11-0687), (b) XPS of Zn1.96GeO4:0.04Ce3+, and the inset is the enlargement of the XPS spectrum from 860 to 900 eV.

Fig. 1. (a) XRD patterns of

{Zn}_{1.99} {GeO}_{4} : 0.01 {Sm}^{3 +}

,

{Zn}_{1.96} {GeO}_{4} : 0.04 {Ce}^{3 +}

,

{Zn}_{1.95} {GeO}_{4} : 0.04 {Ce}^{3 +}

,

0.01 {Sm}^{3 +}

, and the JCPDS card of

{Zn}_{2} {GeO}_{4}

(No.11-0687), (b) XPS of

{Zn}_{1.96} {GeO}_{4} : 0.04 {Ce}^{3 +}

, and the inset is the enlargement of the XPS spectrum from 860 to 900 eV.

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(a) PLE and PL spectra of Zn2GeO4, (b) Zn1.99GeO4:0.01Sm3+, (c) Zn1.96GeO4:0.04Ce3+, and (d) Zn1.95GeO4:0.04Ce3+, 0.01Sm3+ samples, respectively.

Fig. 2. (a) PLE and PL spectra of

{Zn}_{2} {GeO}_{4}

, (b)

{Zn}_{1.99} {GeO}_{4} : 0.01 {Sm}^{3 +}

, (c)

{Zn}_{1.96} {GeO}_{4} : 0.04 {Ce}^{3 +}

, and (d)

{Zn}_{1.95} {GeO}_{4} : 0.04 {Ce}^{3 +}

,

0.01 {Sm}^{3 +}

samples, respectively.

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Fig. 3. (Color online) PLE spectrum of

{Zn}_{1.99} {GeO}_{4} : 0.01 {Sm}^{3 +}

(black) and PL spectrum of

{Zn}_{1.96} {GeO}_{4} : 0.04 {Ce}^{3 +}

(red).

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Fig. 4. PL spectra of

{Zn}_{1.99 - x} {GeO}_{4} : {x Ce}^{3 +}

,

0.01 {Sm}^{3 +}

(

x = 0.00

, 0.01, 0.02, 0.03, 0.04, and 0.05) samples.

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Fig. 5. Decay curves of

{Zn}_{1.96 - y} {GeO}_{4} : 0.04 {Ce}^{3 +}

,

{y Sm}^{3 +}

(

y = 0.00

, 0.005, 0.03, and 0.07) monitored the 446 nm emission under 365 nm excitation.

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Fig. 6. CIE chromaticity diagram of

{Zn}_{1.96} {GeO}_{4} : 0.04 {Ce}^{3 +}

and

{Zn}_{1.93} {GeO}_{4} : 0.04 {Ce}^{3 +}

,

0.03 {Sm}^{3 +}

phosphors.

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Fig. 7. Dependence of

I_{s 0} / I_{s}

of

{Ce}^{3 +}

on

C^{6 / 3}

,

C^{8 / 3}

, and

C^{10 / 3}

.

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$τ_{1}$ (ns)	$A_{1}$	$τ_{2}$ (ns)	$A_{2}$
1.4559	1142.543	13.2079	11.988
1.2594	1178.256	13.1723	9.651
1.2763	1147.682	11.5937	8.7932
1.422	1243.268	11.2764	9.143

Table 1. Decay Kinetics for Zn1.96−yGeO4:0.04Ce3+, ySm3+ (y=0.00, 0.005, 0.03, and 0.07) Phosphors

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Yushuang Qi, Lei Zhao, Wenjuan Bian, Xue Yu, Xuhui Xu, Jianbei Qiu. Energy transfer between Ce³⁺ and Sm³⁺ in Zn₂GeO₄ phosphor with the native defects for light-emitting diodes[J]. Chinese Optics Letters, 2017, 15(8): 081601

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