QUANTUM DOTS AND AN ELECTRONIC DEVICE INCLUDING THE SAME

Provided are quantum dots and an electroluminescent device including the same. The quantum dots do not contain heavy metals such as lead, cadmium, and mercury, thereby being eco-friendly. The quantum dots comprise: a core including a first semiconductor nanocrystal with a Group III-V compound; and a...

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Main Authors CHUNG, HEE JAE, CHO, OUL, JANG, EUN JOO, KIM, TAE HYUNG, WON, YU HO
Format Patent
LanguageEnglish
Korean
Published 15.04.2021
Subjects
ADHESIVES
BASIC ELECTRIC ELEMENTS
CHEMISTRY
DYES
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
SEMICONDUCTOR DEVICES
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Summary:Provided are quantum dots and an electroluminescent device including the same. The quantum dots do not contain heavy metals such as lead, cadmium, and mercury, thereby being eco-friendly. The quantum dots comprise: a core including a first semiconductor nanocrystal with a Group III-V compound; and a shell disposed on the core and including a semiconductor nanocrystal with a Group II-VI compound, wherein the quantum dots do not contain cadmium. The shell comprises: a first layer disposed directly on the core and including a second semiconductor nanocrystal with zinc and selenium; a second layer disposed on an outermost layer of the shell and including a third semiconductor nanocrystal with zinc and sulfur; and a third layer disposed between the first layer and the second layer and having a fourth semiconductor nanocrystal with zinc, selenium, and optionally sulfur, wherein a difference between a peak emission wavelength of a colloidal solution of the quantum dots and a peak emission wavelength of a film prepared from the colloidal solution is less than or equal to 5 nanometers (nm). III-V족 화합물을 포함하는 제1 반도체 나노결정을 포함하는 코어, 및 상기 코어 위에 배치되며 II-VI족 화합물을 포함하는 반도체 나노결정을 포함하는 쉘을 포함하는 양자점으로서, 상기 양자점은 카드뮴을 포함하지 않고, 상기 쉘은 상기 코어 바로 위에 배치되고 아연 및 셀레늄을 포함하는 제2 반도체 나노결정을 포함하는 제1 층, 상기 쉘의 최외각에 배치되고 아연 및 황을 포함하는 제3 반도체 나노결정을 포함하는 제2층, 그리고 상기 제1층과 제2층 사이에 배치되며 아연과 셀레늄, 및 선택에 따라 황을 포함하는 제4 반도체 나노결정을 포함하는 제3층을 포함하며, 상기 양자점의 콜로이드 용액의 발광 피크 파장과, 상기 콜로이드 용액으로부터 제조된 박막의 발광 피크 파장의 차가 5 nm 이하인 양자점, 및 이를 포함하는 전계발광소자를 제공한다.
Bibliography:Application Number: KR20190123995