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Improved cathodoluminescent characteristics of Y2O3:Eu3+ thin films by Li-doping

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Abstract

Y2O3:Eu3+ luminescent thin films have been studied as a potential red phosphor thin film for application in field emission display. Y2O3:Eu3+ and Li-doped Y2O3:Eu3+ films have been grown on Al2O3(0001) substrates using a pulsed laser deposition technique at substrate temperature of 600 °C under the various oxygen pressures. The cathodoluminescent intensity of the Y2O3:Eu3+ films were highly dependent not only on the crystallinity, but also on the surface roughness of the films. Cathodoluminescent spectra for both Y2O3:Eu3+ and Li-doped Y2O3:Eu3+ films were dominated by the red emission peak at 612 nm radiated by the transition of 5D0-7F2 within europium and the brightness of the Li-doped films was increased by a factor of 1.4 in comparison with that of the Y2O3:Eu3+ films. It is understood that Li ions affect the luminescence of the Y2O3:Eu3+ films by influencing its crystallinity and surface roughness. The cathodoluminescent intensity and surface roughness had similar behavior as a function of oxygen pressure.

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Authors and Affiliations

  1. Department of Photonics, Sillia University, Busan, 617-736, South Korea

    S.S. Yi

  2. Department of Physics, Pukyong National University, Busan, 608-737, South Korea

    K.S. Shim, H.K. Yang, B.K. Moon, B.C. Choi & J.H. Jeong

  3. Department of Physics, Dong Eui University, Busan, 614-714, South Korea

    J.H. Kim

  4. Busan Center Korea Basic Science Institute, Busan, 609-737, South Korea

    J.S. Bae

Authors
  1. S.S. Yi
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  2. K.S. Shim
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  3. H.K. Yang
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  4. B.K. Moon
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  5. B.C. Choi
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  6. J.H. Jeong
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  7. J.H. Kim
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  8. J.S. Bae
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Correspondence to J.H. Jeong.

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PACS

78.20.-e; 78.55.-m; 78.66.-w

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Yi, S., Shim, K., Yang, H. et al. Improved cathodoluminescent characteristics of Y2O3:Eu3+ thin films by Li-doping. Appl. Phys. A 87, 667–671 (2007). https://doi.org/10.1007/s00339-007-3945-5

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  • DOI: https://doi.org/10.1007/s00339-007-3945-5

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