Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Fabrication of ATO thin film for IR-cut off by sol-gel method

솔-젤 법에 의한 적외선 차단 ATO 박막 제조

  • Kim, Jin-Ho (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Team) ;
  • Lee, Kwang-Hee (DO Co., Ltd.) ;
  • Lee, Mi-Jai (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Team) ;
  • Hwang, Jonghee (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Team) ;
  • Lim, Tae-Young (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Team)
  • 김진호 (한국세라믹기술원 광.디스플레이소재센터) ;
  • 이광희 (디오) ;
  • 이미재 (한국세라믹기술원 광.디스플레이소재센터) ;
  • 황종희 (한국세라믹기술원 광.디스플레이소재센터) ;
  • 임태영 (한국세라믹기술원 광.디스플레이소재센터)
  • Received : 2013.09.16
  • Accepted : 2013.10.08
  • Published : 2013.10.31
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Abstract

IR cut-off thin films consisted of ATO nanoparticles were successfully fabricated by sol-gel method. The coating solution was synthesized with organic/inorganic hybrid binder and ATO colloidal solution and ATO thin films were coated on a slide glass with the withdrawal speed of 5~40 mm/s. As the withdrawal speed increased from 5 mm/s to 40 mm/s, the thickness of coating thin films also increased from $1.05{\mu}m$ to $4.25{\mu}m$ and the IR cut-off in wavelength of 780~2500 nm increased from 49.5 % to 66.7 %. In addition, the pencil hardness of ATO thin films dried at $80^{\circ}C$ was ca. 5H and the coating films were not removed after a cross cutter tape test because of the hybrid binder synthesized with tetraethylorthosilicate and methyltrimethoxysilane. The surface morphologies, optical properties and film thickness of prepared thin films with a different withdrawal speed were measured by field emission scanning electron microscope (FE-SEM), UV-Vis spectrophotometer, and Dektak.

ATO 나노 입자들로 구성된 적외선 차단 박막이 솔-젤 법에 의해 성공적으로 제조되었다. 코팅액은 유무기 하이브리드 바인더와 콜로이드 ATO 용액으로 합성되었고 ATO 박막은 슬라이드 유리기판에 5~40 mm/s의 인상속도로 코팅되었다. 인상속도가 5 mm/s에서 40 mm/s로 증가함에 따라 코팅막의 두께 또한 $1.05{\mu}m$에서 $4.25{\mu}m$로 증가하였다. 그리고 파장 780 nm에서 2500 nm에서의 적외선 차단율은 49.5 %에서 66.7 %로 증가하였다. 또한 $80^{\circ}C$에서 건조된 ATO 박막의 연필경도 값은 5H를 나타내었고 tetraethylorthosilicate와 methyltrimethoxysilane을 합성한 하이브리드 바인더의 영향으로 테이프테스트 후 코팅막은 벗겨지지 않았다. 서로 다른 인상속도에 의해 제조된 박막의 표면구조, 광학적 특성 그리고 박막두께는 FE-SEM, UV-Vis-NIR 분광기 그리고 Dektak에 의해 측정되었다.

Keywords

References

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