Xuan-xuan LI, Da-wei WANG, Zhi-ping YANG, et al. Effect of Raw Material Ratio and Fluxes on (Sr0.96, Eu0.04)LiAl3N4 Red Phosphor. [J]. Chinese Journal of Luminescence 41(7):800-808(2020)
Xuan-xuan LI, Da-wei WANG, Zhi-ping YANG, et al. Effect of Raw Material Ratio and Fluxes on (Sr0.96, Eu0.04)LiAl3N4 Red Phosphor. [J]. Chinese Journal of Luminescence 41(7):800-808(2020) DOI： 10.37188/fgxb20204107.0800.
Effect of Raw Material Ratio and Fluxes on (Sr0.96, Eu0.04)LiAl3N4 Red Phosphor
(Sr,0.96, Eu,0.04,)LiAl,3,N,4, red phosphor for high color rendering LED was prepared using Sr,3,N,2, Eu,2,O,3, AlN and Li,3,N as raw materials by high pressure nitrogenize sintering method. The effects of Sr,3,N,2, proportions and different fluxes on morphology and luminescence properties of phosphors were analyzed by scanning electron microscope(SEM), X-ray diffraction(XRD), excitation and emission spectrum. XRD patterns and XRD Rietveld refinement showed that the 1.3 times Sr,3,N,2, material has better luminescent intensity and more pure phase state. The influence of the chlorides and fluorides fluxes on the morphology and luminescent properties was also discussed. NH,4,F and LiCl had better fluxing effect and they were selected as mixed fluxes. The effects of different proportions of the mixed fluxes on the luminescent properties of the phosphors were studied in detail. The experimental results showed that the phosphor had the better particle morphology and the luminescent intensity was increased by nearly 4 times when the combination ratio of NH,4,F and LiCl was 1:1. White LED(4 000 K) was prepared by combining with (Sr,0.96, Eu,0.04,)LiAl,3,N,4, and GAG535 green phosphor and the results indicated that this LED has higher luminous efficiency and higher ,Ra, which was more suitable for high color rendering index white LED.
high color renditionred phosphorflux
KIMJ S, JEON P E, PARK Y H, et al.. White-light generation through ultraviolet-emitting diode and white-emitting phosphor[J].Appl. Phys. Lett., 2004, 85(17):3696-3698.
ZHOU L Y, HUANG J L, YI L H, et al.. Luminescent properties of Ba3Gd(BO3)3:Eu3+ phosphor for white LED applications[J].J. Rare Earths, 2009, 27(1):54-57.
HAQUE M M, LEE H I, KIM D K. Luminescent properties of Eu3+-activated molybdate-based novel red-emitting phosphors for LEDs[J].J. Alloys Compd., 2009, 481(1-2):792-796.
CAO F B, TIAN Y W, CHEN Y J, et al.. Progress in studies on red emitting phosphors for LED device[J]. Mater. Rev., 2008, 22(6):104-107. (in Chinese)
PIAO X Q, MACHIDA K I, HORIKAWA T, et al.. Preparation of CaAlSiN3:Eu2+phosphors by the self-propagating high-temperature synthesis and their luminescent properties[J].Chem. Mater., 2007, 19(18):4592-4599.
PUST P, WEILER V, HECHT C, et al.. Narrow-band red-emitting Sr[LiAl3N4]:Eu2+ as a next-generation LED-phosphor material[J].Nat. Mater., 2014, 13(9):891-896.
PUST P, WOCHNIK A S, BAUMANN E, et al.. Ca[LiAl3N4]:Eu2+-anarrow-band red-emitting nitridolithoaluminate[J].Chem. Mater., 2014, 26(11):3544-3549.
YANG Z P, FANG H J, LI X X, et al.. Syntheis and luminescence properties of SrLiAl3N4:Eu2+red phosphor[J].Chin. J. Lumin., 2016, 37(1):1-6. (in Chinese)
LI W X, SONG Z, CUI D P, et al.. Moisture-induced degradation of the narrow-band red-emitting SrLiAl3N4:Eu2+ phosphor[J].J. Rare Earths, 2018, 36(4):341-345.
ZHANG Y, ZHANG X J, ZHANG H R, et al.. Improving moisture stability of SrLiAl3N4:Eu2+ through phosphor-in-glass approach to realize its application in plant growing LED device[J].J. Colloid Interface Sci., 2019, 545:195-199.
ZHANG L L, ZHANG J H, ZHANG X, et al.. New yellow-emitting nitride phosphor SrAlSi4N7:Ce3+ and important role of excessive AlN in material synthesis[J].ACS Appl. Mater. Interfaces, 2013, 5(24):12839-12846.
LI G H, CHEN J J, MAO Z Y, et al.. Atmospheric pressure preparation of red-emitting CaAlSiN3:Eu2+ phosphors with variable fluxes and their photoluminescence properties[J].Ceramics Int., 2016, 42(1):1756-1761.
WANG Z B, CHU L H, ZHOU F, et al.. Electronic structure descriptor for the discovery of narrow-band red-emitting phosphors[J].Chem. Mater., 2016, 28(11):4024-4031.
XU Z W, FU L, LIU L L, et al.. Effects of single and composite fluxes on the morphology and luminescence intensity of Ce3+ doped Lu3Al5O12 phosphors[J].Mater. Chem. Phys., 2020, 248:122918.
WANG H H, MAO F F, LIU Y J, et al.. Effect of fluxes on luminescence properties of color-tunable Ba1.3Ca0.7SiO4:Eu2+, Mn2+ phosphor for near-ultraviolet white-LEDs[J].Mater. Res. Bull., 2020, 125:110808.
HU M L, LIAO C X, XIA L B, et al.. Low temperature synthesis and photoluminescence properties of Mn4+-doped La2MgTiO6 deep-red phosphor with a LiCl flux[J].J. Lumin., 2019, 211:114-120.
LI L Y, LIN Y P, ZHANG L Z, et al.. Flux exploration, growth, and optical spectroscopic properties of large size LaBSiO5 and Eu3+-substituted LaBSiO5 crystals[J].Cryst. Growth Des., 2017, 17(12):6541-6549.
HUANG J S, LIU R H, LIU Y H, et al.. Effect of fluxes on synthesis and luminescence properties of BaSi 2O2N2:Eu2+ oxynitride phosphors[J].J. Rare Earths, 2018, 36(3):225-230.
WANG W N, WIDIYASTUTI W, OGI T, et al.. Correlations between crystallite/particle size and photoluminescence properties of submicrometer phosphors[J].Chem. Mater., 2007, 19(7):1723-1730.
刘义成.光源的显色性与显色指数[J].电子器件, 2000, 23(1):43-50.
LIU Y C. Color-rendering properties and color-rendering index of light source[J].J. Electron Devices, 2000, 23(1):43-50. (in Chinese)