Sr 4 Al 14 O 25 형광체의 합성과 발광특성

한상혁; 김영진; Sang Hyuk Han; Young Jin Kim

Korean Journal of Materials Research, Vol.14, No.8, 529-534, August, 2004

DOI10.3740/MRSK.2004.14.8.529 Export Citation

Sr 4 Al 14 O 25 형광체의 합성과 발광특성

Synthesis and Luminescent Characteristics of Sr 4 Al 14 O 25 Phosphor

한상혁^†, 김영진

경기대학교 재료공학과

Sang Hyuk Han^†, and Young Jin Kim

Department of Materials Science and Engineering, Kyonggi University, Suwon, 443-760, Korea

E-mail:

Sr 4 Al 14 O 25 was synthesized by solid state reaction with flux. H 3 BO 3 was used to synthesize SrO?Al 2 O 3 phosphor system as a flux. The effect of doping system such as Eu+Dy, Eu, and Ce on the luminescent properties of Sr 4 Al 14 O 25 was investigated. Both PL spectra of Sr 4 Al 14 O 25 :Eu and Sr 4 Al 14 O 25 :Eu+Dy excited at 390 nm showed greenish-blue emission at about 490 nm, while the emission wavelength was shifted to 400 nm by doping Ce. The reduction of Eu 3+ ions to Eu 2+ could be accomplished by the annealing process under N + 2 vacuum atmosphere, and attributed to the emission at 490 nm. It is verified that Sr 4 Al 14 O 25 :Eu phosphor is suitable for white LEDs became of a broad absorption band peaking at 390 nm.

Keywords:white LED;phosphor;CRI;CCT

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Srivastava AM, Comanzo HA, McNulty TF, USA Patent No.6621211 B1 (2003) (2003)
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Katsumata T, Toyomane S, Tonegawa A, Kanai Y, Kaneyama U, Shakuno K, Sakai R, Komuro S, Morikawa T, J. Crystal Growth, 237-239, 361 (2002)
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Peng MY, Pei ZW, Hong GY, Su Q, Chem. Phys. Lett., 371(1-2), 1 (2003)
Song YK, Choi SK, Moon HS, Kim TW, Mho SI, Park HL, Mater. Res. Bull., 32(3), 337 (1997)
Lin YH, Zhang ZT, Tang ZL, Zhang JY, Zheng ZS, Lu X, Mater. Chem. Phys., 70(2), 156 (2001)

[Related Articles]

[1] Narukawa Y, Saijou S, Kawakami Y, Fujita S, Mukai T, Nakamura S, Appl. Phys. Lett., 74(4), 558 (1999)

[2] Srivastava AM, Comanzo HA, McNulty TF, USA Patent No.6621211 B1 (2003) (2003)

[3] Yu X, Zhou C, He X, Peng Z, Yang S, Mater. Lett., 58, 1087 (2004)

[4] Nag A, Kutty TRN, J. Alloys and Compounds, 354, 221 (2003)

[5] Wang D, Wang MQ, Lu GL, J. Mater. Sci., 34(20), 4959 (1999)

[6] Yang P, Lu MK, Song CF, Xu D, Yuan DR, Cai DX, Gu F, Optical Materials, 20, 135 (2002)

[7] Dorenbos P, J. Luminescence, 104, 239 (2003)

[8] Meijerink A, Nuyten J, Blasse G, J. Luminescence, 44(1-2), 19 (1989)

[9] Katsumata T, Toyomane S, Tonegawa A, Kanai Y, Kaneyama U, Shakuno K, Sakai R, Komuro S, Morikawa T, J. Crystal Growth, 237-239, 361 (2002)

[10] Lin Y, Tang Z, Zhang Z, Mater. Lett., 51, 14 (2001)

[11] Chang CK, Jiang L, Mao DL, Feng CL, Ceramics International, 30, 285 (2003)

[12] Peng MY, Pei ZW, Hong GY, Su Q, Chem. Phys. Lett., 371(1-2), 1 (2003)

[13] Song YK, Choi SK, Moon HS, Kim TW, Mho SI, Park HL, Mater. Res. Bull., 32(3), 337 (1997)

[14] Lin YH, Zhang ZT, Tang ZL, Zhang JY, Zheng ZS, Lu X, Mater. Chem. Phys., 70(2), 156 (2001)