Preparation and Luminescence Characteristics of Ba1.97Ca1-x(B3O6)2∶Eu2+0.03, Mnx2+ Phosphor for White LED
SONG En-hai1，ZHAO Wei-ren1*, ZHOU Guo-xiong1, DOU Xi-hua1, YUN Jun1, YI Chun-yu2
1. School of Physics & Optoelectronic Engineering，Guangdong University of Technology, Guangzhou 510006, China 2. Huizhou Unihero Semiconductor Lighting Technology Co., Ltd.，Huizhou 516006, China
Abstract：The Ba1.97Ca1-x(B3O6)2∶Eu2+, Mnx2+(x=0,0.03,0.06,0.15) phosphors were synthesized by high temperature solid-state reaction, and their phase composition and luminescence properties were studied. In these phosphors, Eu2+ locates at the crystal sites of Ba2+ and Ca2+ ions. Under 317 nm UV light excitation, the 5d→4f transition of Eu2+ forms a broad blue emission band with a peak at 450 nm. With the energy transfer from Eu2+ions, Mn2+ ions emit a broad red band with the peak at 600 nm. The mixture of the broad blue emission and a broad red emission forms an approximate white light with the CIE chromaticity (x=0.371, y=0.282). The phosphors can be excited effectively by UV light in the range of 250-400 nm, so they are the potential candidates for single white light-emitting phosphor excited by UV-LED.
[1] Wu Z C, Liu J, Gong M L, et al. Journal of the Electrochemical Society, 2009, 156(3): H153. [2] Guo C, Luan L, Shi L, et al. Electrochemical and Solid-State Letters, 2010, 13(4): J28. [3] Nakamura S, Fasol G. The Blue Laser Diode: GaN Based Light Emitters and Lasers. Berlin: Springer, 1997. [4] Guo C, Luan L, Ding X, et al. Applied Physics B: Lasers and Optics, 2009, 95(4): 779. [5] Huang C H, Chen T M. Optics Express, 2010, 18(5): 5089. [6] Zhang X M, Li W L, Seo H J. Physics Letters A, 2009, 373(38): 3486. [7] Choi N S, Park K W, Park B W, et al. Journal of Luminescence, 2010, 130(4): 560. [8] Guo C, Ding X, Luan L, et al. Sensors and Actuators B: Chemical, 2010, 143(2): 712. [9] Huang C H, Chen T M, Liu W R, et al. ACS Applied Materials & Interefaces, 2010, 2(3): 347. [10] Liu W R, Chiu Y C, Yeh Y T, et al. Journal of the Electrochemical Society, 2009, 156(7): J165. [11] Poort S, Van Krevel J, Stomphorst R, et al. Journal of Solid State Chemistry, 1996, 122(2): 432. [12] Shannon R D. Acta Crystallographica Section A: Crystal Physics, Diffraction, Theoretical and General Crystallography, 1976, 32(5): 751. [13] Dorenbos P. Journal of Luminescence. 2003, 104(4): 239. [14] Blasse G, Grabmaier B C. Luminescent Materials. Berlin: Springer, 1994. 52. [15] Duan C J, Delsing A, Hintzen H T. Chem. Mater., 2009, 21(6): 1010. [16] Kim Y, Choi S, Jung H. Journal of Luminescence, 2010, 130(1): 60.
