Quantum dots and devices including the same
AssigneeSamsung Electronics Co., Ltd.
InventorsJihyun Min, Eun Joo Jang, Yuho Won, Hyo Sook Jang
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Abstract
A cadmium free quantum dot including a core including a first semiconductor nanocrystal, and a semiconductor nanocrystal shell disposed on the core, a composition of the semiconductor nanocrystal shell being different from a composition of the first semiconductor nanocrystal, a production method thereof, and a device including the same are disclosed. The semiconductor nanocrystal shell includes a zinc chalcogenide, the zinc chalcogenide includes selenium, tellurium, sulfur, or a combination thereof, and the quantum dot further alkaline an alkaline earth metal.
Claims24
A quantum dot comprising
- a core comprising a first semiconductor nanocrystal, and
- a semiconductor nanocrystal shell disposed on the core, a composition of the semiconductor nanocrystal shell being different from a composition of the first semiconductor nanocrystal,
- wherein the quantum dot does not comprise cadmium,
- wherein the semiconductor nanocrystal shell comprises a zinc chalcogenide,
- wherein the zinc chalcogenide comprises selenium, tellurium, sulfur, or a combination thereof,
- wherein the quantum dot further comprises an alkaline earth metal,
- wherein the first semiconductor nanocrystal does not comprise an indium phosphide,
- wherein the first semiconductor nanocrystal comprises zinc, tellurium, and selenium,
- wherein in the quantum dot, a mole ratio of tellurium with respect to selenium is greater than 0:1 and less than or equal to about 0.1:1, and
- wherein in the quantum dot, an amount of the alkaline earth metal is greater than or equal to about 0.001 moles and less than or equal to 0.5 moles, per one mole of zinc.
Dependencies are inferred from the claim text.