고연색 백색 광원용 BaSi2O2N2:Eu 형광체의 광학·구조 특성 분석

이성훈; 강태욱; 강현우; 정용석; Jongsu Kim; 허훈; Sunghoon Lee; Taewook Kang; Hyeonwoo Kang; Yongseok Jeong; 김종수; Hoon Heo

Korean Journal of Materials Research, Vol.29, No.7, 437-442, July, 2019

DOI10.3740/MRSK.2019.29.7.437 Export Citation

고연색 백색 광원용 BaSi2O2N2:Eu 형광체의 광학·구조 특성 분석

Optical and Structural Analysis of BaSi2O2N2:Eu Green Phosphor for High-Color-Rendering Lighting

이성훈¹, 강태욱², 강현우¹, 정용석¹, Jongsu Kim^{1, 2}, 허훈^{1, †}

¹부경대학교 융합디스플레이공학과
²부경대학교 LED 공학협동과정

Sunghoon Lee¹, Taewook Kang², Hyeonwoo Kang¹, Yongseok Jeong¹, 김종수^{1, 2}, and Hoon Heo^{1, †}

¹Department of Display Science and Engineering, Pukyong National University, Busan 48513, Republic of Korea
²Interdisciplinary Program of LED and Solid State Lighting Engineering, Pukyong National University, Busan 48513, Republic of Korea

E-mail:

Green BaSi2O2N2:0.02Eu2+ phosphor is synthesized through a two-step solid state reaction method. The first firing is for crystallization, and the second firing is for reduction of Eu3+ into Eu2+ and growth of crystal grains. By thermal analysis, the three-time endothermic reaction is confirmed: pyrolysis reaction of BaCO3 at 900 °C and phase transitions at 1,300 °C and 1,400 °C, By structural analysis, it is confirmed that single phase [BaSi2O2N2] is obtained with Cmcm space group of orthorhombic structure. After the first firing the morphology is rod-like type and, after the second firing, the morphology becomes round. Our phosphor shows a green emission with a peak position of 495 nm and a peak width of 32 nm due to the 4f65d1→4f7 transition of Eu2+ ion. An LED package (chip size 5.6 x 3.0 mm) is fabricated with a mixture of our green BaSi2O2N2, and yellow Y3Al5O12 and red Sr2Si5N8 phosphors. The color rendering index (90) is higher than that of the mixture without our green phosphor (82), which indicates that this is an excellent green candidate for white LEDs with a deluxe color rendering index.

Keywords:BaSi2O2N2:Eu;oxynitride phosphor;white LED;color rendering index

[References]

Zehnder U, Weimar A, Strauss U, Fehrer M, Hahn B, Lugauer HJ, Harle V, J. Cryst. Growth, 230(3-4), 497 (2001)
Schubert EF, Kim JK, Science, 308, 1274 (2005)
Yen WM, Shionoya S, Yamamoto H, Phosphor Handbook, 2nd ed., CRC Press, Boca Raton, (2007).
Kim JK, Luo H, Schubert EF, J. Appl. Phys., 69, 37709 (1998)
Nakamura S, Mukai T, Senoh M, Appl. Phys. Lett., 64, 1687 (1994)
IES Method for Evaluating Light Source Color Rendition IES TM-30-18, Illuminating Engineering Society, 2018 from Approved American National Standard database.
Kim CH, Ceramist, 16, 13 (2013)
Kimura N, Sakuma K, Hirafune S, Asano K, Appl. Phys. Lett., 90, 051109 (2007)
Song XF, Fu RL, Agathopoulos S, He H, Zhao XR, Yu XD, J. Am. Ceram. Soc., 94(2), 501 (2011)
Yun BG, Horikawa T, Hanzawa H, Machida K, J. Electrochem. Soc., 157(10), J364 (2010)
Wang B, Chen J, Xia Y, Liu Y, J. Nanosci. Nanotechnol., 15, 1 (2015)
Kechele J, Oeckler O, Stadler F, Schnick W, Solid State Sci., 11, 537 (2009)
Xie RJ, Hirosaki N, Li Y, Takeda T, materials, 3, 3777 (2010)
OZTURK E, Karacaoglu E, Bull. Mater. Sci., 40, 25 (2017)
Seibald M, Oeckler O, Celinski VR, Schmidt PJ, Tucks A, Schnick W, Sol. Stat. Sci., 12, 1769 (2011)
Kim HG, Kang EH, Kim BH, Hong SH, Opi. Mater., 35, 1279 (2013)
Li YQ, Delsing ACA, de With G, Hintzen HT, Chem. Mater., 17, 3242 (2005)

[1] Zehnder U, Weimar A, Strauss U, Fehrer M, Hahn B, Lugauer HJ, Harle V, J. Cryst. Growth, 230(3-4), 497 (2001)

[2] Schubert EF, Kim JK, Science, 308, 1274 (2005)

[3] Yen WM, Shionoya S, Yamamoto H, Phosphor Handbook, 2nd ed., CRC Press, Boca Raton, (2007).

[4] Kim JK, Luo H, Schubert EF, J. Appl. Phys., 69, 37709 (1998)

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

[6] IES Method for Evaluating Light Source Color Rendition IES TM-30-18, Illuminating Engineering Society, 2018 from Approved American National Standard database.

[7] Kim CH, Ceramist, 16, 13 (2013)

[8] Kimura N, Sakuma K, Hirafune S, Asano K, Appl. Phys. Lett., 90, 051109 (2007)

[9] Song XF, Fu RL, Agathopoulos S, He H, Zhao XR, Yu XD, J. Am. Ceram. Soc., 94(2), 501 (2011)

[10] Yun BG, Horikawa T, Hanzawa H, Machida K, J. Electrochem. Soc., 157(10), J364 (2010)

[11] Wang B, Chen J, Xia Y, Liu Y, J. Nanosci. Nanotechnol., 15, 1 (2015)

[12] Kechele J, Oeckler O, Stadler F, Schnick W, Solid State Sci., 11, 537 (2009)

[13] Xie RJ, Hirosaki N, Li Y, Takeda T, materials, 3, 3777 (2010)

[14] OZTURK E, Karacaoglu E, Bull. Mater. Sci., 40, 25 (2017)

[15] Seibald M, Oeckler O, Celinski VR, Schmidt PJ, Tucks A, Schnick W, Sol. Stat. Sci., 12, 1769 (2011)

[16] Kim HG, Kang EH, Kim BH, Hong SH, Opi. Mater., 35, 1279 (2013)

[17] Li YQ, Delsing ACA, de With G, Hintzen HT, Chem. Mater., 17, 3242 (2005)