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

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis of Highly Bright Green Zn-Ag-In-S/Zn-In-S/ZnS Quantum Dots for White Down-Converted LEDs with a High CRI

등록일
2019년 8월 28일 16시 17분 34초
접수번호
1694
발표코드
INOR.P-105 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 17일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Inorganic Chemistry
저자 및
공동저자
Minji Ko, Seoyeon Shin, Hyeongjin Lee1, Young rag Do2,*
Department of Chemistry, Kookmin University, Korea
1Department of Applied Chemistry, Kookmin University, Korea
2Department of Bionano Chemistry, Kookmin University, Korea
We synthesized highly bright green Zn-Ag-In-S/Zn-In-S/ZnS (ZAIS/ZIS/ZnS) quantum dots (QDs) to realize white down-converted light-emitting diodes (DC-LEDs) with a high color rendering index (CRI, Ra). To enhance the photoluminescence quantum yield (PLQY), we used a high concentration of zinc acetate dihydrate, which is capable of causing the formation of a Zn-In-S inner-shell. The obtained ZAIS/ZIS/ZnS showed a high PLQY of 0.84 with a peak wavelength of 511 nm. We also confirmed the formation of Zn-In-S via X-ray diffractometry and Raman spectroscopy. Furthermore, we fabricated synthesized green ZAIS/ZIS/ZnS , red ZCIS/ZnS QDs, and a cup-type blue InGaN LED to realize multi-packaged white down-converted LEDs with a high CRI. The multi-packaged white DC-LEDs exhibit a high luminous efficacy (LE) value of 76 lm/W at an applied current of 180 mA and a CRI of 91.

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