한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제36권6호
  • /
  • Pages.582-587
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  • 2023
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  • 1226-7945(pISSN)
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  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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열처리 온도가 SrWO4:Sm3+ 박막의 구조, 표면, 발광 특성에 미치는 효과

Effects of Annealing Temperature on the Structural, Morphological, and Luminescent Properties of SrWO4:Sm3+ Thin Films

  • Shinho Cho (Department of Batteries Science and Engineering, Silla University)
  • 투고 : 2023.07.16
  • 심사 : 2023.08.14
  • 발행 : 2023.11.01
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초록

The effects of the annealing temperature on the structural, morphological, and luminescent properties of SrWO4:Sm3+ thin films grown on quartz substrates by radio-frequency magnetron sputtering were investigated. The thin films were annealed at various annealing temperatures for 20 min in a rapid thermal annealer after growing the thin films. The experimental results showed that the annealing temperature has a significant effect on the properties of the SrWO4:Sm3+ thin films. The crystal structure of the as-grown SrWO4:Sm3+ thin films was transformed from amorphous to crystalline after annealing at 800℃. The preferred orientation along (112) plane and a significant increase in average grain size by 820 nm were observed with increasing the annealing temperature. The average optical transmittance in the wavelength range of 500~1,100 nm was decreased from 72.0% at 800℃ to 44.2% at an annealing temperature of 1,000℃, where the highest value in the photoluminescence intensity was obtained. In addition to the red-shift of absorption edge, a higher annealing temperature caused the optical band gap energy of the SrWO4:Sm3+ thin films to fall rapidly. These results suggest that the structural, morphological, and luminescent properties of SrWO4:Sm3+ thin films can be controlled by varying annealing temperature.

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참고문헌

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