Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
권호 표지

Y2O3:Eu Phosphor Particles Prepared by Spray Pyrolysis from Solution Containing Flux and Polymeric Precursor

융제 및 고분자 첨가 용액으로부터 분무 열분해 공정에 의해 합성한 Y2O3:Eu 형광체

  • Lee, Chang Hee (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Jung, Kyeong Youl (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Choi, Joong Gill (Department of Chemistry, Yonsei University) ;
  • Kang, Yun Chan (Department of Chemical Engineering, Konkuk University)
  • 이창희 (한국화학연구원 화학소재부) ;
  • 정경열 (한국화학연구원 화학소재부) ;
  • 최중길 (연세대학교 화학과) ;
  • 강윤찬 (건국대학교 화학공학과)
  • Received : 2004.07.16
  • Accepted : 2004.10.27
  • Published : 2005.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

Nano-sized $Y_2O_3:Eu$ phosphor particles were prepared by ultrasonic spray pyrolysis. The effect of polymeric precursor and lithium carbonate flux on the morphology and luminescence characteristics of nano-sized $Y_2O_3:Eu$ phosphor particles was investigated. When using the spray solution containing both the polymeric precursor and the flux, the $Y_2O_3:Eu$ particles with spherical shape and micron size were turned into nano-sized $Y_2O_3:Eu$ phosphor particles during the post-treatment at high temperature. The mean size of $Y_2O_3:Eu$ phosphor particles was affected by the contents of polymeric precursors and lithium carbonate flux, and preparation temperature. The as-prepared particles by spray pyrolysis at high temperature from solution containing high contents of polymeric precursors had good photoluminescence intensity under vacuum ultraviolet after post-treatment above $1,000^{\circ}C$. The prepared nano-sized $Y_2O_3:Eu$ phosphor particles had comparable photoluminescence intensity under vacuum ultraviolet light with that of the commercial $Y_2O_3:Eu$ phosphor particles prepared by solid state reaction method.

초음파 분무 열분해 공정에 의해 나노 크기의 $Y_2O_3:Eu$ 형광체 분말들을 합성하였다. 고분자 전구체와 융제로 사용되어진 리튬 탄산염이 나노 크기의 $Y_2O_3:Eu$ 형광체의 형태 및 발광 특성에 미치는 영향에 대해 조사하였다. 고분자 전구체와 융제를 동시에 사용했을 때 분무 열분해 공정에 의해 제조된 구형의 마이크론 크기의 분말들은 고온의 후열처리 과정에서 나노 크기의 분말로 전환되었다. $Y_2O_3:Eu$ 형광체의 평균 크기는 분무용액에 첨가되어지는 고분자 전구체와 융제인 리튬 탄산염의 첨가량 및 분무 열분해 공정의 반응기 온도에 많은 영향을 받았다. 고농도의 고분자 전구체를 함유한 분무용액으로부터 고온의 반응기에서 합성되고, $1,000^{\circ}C$ 이상에서 후열처리한 나노크기 $Y_2O_3:Eu$ 분말들은 진공자외선 하에서 좋은 발광 특성을 나타내었으며, 고상 공정에 의해 합성된 상용의 $Y_2O_3:Eu$ 형광체와 비슷한 발광 세기를 가졌다.

Keywords

References

  1. Yamamoto, H., 'CRT Phosphors and Application to FED Phosphors,' J. SID., 4(3), 165(1996)
  2. Sievers, R. E., Milewski, P. D., Xu, C. Y. and Watkins, B. A., 'High-Entensity Cathodoluminescence from Sub-Micron Spherical Particles Synthesized by $CO_2$-Assisted Aerosolization,' Ext. Abst. 3rd Int 1 Conf. Sci. & Tech. Display Phosphors, pp. 303, Humtington Beach, CA(1997)
  3. Jiang, Y. D., Wang, Z. L., Zhang, F., Paris, H. P. and Summers, C. J., 'The Effect of Particle Size on the Luminescence Properties of $Y_2O_3$:Eu,' Ext. Abst. 3rd Int 1 Conf. Sci. & Tech. Display Phosphors, pp. 261, Huntington Beach, CA(1997)
  4. Park, J. C., Moon, H. K., Kim, D. K., Byeon, S. H., Kim, B. C. and Suh, K. S., 'Morphology and Cathodoluminescence of Lidoped $Gd_2O_3:Eu^{3+}$, A Red Phosphor Operating at Low Voltages,' Appl. Phys. Lett., 77, 2162-2164(2000) https://doi.org/10.1063/1.1315341
  5. Rao, R. P., 'Preparation and Characterization of Fine-Grain Yttrium-Based Phosphors by Sol-Gel Process,' J. Electrochem. Soc., 143, 189-196(1996) https://doi.org/10.1149/1.1836407
  6. Pan, Y., Su, Q., Xu, H., Chen, T., Ge, W., Yang, C. and Wu, M., 'Synthesis and Red Luminescence of $Pr^{3+}-doped\;CaTiO_3$ Nanophosphor from Polymer Precursor,' J. Solid State Chem., 174(1), 69-73(2003) https://doi.org/10.1016/S0022-4596(03)00175-0
  7. Oing, S., Barthou, C., Denis, J. P., Pelle, F. and Blanzat, B., 'Luminescence and Energy Transfer in $Y_2O_3$ CO-doped with $Bi^{3+}\;and\;Eu^{3+}$,' J. Lumin., 28(1), 1-11(1983) https://doi.org/10.1016/0022-2313(83)90021-2
  8. Villalobos, G., Leclerq, O., Paris, H. and Summers, C. J., 'Controlling the Size and Shape of Co-Precipitated $Y_2O_3$:Eu Phosphors,' Ext. Abs. 3rd Int 1 Conf. Sci. & Tech. Display Phosphors, pp. 253, Huntington Beach, CA(1997)
  9. Bihari, B., Eilers, H. and Tissue, B. M., 'Spectra and Dynamics of Monoclinic $Eu_2O_3\;and\;Eu^{3+}: Y_2O_3$ Nanocrystals,' J. Lumin., 75(1), 1-10(1997) https://doi.org/10.1016/S0022-2313(97)00102-6
  10. Xu, C., Wakins, B. A., Sievers, R. E., Jing, X., Trowga, P., Gibbons, C. S. and Vecht, A., 'Spectra and Dynamics of Monoclinic $Eu_2O_3\;and\;Eu^{3+}:Y_2O_3$ Nanocrystals,' Appl. Phys. Lett., 71, 1643-1645(1997) https://doi.org/10.1063/1.120004
  11. Roh, H. S., Kim, E. J., Kang, H. S., Kang, Y. C., Park, H. D. and Park, S. B., 'Vacuum Ultraviolet Characteristics of Nano-sized $Gd_2O_3$:Eu Phosphor Particles,' Jpn. J. Appl. Phys., 42(5A), 2741-2745(2003) https://doi.org/10.1143/JJAP.42.2741
  12. Kang, Y. C., Roh, H. S. and Park, S. B., 'Preparation of $Y_2O_3$:Eu Phosphor Particles of Filled Morphology at High Precursor Concentrations by Spray Pyrolysis,' Adv. Mat., 12(6), 451-453(2000) https://doi.org/10.1002/(SICI)1521-4095(200003)12:6<451::AID-ADMA451>3.0.CO;2-S
  13. Kim, E. J., Kang, Y. C., Park, H. D. and Ryu, S. K., 'UV and VUV Characteristics of $(YGd)_2O_3$:Eu Phosphor Particles Prepared by Spray Pyrolysis from Polymeric Precursors,' Mater. Res. Bull., 38, 515-524(2003) https://doi.org/10.1016/S0025-5408(02)01047-4
  14. Kang, Y. C., Roh, H. S. and Park, S. B., 'Use of LiCl Flux in the Preparation of $Y_2O_3$:Eu Phosphor Particles by Spray Pyrolysis,' J. Eur. Ceram. Soc., 22, 1661-1665(2002) https://doi.org/10.1016/S0955-2219(01)00462-9