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  • 09월 10일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Stable CsPbX3/CsPb2br5 Core/Shell Perovskite Nanocubes for Wide-Color-Gamut LCDs

등록일
2019년 8월 28일 16시 17분 35초
접수번호
1715
발표코드
INOR.P-111 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 17일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Inorganic Chemistry
저자 및
공동저자
Hyeongjin Lee, Minji Ko, Young rag Do*
Department of Applied Chemistry, Kookmin University, Korea
Quantum dots (QDs) are promising materials for displays due to their good photoluminescent properties, such as their high photo-luminescent quantum yield (PLQY) and easy color tunability. Specifically, perovskite nanocubes are most promising because they have very narrow full-width-at-half-maximum (FWHM), a very high PLQY, and easy color tunability. They are also easy to synthesize. However, perovskite nanocubes are associated with problems related to their stability depending on UV exposure and on the humidity and temperature. If we solve these problems, perovskite nanocubes can be used for very wide-color-gamut liquid crystal displays (LCDs). Here, we synthesized stable CsPbX3/CsPb2br5 core/shell perovskite nanocubes and fabricated wide-color-gamut LCDs. The PLQYs of the green (G) and red (R) core/shell perovskite nanocubes synthesized in this study are ~77.4% and ~78.9%, respectively. The enhanced stability of the perovskite nanocubes against certain UV, humidity and heat conditions allows perovskite nanocube film to be applied to color-converting materials of LCDs. The conversion efficiency rates of a perovskite-nanocube emissive LCD consisting of G and R perovskite nanocube films sandwiched in the form of a recycling bottom layer and a blue-filtering top dichroic filter are 42.0% and 44.3%, respectively. The color gamut was enlarged to 134% compared to the NTSC standard. The GR colloidal perovskite nanocubes and the fabricated perovskite nanocube films were analyzed by TEM, XRD, and EDX in terms of their structural properties and by PL and EL with an integrating sphere with regard to their optical properties.

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