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Particle fusion method and application of perovskite CsPbBr3 colloidal quantum dots

A technology of colloidal quantum dots and fusion method, which is applied in the field of particle fusion of perovskite CsPbBr3 quantum dots, can solve the problem that the quenching effect is not as good as the defect state between bands, and achieve good luminescence peak position and great application prospects

Pending Publication Date: 2021-01-08
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Electrons or holes in the in-band defect state have the opportunity to return to the band edge, so the quenching effect on the intrinsic emission of the quantum dot is not as good as that of the inter-band defect state

Method used

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  • Particle fusion method and application of perovskite CsPbBr3 colloidal quantum dots
  • Particle fusion method and application of perovskite CsPbBr3 colloidal quantum dots
  • Particle fusion method and application of perovskite CsPbBr3 colloidal quantum dots

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Embodiment 1

[0061] This embodiment is used to illustrate perovskite CsPbBr of the present invention 3 Particle fusion method for colloidal quantum dots.

[0062] (1) Preparation of transmission electron microscope microgrid samples by drop coating method: first, use a pipette gun to absorb CsPbBr dispersed in n-hexane 3 1ml of quantum dots (concentration: 10mg / ml) was dropped into 1000ml of n-hexane solution and diluted to 0.1mg / ml.

[0063] (2) Put the transmission electron microscope microgrid into the Gatan plasma cleaning machine, use H 2 1. Cleaning in Ar gas mode for 1 min to remove organic dirt on the surface and avoid its influence on the experimental results. The aperture of the transmission electron microscope micro-grid is 5-20 microns, preferably 5-15 microns, and the thickness of the carbon skeleton of the micro-grid is 10-50 nanometers, preferably 10-20 nanometers. The TEM microgrid used in this embodiment has an aperture of 100 microns.

[0064] (3) CsPbBr dispersed in ...

Embodiment 2

[0071] This embodiment is used to illustrate perovskite CsPbBr of the present invention 3 Particle fusion method for colloidal quantum dots.

[0072] (1) Preparation of transmission electron microscope microgrid samples by drop coating method: first, use a pipette gun to absorb CsPbBr dispersed in n-hexane 3 1ml of quantum dots (concentration: 10mg / ml) was dropped into 1000ml of n-hexane solution and diluted to 0.1mg / ml.

[0073] (2) Put the transmission electron microscope microgrid into the Gatan plasma cleaning machine, use H 2 1. Cleaning in Ar gas mode for 1 min to remove organic dirt on the surface and avoid its influence on the experimental results. The aperture of the transmission electron microscope micro-grid is 5-20 microns, preferably 5-15 microns, and the thickness of the micro-grid carbon skeleton is 10-50 nanometers, preferably 10-20 nanometers. The TEM microgrid used in this embodiment has an aperture of 100 microns.

[0074] (3) CsPbBr dispersed in n-hexan...

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Abstract

The invention provides a particle fusion method and application of perovskite CsPbBr3 colloidal quantum dots. The particle-controllable particle size distribution and the internal interface atom structure of the perovskite quantum dot particles are obtained through the method; guiding significance for defect control engineering of quantum dot light emitting diodes are achieved; and the method hasgreat application prospects in the fields of quantum dot light emitting devices, perovskite solar cell films and the like.

Description

technical field [0001] The present invention relates to the field of materials. Specifically, the present invention relates to a perovskite CsPbBr 3 Particle fusion method and application of quantum dots. Background technique [0002] With the development of the times and the advancement of science and technology in the 21st century, material science plays an increasingly important role. Among them, about 1 / 5 of the total human power generation is used for various forms of lighting, such as fluorescent lamps, mobile phones, computers, TV screens, LED advertising screens, etc. However, the traditional liquid crystal display cannot meet people's needs for energy saving, emission reduction and wider color gamut, so under this background, people urgently need to develop a new generation of light emitting devices. [0003] Semiconductor colloidal quantum dots, as a member of nanomaterials, have received widespread attention because of their unique optical properties. Quantum d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/00C09K11/66B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G21/006C01P2004/04C01P2004/64C09K11/665
Inventor 刘欣宇王建林白雪冬
Owner INST OF PHYSICS - CHINESE ACAD OF SCI