DOI QR코드

DOI QR Code

Synthesis and photoluminescence characteristics of SrAl2O4:Mn4+ phosphor for LED applications

LED용 SrAl2O4:Mn4+ 형광체 합성 및 발광특성 연구

  • Byoung Su Choi (Department of Nano Fusion Technology, Pusan National University) ;
  • Jun Ho Lee (Department of Nanomechatronics Engineering, Pusan National University) ;
  • Sungu Hwang (Department of Nanomechatronics Engineering, Pusan National University) ;
  • Jin Kon Kim (Department of Nanomechatronics Engineering, Pusan National University) ;
  • Byeong Woo Lee (Department of Ocean Advanced Materials Convergence Engineering, Korea Maritime & Ocean University) ;
  • Hyun Cho (Department of Nanomechatronics Engineering, Pusan National University)
  • 최병수 (부산대학교 나노융합기술학과) ;
  • 이준호 (부산대학교 나노메카트로닉스공학과) ;
  • 황승구 (부산대학교 나노메카트로닉스공학과) ;
  • 김진곤 (부산대학교 나노메카트로닉스공학과) ;
  • 이병우 (한국해양대학교 해양신소재융합공학과) ;
  • 조현 (부산대학교 나노메카트로닉스공학과)
  • Received : 2023.01.19
  • Accepted : 2023.02.13
  • Published : 2023.02.28

Abstract

A non-rare earth-based strontium-aluminate red light emitting phosphor was synthesized by a solid-state reaction method and the effect of synthesis temperature and Mn4+ activator concentration on the photoluminescence characteristics of the phosphor was studied. The synthesized SrAl2O4:Mn4+ phosphor showed broad band absorption characteristics in the near-ultraviolet and blue regions with peaks at wavelengths of near 330 and 460 nm, and a triple band deep red emission consisted of three peaks at near 644, 658, and 673 nm. The SrAl2O4:Mn4+ phosphor synthesized at a temperature 1600℃ and a Mn4+ activator concentration of 0.5 mol% showed the strongest PL emission intensity, and concentration quenching was observed at concentrations higher than 0.7 mol%. FE-SEM and DLS particle size distribution analysis showed that the synthesized SrAl2O4:Mn4+ phosphor had a particle size distribution of 2~6.4 ㎛ and an irregular spherical shape with an average particle size of ~4 ㎛.

LED용 비희토류 기반 strontium-aluminate 계 적색 발광 형광체를 고상반응법으로 합성하였고, 합성온도 및 Mn4+ 활성제 첨가량이 형광체의 발광특성에 미치는 영향에 대하여 조사하였다. 합성된 SrAl2O4:Mn4+ 형광체는 330 및 460 nm 근처 파장에서 피크가 나타나는 근자외선 및 청색 영역의 광대역 흡광 특성과 644, 658, 및 673 nm 근처의 세 개의 피크로 이루어진 삼중밴드 형태의 deep red 발광 특성을 나타내었다. 합성온도 1600℃, 0.5 mol% Mn4+ 이온 첨가량에서 합성된 SrAl2O4:Mn4+ 형광체가 가장 우수한 발광 특성을 나타내었고, 0.7 mol% 이상의 첨가량에서는 농도소광이 관찰되었다. FE-SEM 및 DLS 입도크기분포 분석 결과 합성된 SrAl2O4:Mn4+ 형광체 2~6.4 ㎛의 입도 분포 및 불규칙한 구형을 나타내며 약 4 ㎛의 평균 입자 크기를 갖는 것으로 조사되었다.

Keywords

Acknowledgement

이 과제는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었음.

References

  1. P. Pust, P.J. Schmidt and W. Schnick, "A revolution in lighting", Nat. Mater. 14 (2015) 454.
  2. D.Q. Chen, W.D. Xiang, X.J. Liang, J.S. Zhong, H. Yu, M.Y. Ding, H.W. Lu and Z.G. Ji, "Advances in transparent glass-ceramic phosphors for white light-emitting diodes-A review", J. Eur. Ceram. Soc. 35 (2015) 859.
  3. H. Zhu, C.C. Lin, W. Luo, S. Shu, Z. Liu, Y. Liu, J. Kong, E. Ma, Y. Cao, R.-S. Liu and X. Chen, "Highly efficient non-rare-earth red emitting phosphor for warm white light-emitting diodes", Nat. Commun. 5 (2014) 1.
  4. F. Yang, Z.P. Yang, Q.M. Yu, Y.F. Liu, X. Li and F.C. Lu, "Sm3+-doped Ba3Bi(PO4)3 orange reddish emitting phosphor", Spectrochem. Acta A 105 (2013) 626.
  5. B. Wang, H. Lin, J. Xu, H. Chen and Y. Wang, "CaMg2Al16O27:Mn4+-based red phosphor: A potential color converter for high-powered warm W-LED", A.C.S. Appl, Mater. Interfaces 6 (2014) 22905.
  6. S.H. Choi, S.B. Kwon, J.H. Yoo, J.P. Kim, W.H. Kim, H.J. Jeong, B.Y. Kim, D.H. Yoon and Y.H. Song, "Fabrication and analysis of luminous properties of phosphor ceramic for laser headlamp in automotive application", J. Korean Cryst. Growth Cryst. Technol. 30 (2020) 73.
  7. O.G. Jeong, J.C. Park, J.H. Ryu and H. Cho, "Luminescence properties of novel Sr-Y-Si-Oxynitride yellow phosphor for LED application", J. Korean Cryst. Growth Cryst. Technol. 23 (2013) 195.
  8. L. Chen, X. Deng, E. Zhao, X. Chen, S. Xue, W. Zhang, S. Chen, Z. Zhao, W. Zhang and T. Chan, "The effect of electron cloud expansion on the red luminescence of Sr4Al14O25:Mn4+ revealed by calculation of the Racah parameters", J. Alloy Compd. 613 (2014) 312.
  9. Y. Takeda, H. Kato, M. Kabayashi, H. Kobayashi and M. Kakihana, "Photoluminescence properties of Mn4+-activated perovskite-type titanates, La2MTiO6:Mn4+ (M=Mg and Zn)", Chem. Lett. 44 (2015) 1541.
  10. Y. Jin, M.H. Fang, M. Grinberg, S. Mahlik, T. Lesniewski, M.G. Brik, G.Y. Luo and R.S. Liu, "Narrow red emission band fluoride phosphor KNaSiF6:Mn4+ for warm white light-emitting diodes", ACS Appl. Mater. Interfaces 8 (2016) 11194.
  11. B.S. Choi, D.H. Lee, J.H. Ryu and H. Cho, "Photoluminescence properties of Mn4+-activated Li2ZnSn2O6 red phosphors", J. Ceram. Proc. Res. 20 (2019) 80.
  12. Z.B. Wang, I.H. Chu, F. Zhou and S.P. Ong, "Electronic structure descriptor for the discovery of narrowband red-emitting phosphors", Chem. Mater. 28 (2016) 4024.
  13. R.-J. Xie, H.T. Bert Hintzen and D. Johnson, "Light converting inorganic phosphors for white light-emitting diodes", J. Am. Ceram. Soc. 96 (2013) 665.
  14. R.E. Rojas-Hernandez, F. Rubio-Marcos, R.H. Goncalves, M.A. Rodriguez, E. Veron, M. Allix, C. Bessada and J.F. Fernandez, "Original synthetic route to obtain a SrAl2O4 phosphor by the molten salt method; Insights into the reaction mechanism and enhancement of the persistent luminescence", Inorg. Chem. 54 (2015) 9896.
  15. N.T.K. Chi, N.T. Tuan, N.T.K. Lien and D.H. Nguyen, "Red emission of SrAl2O4:Mn4+ phosphor for warm white light-emitting diodes", J. Electron. Mater. 47 (2018) 4571.