18074570. CADMIUM-FREE QUANTUM DOTS, AND COMPOSITE AND DISPLAY DEVICE INCLUDING THE SAME simplified abstract (Samsung Electronics Co., Ltd.)

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CADMIUM-FREE QUANTUM DOTS, AND COMPOSITE AND DISPLAY DEVICE INCLUDING THE SAME

Organization Name

Samsung Electronics Co., Ltd.

Inventor(s)

Hyeyeon Yang of Suwon-si (KR)

Garam Park of Seoul (KR)

Shin Ae Jun of Seongnam-si (KR)

Tae Gon Kim of Hwaseong-si (KR)

Taekhoon Kim of Hwaseong-si (KR)

CADMIUM-FREE QUANTUM DOTS, AND COMPOSITE AND DISPLAY DEVICE INCLUDING THE SAME - A simplified explanation of the abstract

This abstract first appeared for US patent application 18074570 titled 'CADMIUM-FREE QUANTUM DOTS, AND COMPOSITE AND DISPLAY DEVICE INCLUDING THE SAME

Simplified Explanation

The patent application describes a quantum dot that emits green light and is cadmium-free. The quantum dot has a multi-component core consisting of two semiconductor nanocrystals, one containing indium, zinc, and phosphorus, and the other containing gallium and phosphorus. The ratios of phosphorus to indium and gallium are specified within certain ranges.

  • The quantum dot emits green light and does not contain cadmium.
  • It has a multi-component core consisting of two semiconductor nanocrystals.
  • The first nanocrystal contains indium, zinc, and phosphorus.
  • The second nanocrystal contains gallium and phosphorus.
  • The mole ratio of phosphorus to indium is between 0.6:1 and 1.0.
  • The mole ratio of phosphorus to the sum of indium and gallium is between 0.5:1 and 0.8:1.
  • A quantum dot-polymer composite pattern is also included in the patent application.
  • The technology can be used in display devices.

Potential Applications

  • Display devices
  • Lighting applications
  • Photovoltaics
  • Biological imaging

Problems Solved

  • Eliminates the use of cadmium, which is toxic and environmentally harmful.
  • Provides a quantum dot that emits green light, expanding the color range available for display devices and lighting applications.
  • Offers a cadmium-free alternative for various applications.

Benefits

  • Environmentally friendly due to the absence of cadmium.
  • Expanded color range for display devices and lighting applications.
  • Improved safety and reduced health risks associated with cadmium-containing quantum dots.


Original Abstract Submitted

A quantum dot including a multi-component core including a first semiconductor nanocrystal including indium (In), zinc (Zn), and phosphorus (P) and a second semiconductor nanocrystal disposed on the first semiconductor nanocrystal, the second semiconductor nanocrystal including gallium (Ga) and phosphorus (P) wherein the quantum dot is cadmium-free and emits green light, a mole ratio (P:In) of phosphorus relative to indium is greater than or equal to about 0.6:1 and less than or equal to about 1.0, and a mole ratio (P:(In+Ga)) of phosphorus relative to indium and gallium is greater than or equal to about 0.5:1 and less than or equal to about 0.8:1, a quantum dot-polymer composite pattern including the same, and a display device.

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