A blue and Red Bicolor Emission Phosphor Excited by a Single n-UV and Its Self-reduction of Eu3+ → Eu2+ in Na2Al2B2O7
Source abstract
Abstract
It has great significance to find a path on generating multicolor with one n-UV chip coated with single phosphor. Herein, Eu doped Na2Al2B2O7 (NAB) phosphor is synthesized by solid state reaction in air atmosphere. Both 4f65d1 → 4f7 transitions of Eu2+ (445 nm) and f–f transitions as 5D0 → 7FJ (J = 0, 1, and 2) of Eu3+ (570–650 nm) have been observed. When increasing Eu doping concentration, both the luminescence intensity and lifetime of Eu3+ are increased and no obvious concentration quenching is observed, while the emission strength of Eu2+ does not change monotonically but with two remarkable peak values. The optimum doping concentration of Eu is 16%. Furthermore, Eu3+ is determined to be from Eu(BO3) matrix itself, and Eu2+ testified by ESR and XPS is created by self-reduction of Eu3+ to Eu2+ in NAB due to charge compensation. When x ≥ 0.16, the Eu3+ ion would rather bond with BO3 triangles in Eu(BO3) than stay as Eu2+ in AlO4 tetrahedral in NAB. Furthermore, the as prepared sample shows an excellent thermal stability and the PL quantum efficiencies of NAB: 0.16Eu sample excited by 341 nm and 393 nm are 11.99% and 9.39%, respectively. Additionally, the calculated CIE chromaticity coordinates signify that a couple of colors can be generated by adjusting the excitation wavelength owing to the strength changes between blue and red emissions. Therefore, this novel bicolor phosphor can serve as a potential candidate for w-LEDs applications.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Luminescence and Fluorescent Materials · Radiation Detection and Scintillator Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (42)
Show source-provided references
1. Schubert, E., Kim, J.: Solid-state light sources getting smart. Science 308, 1274–1278 (2005)10.1126/science.1108712 ↗
2. Ji, H., Su, J., Young, R.: Healthy, natural, efficient and tunable lighting: four-package white LEDs for optimizing the circadian effect, color quality and vision performance. Light-Sci. Appl. 3, e141 (2014)10.1038/lsa.2014.22 ↗
3. Huang, Botong, Ma, Yongqing, Qian, Shibin, Zou, Dan, Zheng, Ganhong, Dai, Zhengxiang: Luminescent properties of low-temperature-hydrothermally-synthesized and post-treated YAG:Ce (5%) phosphors. Opt. Mater. 36, 1561–1565 (2014)10.1016/j.optmat.2014.04.025 ↗
4. Ghigna, Paolo, Pin, Sonia, Ronda, Cees, Speghini, Adolfo, Piccinelli, Fabio, Bettinelli, Marco: Local structure of the Ce3+ ion in the yellow emitting phosphor YAG:Ce. Opt. Mater. 34, 19–22 (2011)10.1016/j.optmat.2011.07.015 ↗
5. Lee, S., Seo, S.: Optimization of yttrium aluminum garnet:Ce3+ phosphors for white light-emitting diodes by combinatorial chemistry method. J. Electrochem. Soc. 49, J85–J88 (2002)10.1149/1.1511755 ↗
6. Pavitra, E., Raju, G.S.R., Oh, J.H., Bharat, L.K., Jeong, J.H., Huh, Y.S., Yu, J.S.: (BaSr)2SiO4:Eu2+ nanorods with enhanced luminescence properties as green-emitting phosphors for white LED applications. Dyes Pigm. 142, 447–456 (2017)10.1016/j.dyepig.2017.03.065 ↗
7. Sun, Z., Zhu, Z., Guo, Z., Wu, Z., Yang, Z., Zhang, T., Zhang, X.: Electronic structure and luminescent properties of Ce3+-doped Ba3Lu2B6O15, a high-efficient blue-emitting phosphor. Ceram. Int. 45, 7143–7150 (2019)10.1016/j.ceramint.2018.12.220 ↗
8. Liang, S., Shang, M., Lian, H., Li, K., Zhang, Y., Lin, J.: An efficient rare-earth free deep red emitting phosphor for improving the color rendering of white light-emitting diodes. J. Mater. Chem. C 5, 2927–2935 (2017)10.1039/C6TC05499D ↗
9. Liu, Y., Liu, G., Wang, J., Dong, X., Yu, W.: Single-component and warm-white-emitting phosphor NaGd(WO4)2:Tm3+, Dy3+, Eu3+: synthesis, luminescence, energy transfer, and tunable color. Inorg. Chem. 53(21), 11457–11466 (2014)10.1021/ic501284y ↗
10. Wu, L., Zhang, Y., Gui, M., Lu, P., Zhao, L., Tian, S., Kong, Y., Xu, J.: Luminescence and energy transfer of a color tunable phosphor: Dy3+-, Tm3+-, and Eu3+-coactivated KSr4(BO3)3 for warm white UV LEDs. J. Mater. Chem. 22, 6463–6470 (2012)10.1039/c2jm15506k ↗
11. Devakumar, B., Halappa, P., Shivakumara, C.: Dy3+/Eu3+ co-doped CsGd(MoO4)2 phosphor with tunable photoluminescence properties for near-UV WLEDs applications. Dyes Pigm. 137, 244–255 (2017)10.1016/j.dyepig.2016.10.016 ↗
12. Kulshreshtha, C., Cho, S., Jung, Y., Sohn, K.: Deep red color emission in an Sm2+-Doped SrB4O7 Phosphor. J. Electrochem. Soc. 154(30), J86–J90 (2007)10.1149/1.2429039 ↗
13. Ruan, J., Xie, R.-J., Hirosaki, N., Takeda, T.: Photoluminescence properties and energy transfer in Eu2+–Yb2+codoped SrSi2O2N2 oxynitride phosphor. J. Electrochem. Soc. 159, H66–H71 (2011)10.1149/2.003202jes ↗
14. Zhang, X., Tang, X., Zhang, J., Gong, M.: An efficient and stable green phosphor SrBaSiO4:Eu2+ for light-emitting diodes. J. Lumin. 130(12), 2288–2292 (2010)10.1016/j.jlumin.2010.07.006 ↗
15. Pei, Z., Su, Q.: The valence change from RE3+ SrB4O7: RE prepared in air and to RE2+ (RE = Eu, Sm, Yb) in the spectral properties of RE2+. J. Alloys Compd. 198, 51–53 (1993)10.1016/0925-8388(93)90143-B ↗
16. Peterson, J., Xu, W., Dai, S.: Optical properties of divalent thulium in crystalline strontium tetraborate. Chem. Mate. 7, 1686–1689 (1995)10.1021/cm00057a017 ↗
17. Igashira, Takuya, Mori, Masaki, Okada, Go, Kawaguchi, Noriaki, Yanagida, Takayuki: Optical and scintillation properties of Ce:(Gd8AE2)(SiO4)6O2 (AE = Mg, Ca, Sr and Ba) crystals. Opt. Mater. 64, 239–244 (2017)10.1016/j.optmat.2016.12.013 ↗
18. Ruan, Fengping, Deng, Degang, Ming, Wu, Chen, Bowen, Chengxiao, Wu, Shiqing, Xu: Eu3+ doped self-activated Ca8ZrMg(PO4)6(SiO4) phosphor with tunable luminescence properties. Opt. Mater. 79, 247–254 (2018)10.1016/j.optmat.2018.03.055 ↗
19. Zhang, Y., Chen, J., Xu, C., Li, Y., Jin, S.: Photoluminescence and abnormal reduction of Eu3+ ions in CaAl2O4:EU nanophosphors calcined in air atmosphere. Physica B 472, 6–10 (2015)10.1016/j.physb.2015.04.018 ↗
20. Tong, C., Zhu, Y., Xu, C., Li, Y.: Preliminary observation of self-reduction of Eu ions in α-Ca3(PO4)2 phosphors prepared in air condition. Physica B 500, 20–23 (2016)10.1016/j.physb.2016.07.026 ↗
21. Wang, S., Gao, H., Sun, G., Li, Y., Wang, Y., Liu, H., Chen, C., Yang, L.: Structure characterization, optical and photoluminescence properties of scheelite-type CaWO4 nanophosphors: effects of calcination temperature and carbon skeleton. Opt. Mater. 99, 109562 (2020)10.1016/j.optmat.2019.109562 ↗
22. Ma, Z., Tian, S., Wu, H., Zhang, J., Li, H.: Self-reduction of Yb3+ to Yb2+ and red persistent luminescence of Na2CaGe2O6:Yb2+ phosphor. Ceram. Int. 44(12), 14582–14586 (2018)10.1016/j.ceramint.2018.05.078 ↗
23. Su, Q., Liang, H., Hu, T., Tao, Y., Liu, T.: Preparation of divalent rare earth ions in air by aliovalent substitution and spectroscopic properties of Ln2+. J. Alloys Compd. 344, 132–136 (2002)10.1016/S0925-8388(02)00351-1 ↗
24. Zhang, C., Yang, J., Lin, C., Li, C., Lin, J.: Reduction of Eu3+ to Eu2+ in MAl2Si2O8 (M = Ca, Sr, Ba) in air condition. J. Solid State Chem. 182(7), 1673–1678 (2009)10.1016/j.jssc.2009.04.009 ↗
25. Dai, W.: Mechanism of the reduction and energy transfer between Eu2+ and Eu3+ in Eu-doped CaAl2Si2O8 materials prepared in air. J. Mater. Chem. C 2(20), 3951–3959 (2014)10.1039/C3TC32378A ↗
26. Li, H., Wang, Y.: Effect of oxygen vacancies on the reduction of Eu(3+) in Mg3Ca3(PO4)4 in air atmosphere. Inorg. Chem. 56(17), 10396–10403 (2017)10.1021/acs.inorgchem.7b01315 ↗
27. Cao, R., Liang, T., Li, W., Cao, C., Wen, Y., Hu, Q.: Energy transfer and luminescence properties of Sr[1−3(x+y)/2]Al2B2O7:xEu3+, yBi3+ phosphor. Spectrochim. Acta. A 146, 38–42 (2015)10.1016/j.saa.2015.03.036 ↗
28. Zheng, Y., Chen, D., Li, W.: A study on the luminescence properties of CaAl2B2O7:Eu2+ phosphor. Physica B 406(4), 996–999 (2011)10.1016/j.physb.2010.12.046 ↗
29. Sun, J., Sun, Y., Lai, J., Xia, Z., Du, H.: Luminescence properties and energy transfer investigations of BaAl2B2O7:Ce3+, Tb3+ phosphors. J. Lumin. 132(11), 3048–3052 (2012)10.1016/j.jlumin.2012.06.018 ↗
30. Palaspagar, R., Gawande, A., Sonekar, R., Omanwar, S.: Combustion synthesis and photoluminescence properties of a novel Eu3+ doped lithium alumino-borate phosphor. J. Lumin. 154, 58–61 (2014)10.1016/j.jlumin.2014.03.003 ↗
31. Palaspagar, R., Sonekar, R., Omanwar, S.: Novel inorganic borate host phosphor K2Al2B2O2:Dy3+ for LED based solid state lighting. AIP Conf. Proc. 1536, 807–808 (2013)10.1063/1.4810473 ↗
32. Xiao, W., Zhang, X., Hao, Z., Pan, G., Luo, Y., Zhang, L., Zhang, J.: Blue-emitting K2Al2B2O7:Eu2+ phosphor with high thermal stability and high color purity for near-UV-pumped white light-emitting diodes. Inorg. Chem. 54(7), 3189–3195 (2015)10.1021/ic502773t ↗
33. Hoppe, H.: Recent developments in the field of inorganic phosphors. Angew. Chem. Int. Ed. Engl. 48(20), 3572–3582 (2009)10.1002/anie.200804005 ↗
34. Wang, J., Jing, X., Yan, C., Lin, J., Liao, F.: Influence of fluoride on f–f transitions of Eu3+ in LiEuM2O8 (M = Mo, W). J. Lumin. 121(1), 57–61 (2006)10.1016/j.jlumin.2005.10.003 ↗
35. He, M., Chen, X., Zhou, T., He, B., Xu, Y., Xu, T.: Crystal structure and infrared spectra of Na2Al2B2O7. J. Alloys Compd. 327, 210–214 (2001)10.1016/S0925-8388(01)01561-4 ↗
36. Shannon, R.: Revised effective ionic radii and systematic studies of interatomie distances in halides and chaleogenides. Acta Cryst. A 32, 751–767 (1976)10.1107/S0567739476001551 ↗
37. He, M., Kienle, L., Simon, A., Chen, X., Duppel, V.: Re-examination of the crystal structure of Na2Al2B2O7: stacking faults and twinning. J. Solid State Chem. 177(9), 3212–3218 (2004)10.1016/j.jssc.2004.06.008 ↗
38. Kang, F., Peng, M.: A new study on the energy transfer in the color-tunable phosphor CaWO4:Bi. Dalton Trans. 43(1), 277–284 (2012)10.1039/C3DT51183A ↗
39. Yu, M., Zhang, W., Qin, S., Li, J., Qiu, K.: Synthesis and luminescence properties of single component Ca5(PO4)3F:Dy3+, Eu3+ white emitting phosphors. J. Am. Ceram. Soc. 101(10), 4582–4590 (2018)10.1111/jace.15701 ↗
40. Binnemans, K.: Interpretation of europium(III)spectra. Coord. Chem. Rew. 295, 1–45 (2015)10.1016/j.ccr.2015.02.015 ↗
41. Corbel, G., Leblanc, M., Antic-Fidancev, E., Lemaitre-Blaise, M., Krupa, J.: Luminescence analysis and subsequent revision of the crystal structure of triclinic L-EuBO3. J. Alloys Compd. 287, 71–78 (1999)10.1016/S0925-8388(99)00023-7 ↗
42. Li, S., Yu, L., Sun, J., Man, X.: In-air self-reduction synthesis and photoluminescent properties of Eu2+–Eu3+ activated CaAl2SixO2x+4 phosphors. Ceram. Int. 42(7), 7968–7973 (2016)10.1016/j.ceramint.2016.01.194 ↗