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A series of blue-emitting phosphors M2B5O9Cl: Eu2+(M=Ca, Sr) were synthesized by solid-state methods. And the phosphors were characterized by XRD and photoluminescence emission (PL) and excitation (PLE) spectra. The factors that affect the PL intensity of phosphor Sr2B5O9Cl have been investigated, and the optimal conditions to obtain the blue emitting phosphor are 8 mol% Eu2+concentration, 5.0mol % excess of SrCl2. As Ca partially or completely substituted Sr in the host Sr2B5O9Cl, the emission peak shifts from 425 to 453 nm. The most important is that the phosphors M2B5O9Cl: Eu2+(M=Ca, Sr) show strong absorption in the region of 350—400 nm, which matches well with the emission of the near-ultraviolet or purple LED chips. Comparison with the commercial blue-emitting phosphor, the PL intensity of phosphor Sr1.92Eu0.08B5O9Cl is about 1.8 times that of the commercial blue emitting phosphor BAM. Thus, the phosphors M2B5O9Cl: Eu2+ (M=Ca, Sr) show great potential as the candidate for blue phosphor in n-UV or purple based white LEDs.
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Keywords:
- chloroborates /
- blue emitting phosphor /
- LED
[1] Pan Y X, Wu M M, Su Q 2004 J. Mater. Sci. Eng. B 106 251
[2] Guo C F, Luan L, Ding X, Zhang F, Shi G H, Gao F, Liang L F 2009 Appl. Phys. B 95 779
[3] Xu Y, Chen L H, Li Y Z, Song G F, Wang Y P 2008 Appl. Phys. Lett. 92 021129
[4] Shur M S, Zukauskas A 2005 Proc.IEEE 93 1691
[5] Yu R J, Wang J, Zhang M, Zhang J H, Yuan H B, Su Q 2008 Chem. Phys. Lett. 453 197
[6] Liao Q R, Zhuang W D, Xia T, Liu R H, Hu Y S, Teng X M, Liu Y H 2009 Acta Phys. Sin. 58 2776(in Chinese) [廖秋荣、 庄卫东、夏 天、刘荣辉、胡运生、滕晓明、刘元红 2009 58 2776 ]
[7] Yang Z P, Wang S L, Yang G W, Tian J, Li P L, Li X 2007 Mater. Lett. 61 5258
[8] Yang Z P, Liu Y F, Wang L W, Yu Q M, Xiong Z J, Xu X L 2007 Acta Phys. Sin. 56 546(in Chinese) [杨志平、刘玉峰、王利伟、余泉茂、熊志军、徐小岭 2007 56 546 ]
[9] Wang Z J, Li P L, Yang Z P, Guo Q L, Li X 2010 Chin. Phys. B 19 017801
[10] Dhoble S J, Moharil S V 2000 Phys. Res. Sect. A 160 274
[11] Zhang X M, Chen H, Ding W J, Wu H, Kim J S 2009 J. Am. Ceram. Soc. 92 429
[12] Meijerink A, Blasses G 1989 J. Lumin. 43 283
[13] Powell R C, Blass G 1980 Struct. Bond. (Heidelberg/Berlin: Springer) 42 43
[14] Cywiski R, Fava R, Manfredi M, Mugeski E 1987 Phys. Stat. Sol. (b) 143 433
[15] Ma M X, Zhu D C, Tu M J 2009 Acta Phys.Sin. 58 6512(in Chinese) [马明星、朱达川、涂铭旌 2009 58 6512 ]
[16] Kim J S, Jeon P E, Choi J C, Park H L 2005 Solid State Commun. 133 187
[17] Peters T E, Baglio J 1970 J. Inorg. Nucl. Chem. 32 1089
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[1] Pan Y X, Wu M M, Su Q 2004 J. Mater. Sci. Eng. B 106 251
[2] Guo C F, Luan L, Ding X, Zhang F, Shi G H, Gao F, Liang L F 2009 Appl. Phys. B 95 779
[3] Xu Y, Chen L H, Li Y Z, Song G F, Wang Y P 2008 Appl. Phys. Lett. 92 021129
[4] Shur M S, Zukauskas A 2005 Proc.IEEE 93 1691
[5] Yu R J, Wang J, Zhang M, Zhang J H, Yuan H B, Su Q 2008 Chem. Phys. Lett. 453 197
[6] Liao Q R, Zhuang W D, Xia T, Liu R H, Hu Y S, Teng X M, Liu Y H 2009 Acta Phys. Sin. 58 2776(in Chinese) [廖秋荣、 庄卫东、夏 天、刘荣辉、胡运生、滕晓明、刘元红 2009 58 2776 ]
[7] Yang Z P, Wang S L, Yang G W, Tian J, Li P L, Li X 2007 Mater. Lett. 61 5258
[8] Yang Z P, Liu Y F, Wang L W, Yu Q M, Xiong Z J, Xu X L 2007 Acta Phys. Sin. 56 546(in Chinese) [杨志平、刘玉峰、王利伟、余泉茂、熊志军、徐小岭 2007 56 546 ]
[9] Wang Z J, Li P L, Yang Z P, Guo Q L, Li X 2010 Chin. Phys. B 19 017801
[10] Dhoble S J, Moharil S V 2000 Phys. Res. Sect. A 160 274
[11] Zhang X M, Chen H, Ding W J, Wu H, Kim J S 2009 J. Am. Ceram. Soc. 92 429
[12] Meijerink A, Blasses G 1989 J. Lumin. 43 283
[13] Powell R C, Blass G 1980 Struct. Bond. (Heidelberg/Berlin: Springer) 42 43
[14] Cywiski R, Fava R, Manfredi M, Mugeski E 1987 Phys. Stat. Sol. (b) 143 433
[15] Ma M X, Zhu D C, Tu M J 2009 Acta Phys.Sin. 58 6512(in Chinese) [马明星、朱达川、涂铭旌 2009 58 6512 ]
[16] Kim J S, Jeon P E, Choi J C, Park H L 2005 Solid State Commun. 133 187
[17] Peters T E, Baglio J 1970 J. Inorg. Nucl. Chem. 32 1089
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