Growth and optical properties of Dy³⁺/Eu³⁺ co-doped NaYF₄ single crystals with cubic lattice for white LED application

Abstract

Dy³⁺/Eu³⁺ co-doped cubic lattice NaYF4 single crystal with high quality in the size of ~Φ1.0 cm×10.0 cm was grown by an improved Bridgman method using potassium fluoride (KF) as assistant flux. X-ray diffraction (XRD), absorption spectra, excitation spectra and emission spectra are measured to investigate the phase and luminescent properties of the crystal. The effects of excitation wavelength and concentrations of Dy³⁺ and Eu³⁺ ions on the luminescent characteristics are analyzed. The NaYF₄ single crystal with the doping molar concentrations of 1.205% Dy³⁺ and 0.366% Eu³⁺ exhibits an excellent white light emission with chromaticity coordinates of x=0.321, y=0.332. It indicates that the Dy³⁺/Eu³⁺ co-doped cubic lattice NaYF₄ single crystal can be a potential luminescent material for the ultraviolet (UV) light excited white light emitting diode (w-LED).

Keywords

Correlate Color Temperature / Potassium Fluoride / Strong Blue Emission / Doping Molar Concentration / Hexagonal NaYF

References

[1] ZhuC. F., ChaussedenS., LiuS. J., ZhangY. F., MonteilA., GaumerN., YueY. Z.. Journal of Alloys and Compounds, 2013, 555: 232

[2] WANGP.-y., XIAH.-p., PENGJ.-t., TANGL., HUH.-y.. Journal of Optoelectronics Laser, 2013, 24: 2143

[3] DONGY.-m., XIAH.-p., FUL., LIS.-s., GUX.-m., ZHANGJ.-l., WANGD.-j., ZHANGY.-p., JIANGH.-c., CHENB.-j.. Optoelectronics Letters, 2014, 10: 262

[4] FuL., XiaH. P., DongY. M., LiS. S., GuX. M., JiangH. C., ChenB. J.. IEEE Photonics Technology Letters, 2014, 26: 1485

[5] JiaoZ. W., LiS. X., YanQ. F., WangX. Q., ShenD. Z.. Journal of Physics and Chemistry of Solids, 2011, 72: 252

[6] SuyverJ. F., GrimmJ., van VeenM. K., BinerD., KrämerK. W., GüdelH. U.. Journal of Luminescence, 2006, 117: 1

[7] GomesL., LibrantzA. F. H., JagosichF. H., AlvesW. A. L., RanieriI. M., BaldochiS. L.. Journal of Applied Physics, 2009, 106: 103508

[8] LiuP., ZhouG. H., ZhangJ., ChenS., YangY., WangS. W.. Journal of Luminescence, 2013, 144: 57

[9] DingM. Y., XiJ. H., YinS. L., JiZ. G.. Superlattices and Microstructures, 2015, 83: 390

[10] SouzaW. S., DominguesR. O., BuenoL. A., da CostaE. B., Gouveia-NetoA. S.. Journal of Luminescence, 2013, 144: 87

[11] GUC.-J., CHENX.-y., SUND.-l., LUOJ.-q., CHENJ.-k., ZHANGH.-l., ZHANGQ.-l., YINS.-t.. Journal of Optoelectronics Laser, 2014, 25: 491

[12] ThomaR. E., HebertG. M., InsleyH., WeaverC. F.. Inorganic Chemistry, 1963, 2: 1005

[13] HuH. Y., XiaH. P., HuJ. X., WangP. Y., PengJ. T., ZhangY. P., JiangH. C., ChenB. J.. Journal of Alloys and Compounds, 2013, 573: 187

[14] MortimerR. J., VarleyT. S.. Displays, 2011, 32: 35

[15] ZhengY., ChenB. J., ZhongH. Y., SunJ. S., ChengL. H., LiX. P.. Journal of the American Ceramic Society, 2011, 94: 1766

[16] TANL., LIUY.-l., YUF.-h.. Optical Instruments, 2004, 26: 41

[17] DavisW., OhnoY.. Optical Engineering, 2010, 49: 033602