Nguyen Thi Kim Chi, Nguyen Duy Hung

Main Article Content


Recently, red-emitting Mn4+ activated oxide phosphors have been a promising material to improve color rending and reduce price of warm white light emitting diodes (w-WLED). Thus, to find suitable red-emitting phosphors applied for w-WLEDs, SrMgAl10O17:Mn4+ (SMA:Mn4+) phosphors were synthesized by co-precipitation method. The effects of annealing temperature on these phosphors’ crystal structure, morphology and photoluminescence properties were investigated. The phosphors were broad excitation bands in the 250-600 nm wavelength range with peaks at 320, 400, and 470 nm. Under excitation of 320 nm wavelength, the phosphors emitted efficient red light around 658 nm. The luminescence mechanism was studied in detail. The optimal doping concentration of Mn4+ ions was about 1.2 mol.%. Thus, the SMA:Mn4+ phosphors would have great potential for applying in near-UV (320, 400 nm) and blue (470 nm) phosphor conversion LED.

Keywords: SrMgAl10O17:Mn4 , phosphor, optical properties, solid state lighting.


[1] B. Wang, H. Lin, F. Huang, J. Xu, H. Chen, Z. Lin, Y. Wang, Non-rare-earth BaMgAl10–2xO17:xMn4+,xMg2+: a narrow-band red phosphor for use as a high-power warm w-LED, Chem. Mater. 28 (2016) 3515-3524.
[2] D. Chen, Y. Zhou, J. Zhong, A review on Mn4+ activators in solids for warm white light-emitting diodes, RSC Adv. 6 (2016) 86285-86296.
[3] C. Yang, Z. Zhang, G. Hu, R. Cao, X. Liang, W. Xiang, A novel deep red phosphor Ca14Zn6Ga10O35:Mn4+ as color converter for warm W-LEDs: Structure and luminescence properties, J. Alloys Compd. 694 (2107) 1201-1208.
[4] S. Zhang, Y. Hu, H. Duan, Y. Fu, M. He, An efficient, broad-band red-emitting Li2MgTi3O8:Mn4+ phosphor for blue-converted white LEDs, J. Alloys Compd. 693 (2107) 315-325.
[5] Y. Arai, S. Adachi , Optical properties of Mn4+-activated Na2SnF6 and Cs2SnF6 red phosphors, J. Lumin. 131, (2011) 2652-2660.
[6] S. Wang, Q. Sun, B. Devakumar, J. Liang, L. Sun, X. Huang, Mn4+-activated Li3Mg2SbO6 as an ultrabright fluoride-free red-emitting phosphor for warm white light-emitting diodes, RSC Adv. 9 (2019) 3429-3435.
[7] Y.-Y. Zhou, E.-H. Song, T.-T. Deng, Q.-Y. Zhang, Waterproof narrow-band fluoride red phosphor K2TiF6:Mn4+ via facile superhydrophobic surface modification, ACS Appl. Mater. Interfaces 10 (2018) 880-889.
[8] L.Y. Wang, E.H. Song, Y.Y. Zhou, T.T. Deng, S. Ye, Q. Y. Zhang, The design and preparation of the thermally stable, Mn4+ ion activated, narrow band, red emitting fluoride Na3GaF6:Mn4+ for warm WLED applications, J. Mater. Chem. C 5 (2017) 2910-2918.
[9] R. Cao, M. Peng, E. Song, J. Qiu, High efficiency Mn4+ doped Sr2MgAl22O36 red emitting phosphor for white LED, ECS J. Solid State Sci. Technol. 1 (2012) R123-R126.
[10] J. Zhong, W. Xu, Q. Chen, S. Yuan, Z. Ji, D. Chen, Mn4+, Li+ co-doped SrMgAl10O17 phosphor-in-glass: application in high-power warm w-LEDs, Dalton Trans. 46 (2017) 9959-9968.
[11] L. Meng, L. Liang, Y.-X. Wen, Deep red phosphors SrMgAl10O17:Mn4+, M (M = Li+, Na+, K+, Cl−) for warm white light emitting diodes, J Mater. Sci. Mater. Electron. 25 (2014) 2676-2681.
[12] L. Wang, H. Zhang, Y. Hui Li, P. Liang, Y. Shen, Enhanced luminescence in the SrMgAl10O17: Eu2+ blue phosphor prepared by a hybrid urea-sol combustion route, Int. J. Appl. Ceram. Technol. 13 (2016) 185-190.
[13] W.J. Tang, D.H. Chen, M. Wu, Luminescence studies on SrMgAl10O17:Eu, Dy phosphor crystals, Opt. Laser Technol. 41 (2009) 81-84.
[14] S. Tigga, N. Brahme, D. P. Bisen, Photoluminescence and mechanoluminescence investigation of bluish-green afterglow SrMgAl10O17:Ce3+phosphor, J. Mater. Sci. Mater. Electron. 28 (2017) 4750-4757.