Prospectives of Industrial Chemistry (공업화학전망)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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High-resolution Patterning of Colloidal Quantum Dots via Non-destructive, Light-driven Ligand Crosslinking

양자점용 가교제를 이용한 고해상도 양자점 광패터닝 기술

  • Yang, Jeehye (Department of Chemical and Biomolecular Engineering, Sogang University) ;
  • Kang, Moon Sung (Department of Chemical and Biomolecular Engineering, Sogang University)
  • 양지혜 (서강대학교 화공생명공학과) ;
  • 강문성 (서강대학교 화공생명공학과)
  • Published : 2020.12.31

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Abstract

최근 우수한 발광 특성을 갖는 양자점을 고해상도 디스플레이의 발광 소재로 도입하고자 하는 노력이 활발하다. 양자점을 활용한 디스플레이의 실현을 위해서는 콜로이드 상태인 다색의 양자점을 고해상도로 패터닝하는 기술의 확립이 필요하다. 본 연구에서는 ethane-1,2-diyl bis(4-azido-2,3,5,6-tetrafluorobenzoate)를 양자점용 가교제로 활용하여 용액공정을 기반으로 형성된 양자점 박막을 고해상도로 패터닝한 기술을 소개하고자 한다. 위 양자점용 가교제의 양 말단에는 아지드 그룹을 포함한 작용기가 존재한다. 아지드 기는 자외선에 의해 광 활성화되어 양자점 표면의 알킬 리간드와 가교 결합을 형성함으로써, 양자점 박막에 화학적 내구성을 부여한다. 본 기술을 기반으로, 적색, 녹색, 청색의 카드뮴 기반 양자점을 고해상도로 패터닝하고 정밀하게 배열하여 인치 당 화소 수 1400 이상의 픽셀 형성에 성공하였다. 또한 가교 반응 후에도 성능 저하가 없는 양자점 박막 및 자발광 양자점 다이오드를 개발하였다.

Keywords

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