Warm white emission of LaSr2F7:Dy3+/Eu3+ NPs with excellent thermal stability for indoor illumination

doi:10.1016/j.jmst.2020.02.066

Abstract

Abstract:

The novel single Dy³⁺-activated and Dy³⁺/Eu³⁺ co-activated LaSr₂F₇ NPs-based phosphors were successfully synthesized via a simple precipitation reaction method at room temperature. The phase formations and cell parameters of single Dy³⁺-activated and Dy³⁺/Eu³⁺ co-activated LaSr₂F₇ NPs were verified in detail by the Rietveld refinement technique based on the recorded X-ray diffraction patterns. The doping concentration of single Dy³⁺-activated LaSr₂F₇ NPs was optimized to be 0.1 mol with the concentration quenching dominated by the electric dipole-dipole interaction. Meanwhile, a variety of Eu³⁺-activated La_0.9Sr₂F₇:0.1Dy³⁺ NPs exhibited tunable luminescent properties and emitted warm white light in close to standard warm white light under 363 nm excitation. The valid energy transfer (ET) efficiency from Dy³⁺ to Eu³⁺ ions was estimated to be about 86.02% based on the emission intensity while the electric dipole-quadrupole interaction dominated the concentration quenching mechanism in ET process. Eventually, the thermal quenching of the obtained samples was studied, showing the excellent thermal stability. All the results manifest that Eu³⁺-activated LaSr₂F₇:Dy³⁺ NPs could emit warm white light with excellent thermal stability for indoor illumination.

Key words: Warm white light, Energy transfer, Thermal stability, Chromaticity coordinates

Yongbin Hua, Jae Su Yu. Warm white emission of LaSr₂F₇:Dy³⁺/Eu³⁺ NPs with excellent thermal stability for indoor illumination[J]. J. Mater. Sci. Technol., 2020, 54: 230-239.

Figures/Tables 9

Fig. 1. (a) XRD patterns of the La0.9Sr2F7:0.1Dy3+ and La0.89Sr2F7:0.1Dy3+/0.01Eu3+ NPs. (b) Crystal structure of the LaSr2F7 host material. (c, d) Rietveld refinement results of the XRD patterns.

Fig. 2. SEM images of (a-c) La1-xSr2F7:xDy3+ (x = 0.01, 0.1 and 0.25 mol) and (d-f) La0.9-ySr2F7:0.1Dy3+/yEu3+ (y = 0.01, 0.1 and 0.3 mol) NPs.

Fig. 3. Elemental mapping images and EDS spectra of the (a, b) La0.9Sr2F7:0.1Dy3+ and (c, d) La0.8Sr2F7:0.1Dy3+/0.1Eu3+ NPs.

Fig. 4. (a) PLE and (b) PL emission spectra of La1-xSr2F7:xDy3+ NPs as a function of Dy3+ ion concentration. (c) Dependence of PL emission intensity on Dy3+ ion concentration. (d) Plot of log(x) vs. log (I/x). (e) Typical PL emission spectrum of the La0.9Sr2F7:0.1Dy3+ NPs and (f) CIE chromaticity coordinate.

Fig. 5. (a) PL emission spectra of the La0.9Sr2F7:0.1Dy3+ NPs excited at 349 nm for various temperatures (303-483 K). (b) Normalized PL intensity dependence of the dominated peak on temperature. (c) Plot of ln(I0/I-1) vs. 1/(kT) for the La1-xSr2F7:xDy3+ NPs.

Fig. 6. (a) PLE spectra of the La0.89Sr2F7:0.1Dy3+/0.01Eu3+ NPs under the emission wavelengths of 573 and 592 nm. (b) PL emission spectra of La0.9-ySr2F7:0.1Dy3+/yEu3+ NPs measured under 363 nm of excitation wavelength. (c) PL emission intensity dependence of Dy3+ (573 nm) and Eu3+ (595 nm) ions on Eu3+ ion concentration. (d) Energy transfer efficiency as a function of Eu3+ ion concentration. (e) PL decay curves of the La0.9-ySr2F7:0.1Dy3+/yEu3+ (y = 0, 0.01, 0.05, 0.1, 0.15, 0.2 and 0.3 mol) NPs under 363 nm of excitation wavelength and 573 nm of emission wavelength. (f) Lifetime values as a function of Eu3+ ion concentration.

Fig. 7. (a-c) Plots of Is0/Is vs. Cn/3 (n = 6, 8 and 10). (d) Simplified ET process from Dy3+ to Eu3+ ions in La0.9-ySr2F7:0.1Dy3+/yEu3+ NPs.

Fig. 8. (a) PL emission spectra of the La0.8Sr2F7:0.1Dy3+/0.1Eu3+ NPs at 363 nm of excitation wavelength for various temperatures. (b) PL emission intensity of the dominated peaks of Dy3+ (573 nm) and Eu3+ (592 nm) ions as a function of temperature. Plot of ln(I0/I-1) vs. 1/(kT) of (c) Dy3+ (573 nm) and (d) Eu3+ (592 nm) ions.

Fig. 9. CIE chromaticity coordinates (x, y) of La0.9-ySr2F7:0.1Dy3+/yEu3+ NPs under 363 nm of excitation and corresponding photographs under NUV light irradiation.

References 43

[1]	Q. Zhang, X. Wang, X. Ding, Y. Wang, Inorg. Chem. 56 (2017) 6990-6998. URL PMID
[2]	P. Du, Y. Hua, J.S. Yu, Chem. Eng. J. 352 (2018) 352-359.
[3]	Y. Hua, J.S. Yu, J. Alloys. Compd. 783 (2019) 969-976. DOI URL
[4]	Y. Hua, S.K. Hussain, J.S. Yu, New J. Chem. 43 (2019) 10645-10657.
[5]	J. Yan, Z. Zhang, D. Wen, J. Zhou, Y. Xu, J. Li, C. Ma, J. Shi, M. Wu, J. Mater. Chem. C 7 (2019) 8374-8382.
[6]	P. Kumar, J. Dwivedi, B.K. Gupta, J. Mater. Chem. C 2 (2014) 10468-10475.
[7]	L. Zhang, S. Lyu, Q. Zhang, Y. Wu, C. Melcher, S. Chmely, Z. Chen, S. Wang, Carbohydr. Polym. 206 (2019) 767-777. URL PMID
[8]	D. Navami, R.B. Basavaraj, S.C. Sharma, B.D. Prasad, H. Nagabhusshana, J. Alloys. Compd. 762 (2018) 763-779.
[9]	Y. Hua, S.K. Hussain, J.S. Yu, Ceram. Int. 45 (2019) 18604-18613.
[10]	S. Zhou, H. Wang, L. Zhong, J. Zhao, L. Li, G. Li, J. Mater. Sci. Technol. 34 (2018) 949-954.
[11]	Z. Zhang, Y. Zhang, C. Wang, Z. Feng, W. Zhang, H. Xia, J. Mater. Sci. Technol. 33 (2017) 432-437.
[12]	Y. Jiang, H. Xia, J. Zhang, S. Yang, H. Jiang, B. Chen, J. Mater. Sci. Technol. 31 (2015) 1232-1236.
[13]	W. Sun, H. Li, B. Zheng, R. Pang, L. Jiang, S. Zhang, C. Li, J. Alloys. Compd. 774 (2019) 477-486.
[14]	J. Liang, B. Devakumar, L. Sun, G. Annadurai, S. Wang, Q. Sun, X. Huang, Huang,J. Lumin.. 214 (2019), 116605.
[15]	B. Li, J. Liang, L. Sun, S. Wang, Q. Sun, B. Devakumar, G. Annadurai, D. Chen, X. Huang, Y. Wu, J. Lumin. 211 (2019) 388-393.
[16]	Z. Wang, B. Shen, K. Yu, Z. Yang, R. Zheng, E. Hu, J. Zheng, W. Wei, J. Alloys. Compd. 791 (2019) 833-838.
[17]	M. Song, W. Zhao, W. Ran, J. Xue, Y. Liu, J.H. Jeong, J. Alloys. Compd. 803 (2019) 1063-1074.
[18]	Y. Yang, Y. Zhou, D. Pan, Z. Zhang, J. Zhao, J. Lumin. 206 (2019) 578-584.
[19]	K. Ikeda, H. Yamashina, A. Ichihashi, Light. Res. Technol. 28 (1996) 97-112.
[20]	H. Xia, L. Lei, W. Hong, S. Xu, J. Alloys. Compd. 757 (2018) 239-245.
[21]	Y. Yan, Y. Tan, D. Li, F. Luan, D. Guo, J. Lumin. 211 (2019) 209-217.
[22]	Y. Zhang, B. Chen, S. Xu, X. Li, J. Zhang, J. Sun, X. Zhang, H. Xia, R. Hua, Phys. Chem. Chem. Phys. 20 (2018) 15876-15883.
[23]	F.T. Rabouw, P.T. Prins, P. Villanueva-Delgado, M. Castelijins, R.G. Geitenbeek, A. Meijerink, ACS Nano 12 (2018) 4812-4823. DOI URL PMID
[24]	P. Du, J.S. Yu, Sci. Rep. 7 (2017) 11953. URL PMID
[25]	Q. Cheng, F. Ren, Q. Lin, H. Tong, X. Miao, J. Alloys. Compd. 772 (2019) 905-911.
[26]	L. Yang, X. Mi, H. Zhang, X. Zhang, Z. Bai, J. Lin, J. Alloys. Compd. 787 (2019) 815-822.
[27]	K. Li, H. Lian, R.V. Deun, M.G. Brik, Dye. Pigment. 162 (2019) 214-221.
[28]	M. Jayachandiran, S.M.M. Kennedy, J. Alloys. Compd. 775 (2019) 353-359.
[29]	S.S.B. Nasir, A. Tanaka, S. Yoshiara, A. Kato, J. Lumin. 207 (2019) 22-28.
[30]	L. Shi, Y. Han, Y. Zhao, M. Li, X. Geng, Z. Zhang, L. Wang, Opt. Mater. 89 (2019) 609-614.
[31]	S.H. Lee, Y. Cha, H. Kim, S. Lee, J.S. Yu, RSC Adv. 8 (2018) 11207-11215.
[32]	S. Wang, Q. Sun, B. Devakumar, J. Liang, L. Sun, X. Huang, J. Alloys. Compd. 804 (2019) 93-99.
[33]	Q. Bao, Z. Wang, Q. Feng, Z. Wang, X. Meng, K. Qiu, Y. Chen, J. Sun, Z. Yang, P. Li, J. Lumin. 213 (2019) 164-173.
[34]	Q. Dong, J. Cui, Y. Tian, F. Ynag, H. Ming, F. Du, J. Peng, X. Ye, J. Lumin. 212 (2019) 146-153.
[35]	X. Wu, J. Zheng, Q. Ren, J. Zhu, Y. Ren, O. Hai, J. Alloys. Compd. 805 (2019) 12-18. DOI URL
[36]	S. Zhang, H. Luo, Z. Mu, J. Li, S. Guo, Z. Li, Q. Wang, F. Wu, J. Alloys. Compd. 757 (2018) 423-433. DOI URL
[37]	M. Liao, Z. Mu, S. Zhang, F. Wu, Z. Nie, Z. Zheng, X. Feng, Q. Zhang, J. Feng, D. Zhu, J. Lumin. 210 (2019) 202-209. DOI URL
[38]	B. liu, J. Li, G. Duan, Q. Li, Z. Liu, J. Lumin. 206 (2019) 348-358. DOI URL
[39]	P.V. Do, V.X. Quang, L.D. Thanh, V.P. Tuyen, N. Xuan, V.X. Ca, H.V. Hoa, Tuyen, Opt. Mater. 92 (2019) 174-180.
[40]	J. Bin, H. Liu, L. Mei, L. Liang, H. Gao, H. Li, L. Liao, Ceram. Int. 45 (2019) 1837-1845.
[41]	W. Zhang, Y. Liang, Y. Zhu, S. Liu, H. Li, W. Lei, J. Am. Ceram. Soc. 102 (2019) 5223-5233.
[42]	C. Yue, S. Liu, D. Zhu, J. Alloys. Compd. 783 (2019) 19-27.
[43]	S.A. Khan, N.Z. Khan, W.W. Ji, L. Ali, H. Abadikhah, L. Hao, X. Xu, S. Agathopoulos, Q. Khan, L. Zhu, Dye. Pigment. 160 (2019) 675-682.

Warm white emission of LaSr₂F₇:Dy³⁺/Eu³⁺ NPs with excellent thermal stability for indoor illumination

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