고출력 백색 광원용 Y3Al5O12;Ce3+,Pr3+ 투명 세라믹 형광체의 광학특성

강태욱; 임석규; 김종수; 정용석; Taewook Kang; Seokgyu Lim; Jongsu Kim; Yongseok Jeong

Korean Journal of Materials Research, Vol.29, No.2, 116-120, February, 2019

DOI10.3740/MRSK.2019.29.2.116 Export Citation

고출력 백색 광원용 Y3Al5O12;Ce3+,Pr3+ 투명 세라믹 형광체의 광학특성

Optical Properties of Y3Al5O12;Ce3+,Pr3+ Transparent Ceramic Phosphor for High Power White Lighting

강태욱¹, 임석규², 김종수^{2, 1}, 정용석^{2, †}

¹부경대학교 LED 공학협동과정
²부경대학교 융합디스플레이공학과

Taewook Kang¹, Seokgyu Lim², Jongsu Kim^{2, 3}, and Yongseok Jeong^{2, †}

¹Interdisciplinary Program of LED and Solid State Light Engineering, Pukyong National University, Busan 48513, Republic of Korea
²Dept. of Display Science and Engineering, Pukyong National University, Busan 48513, Republic of Korea
³2Interdisciplinary Program of LED and Solid State Light Engineering, Pukyong National University, Busan 48513, Republic of Korea

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We prepared Y3Al5O12;Ce3+,Pr3+ transparent ceramic phosphor using a solid state reaction method. By XRD pattern analysis and SEM measurement, our phosphors reveal an Ia-3d(230) space group of cubic structure, and the transparent ceramic phosphor has a polycrystal state with some internal cracks and pores. In the Raman scattering measurement with an increasing temperature, lattice vibrations of the transparent ceramic phosphor decrease due to its more perfect crystal structure and symmetry. Thus, low phonon generation is possible at high temperature. Optical properties of the transparent ceramic phosphor have broader excitation spectra due to a large internal reflection. There is a wide emission band from the green to yellow region, and the red color emission between 610 nm and 640 nm is also observed. The red-yellow phosphor optical characteristics enable a high Color Rendering Index (CRI) in combination with blue emitting LED or LD. Due to its good thermal properties of low phonon generation at high temperature and a wide emission range for high CRI characteristics, the transparent ceramic phosphor is shown to be a good candidate for high power solid state white lighting.

Keywords:Y3Al5O12;Ce3+Pr3+ phosphor;transparent ceramic;high CRI

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[1] Nakamura S, Mukai T, Senoh M, Appl. Phys. Lett., 64, 1687 (1994)

[2] Hall RN, Fenner GE, Kingsley JD, Soltys TJ, Carlson RO, Phys. Rev. Lett., 9, 366 (1962)

[3] Alferov ZI, Andreev VM, Garbuzov DZ, Zhilyaev YV, Morozov EP, Portnoi EL, Trofim VG, Sov. Phys. Semicond, 4, 1573 (1971)

[4] Hayashi I, Panish MB, Foy PW, Sumuski S, Appl. Phys. Lett., 17, 109 (1970)

[5] Kim JK, Luo H, Schubert EF, Cho J, Sone C, Park Y, Jpn. J. Appl. Phys., 44, L649 (2005)

[6] Jang HS, Im WB, Lee DC, Jeon DY, Kim SS, J. Lumin., 126, 371 (2007)

[7] Sekita M, Haneda H, Shirasaki S, J. Appl. Phys., 69, 3709 (1998)

[8] Papagelis K, Kanelis G, Ves S, Kourouklis GA, Phys. Status Solidi B, 233, 134 (2002)

[9] Herrmann GF, Pearson JJ, Wickersheim KA, Buchanan RA, J. Appl. Phys., 37, 1312 (1966)

[10] Su LT, Tok AI, Zhao Y, Ng N, Boey FY, J. Phys. Chem., 113, 5974 (2009)

[11] Blasse G, Grabmaier BC, Luminescent Materials, p. 25, Springer, Berlin, Germany, (1994).

[12] Aggarwal RL, Ripin DJ, Ochoa JR, Fan TY, J. Appl. Phys., 98, 103514 (2005)