Journal of Ceramic Processing Research

Ceramic Processing Research Center (한양대학교 세라믹연구소)
권호 표지

Investigation of thermal annealing effects on the optical transparency and luminescent characteristics of Eu-doped Y2O3 thin films

  • Chung, Myun Hwa (Department of Advanced Materials Engineering, Chungbuk National University) ;
  • Kim, Joo Han (Department of Advanced Materials Engineering, Chungbuk National University)
  • Received : 2019.04.30
  • Accepted : 2019.07.24
  • Published : 2019.08.01

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Abstract

The thermal annealing effects on the optical transparency and luminescent characteristics of the Eu-doped Y2O3 thin films have been investigated. The as-deposited Y2O3:Eu films exhibited an optical band gap of 5.78 eV with a transparency of 89 % at a wavelength of 550 nm. As the annealing temperature increased from 1000 to 1300 ℃, the optical band gap and transparency of the films decreased from 5.77 to 4.91 eV and from 86.8 to 64.5 % at 550 nm, respectively. The crystalline quality of the films was improved with increasing annealing temperature. The annealed Y2O3:Eu films emitted a red-color photoluminescence (PL) with the highest emission peak near 612 nm. The PL intensity was increased with increasing annealing temperature to 1200 ℃, resulting from the improvement in the crystalline quality of the films. The PL intensity was decreased with further increasing temperature above 1200 ℃ due to the formation of Y2SiO5 phase by the reaction of the film with the quartz substrate.

Keywords

References

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