Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Dy co-doping effect on photo-induced current properties of Eu-doped SrAl2O4 phosphor

Eu 도핑 SrAl2O4 형광체의 광 여기 전류 특성에 대한 Dy 코-도핑 효과

  • Kim, Sei-Ki (Electronic Materials Lab., Korea Institute of Ceramic Engineering & Technology)
  • Published : 2009.01.31
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Abstract

$Eu^{2+}$-doped ${SrAl_2}{O_4}$ and $Eu^{2+}$, $Dy^{3+}$ co-doped ${SrAl_2}{O_4}$ phosphors have been synthesized by conventional solid state method. Photocurrent properties of $Eu^{2+}$ doped ${SrAl_2}{O_4}$ and $Eu^{2+}$, $Dy^{3+}$ co-doped ${SrAl_2}{O_4}$ phosphors, in order to elucidate $Dy^{3+}$ co-doping effect, during and after ceasing ultraviolet-ray (UV) irradiation have been investigated. The photocurrent of $Eu^{2+}$, $Dy^{3+}$ co-doped ${SrAl_2}{O_4}$ phosphors during UV irradiation was 4-times lower than that of $Eu^{2+}$-doped ${SrAl_2}{O_4}$ during UV irradiation, and 7-times higher than that of $Eu^{2+}$-doped ${SrAl_2}{O_4}$ after ceasing UV irradiation. The photocurrent results indicated that holes of charge carriers captured in hole trapping center during the UV irradiation and liberated after-glow process, and made clear that $Dy^{3+}$ of co-dopant acted as a hole trap. The photocurrent of ${SrAl_2}{O_4}$ showed a good proportional relationship to UV intensity in the range of $1{\sim}5mW/cm^2$, and $Eu^{2+}$-doped ${SrAl_2}{O_4}$ was confirmed to be a possible UV sensor.

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References

  1. F .C. Palilla, A. K. Levine, and M. R. Tomkus, J. Electrochem. Soc., vol. 115, p. 643, 1968
  2. V. Abbruscato, 'Optical and electrical properties of $SrAl_{2}O_{4}:Eu^{2+}$', J. Electrochem., vol. 118, p. 930, 1971 https://doi.org/10.1149/1.2408226
  3. T. Matsuzawa, Y. Aoki, N. Takeuchi, and Y. Murayama, 'A new long phosphorescent phosphor with high brightness, $SrAl_{2}O_{4}:Eu^{2+}$, $Dy^{3+}$', J. Electrochem. Soc., vol. 143, pp. 2670-2673, 1996 https://doi.org/10.1149/1.1837067
  4. Y. Lin, Z. Zhang, F. Zhang, Z. Tang, and Q. Chen, 'Preparation of the ultrafine $SrAl_{2}O_{4}:Eu$,Dy needle-like phosphor and its optical properties', Mat. Chem. and Phys., vol. 65, pp. 103-106, 2000 https://doi.org/10.1016/S0254-0584(00)00222-4
  5. Z. Liu, Y. Li, Y. Xiong, D. Wang, and Q. Yin, 'Electroluminescence of $SrAl_{2}O_{4}:Eu^{2+}$ phosphor', Microelectronics Journal, vol. 35, pp. 375-377, 2004 https://doi.org/10.1016/S0026-2692(03)00249-0
  6. J. Holsa, H. Jungner, M. Lastusaari, and J. Niittykoski, 'Persistent luminescence of $Eu^{2+}$ doped alkaline earth aluminates, $MAl_{2}O_{4}:Eu^{2+}$', J. Alloys and Compounds, vol. 323-324, pp. 326-330, 2001 https://doi.org/10.1016/S0925-8388(01)01084-2
  7. M. Ohta, M. Maruyama, T. Hayakawa, and T. Nishijo, 'Role of dopant on long- lasting phosphor of strontium aluminate', J. Ceram. Soc. Jpn, vol. 108, no. 3, pp. 284-289, 2000 https://doi.org/10.2109/jcersj.108.1255_284
  8. M. Kamada, J. Murakami, and N. Ohno, 'Excitation spectra of a long-persistent phosphor $SrAl_{2}O_{4}:Eu$,Dy in vacuum ultraviolet region', J. Lumin., vol. 87-89, pp. 1042-1044, 2000 https://doi.org/10.1016/S0022-2313(99)00533-5
  9. T. Nakamura, K. Kaiya, N. Takahashi, C.C. Rowlands, V. Beltran-Lopez, G. M. Smith, and P.C. Riedi, 'High frequency EPR of europium-doped strontium aluminate phosphor', J. Mat. Chem., vol. 10, pp. 2566-2569, 2000 https://doi.org/10.1039/b004061o
  10. K. Kato, I. Tsutai, T. Kamimura, F. Kaneko, K. Shinbo, M. Ohta, and T. Kawakami, 'Thermoluminescence properties of SrAl2O4:Eu sputtered films with long phosphorescence', J. Lumin., vol. 82, pp. 213-220, 1999 https://doi.org/10.1016/S0022-2313(99)00036-8
  11. D. Wang, Q. Yin, Y. Li, and M. Wang, 'Influence of $B_{2}O_{3}$ on matrix forming process and luminescent properties of $SrO{\cdot}Al_{2}O_{3}:Eu_{2+}$ phosphor', J. Electrochem. Soc., vol. 149, no. 3, H65-H67, 2002 https://doi.org/10.1149/1.1445173
  12. H. B. Yuan, W. Jia, S. A. Basun, L. Lu, R. S. Meltzer, and W. M. Yen, 'The long-persistent photoconductivity of $SrAl_{2}O_{4}:Eu^{2+}, $Dy^{3+} single crystals', J. Electrochem. Soc., vol. 147, pp. 3154-3156, 2000 https://doi.org/10.1149/1.1393875
  13. H. Yamamoto and T. Matsuzawa, 'Mechanism of long phosphorescence of $SrAl_{2}O_{4}:Eu^{2+}$, $Dy^{3+}$, and $CaAl_{2}O_{4}:Eu^{2+}$,$Nd^{3+}$, ', J. Lumin., vol. 72-74, pp. 287-289, 1997 https://doi.org/10.1016/S0022-2313(97)00012-4
  14. E. Nakazawa and T. Mochida, 'Traps in $SrAl_{2}O_{4}:Eu^{2+}$ phosphor with rare-earth ion doping', J. Lumin., vol. 72-74, pp. 236-237, 1997 https://doi.org/10.1016/S0022-2313(97)00043-4
  15. W. Jia, H. Yuan, L. Lu, H. Liu, and W. M. Yen, 'Phosphorescent dynamics in $SrAl_{2}O_{4}:Eu^{2+}$, $Dy^{3+}$single crystal fibers', J. Lumin., vol. 76-77, pp. 424-428, 1998 https://doi.org/10.1016/S0022-2313(97)00230-5