Preparation and Luminescent Properties of Single White Ca₂MgSi₂O₇: Eu³⁺, Ce³⁺, Tb³⁺ Phosphor for WLED

Abstract:

Ca₂MgSi₂O₇: Eu³⁺, Ce³⁺, Tb³⁺, a single white Phosphor, was synthesized by the conventional solid-state reaction. The structure, surface morphology and luminescence properties of the prepared samples were investigated to evaluate its potentiality. XRD results confirm the orthorhombic phase of Ca₂MgSi₂O₇: Eu³⁺, Ce³⁺, Tb³⁺ phosphors. The excitation spectra indicates the phosphor can be excited by 393 nm wavelength. The phosphor exhibits blue light at 467 nm, green light at 588 nm, red light at 618 nm. CIE chromaticity diagram indicates that Ca₂MgSi₂O₇: Eu³⁺, Tb³⁺, Ce³⁺ exhibits white light. All properties show that the prepared phosphor is a single white phosphor suitable for near ultraviolet excitation which can be applied to new generation white LED lighting.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 395-398
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.395
• Online since: July 2014
• Authors: Xiao Qi Zhang, Li Min Dong*, Xin Cheng Tang, Qin Li, Zhi Dong Han
• Keywords: Alkaline Earth, Mesosilicate, White Light Emitting Diode

References

[1] D. A. Steigerwald., J. C. Bhat, D Collins., et al. Illumination with solid state lighting technology [J]. IEEEJ. Sel. Top. Quant., 2002, 8(2): 310-320.

[2] Gee J. M., Tsao J. Y., Simmons J. A. Prospects of LED lighting [J]. Proc. of SPIE, 2004, 5187: 227-233.

[3] Y. Narukawa, J Narita, T Sakamoto, et al. Recent progress of high efficiency white LED [J]. Phys Stat, 2007, 204: 2087-(2093).

DOI: 10.1002/pssa.200674782

[4] X. Y. Sun, J. H. Zhang, X. Zhang, et al. A Single White Phosphor Suitable for Near Ultraviolet Excitation Applied to New GenerationWhite LED Lighting [J]. Chinese Journal of Luminescence, 2005, 26 (3): 404-406, In Chinese.

[5] Y. Q. Zhai, S. H. Feng, Z. Zhang, et al. Preparation of Orange-red Emitting Phosphors Sr2MgSi3O9: Eu3+ for White LEDs and Its Photoluminescent Properties [J]. Journal of Hebei University, 2009, 29(6): 609-613, In Chinese.

[6] X. Y. Sun, J. H. Zhang, X. Zhang, et al. A green-yellow emitting P-Sr2SiO4: Eu2+ phosphor fornear ultraviolet chip white-light-emitting diode [J]. Rare Earths., 2008, 26(3): 421-424.

DOI: 10.1016/s1002-0721(08)60109-x

[7] Y. Umetsu, S. Okamoto, H. Yamamoto. Photoluminescence Properties of BaMgSiO: Eu2+ Blue Phosphor and BaMgSiO: Eu2+, Mn2+ Blue-Red Phosphor under Near-Ultraviolet-Light Excitation [J]. J. Electrochem. Soc., 2008, 155(7): J193-J197.

DOI: 10.1149/1.2908877

[8] J. S Kim., P. E Jeon., J. C Choi., H. L Park., S. I Mho., G. C. Kim. Warm white lightemitting diode utilizing a single phase full color Ba3MgSi2O8: Eu2+, Mn2+ phosphor [J]. Appl. Phys. Lett., 2004, 84(15): 2931.

DOI: 10.1063/1.1695441