Preparation method for co-doped type and separately-coded type ZnInS/ZnS dual-emitter quantum dot

A quantum dot and dual-emission technology, which is applied in the fields of chemistry and nanomaterials, can solve problems such as the limitation of peak position mobility, and achieve the effects of flexible regulation, convenient raw material supply, and simple equipment

Inactive Publication Date: 2015-10-21
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for creation of small particles that emit strong yellowish green or red colors when excited from UV rays. These tiny crystals are made up mostly of zinc sulfide - silver mixed together at specific ratios. They show excellent properties like flexibility, controllability over different wavelength ranges, high efficiency in converting electromagnetic radiation into other forms of energy such as heat, electricity, sound waves etc., which makes them ideal substances used in various applications including optoelectronics devices, sensors, displays, biomedical imagings, solar cells, lasers, LED lights, batteries, catalysts, medicine, photovoltaic panels, electron microscopes, medical diagnoses, environmental monitoring, security systems, and military purposes.

Problems solved by technology

The technical problem addressed in this patents relates to developing an improved version of Quantum Dot containing both red green and yellowish colors while also having superior performance compared to existing versions.

Method used

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  • Preparation method for co-doped type and separately-coded type ZnInS/ZnS dual-emitter quantum dot
  • Preparation method for co-doped type and separately-coded type ZnInS/ZnS dual-emitter quantum dot
  • Preparation method for co-doped type and separately-coded type ZnInS/ZnS dual-emitter quantum dot

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Embodiment

[0029] The AgNO used in this example 3 , Zn(O A ) 2 , In(O A ) 3 , Mn(O A ) 2 , S powder and other raw materials are analytical reagents, the solvent is oleylamine (OAm), and the ligand is DDT. The glass instruments used are rinsed with deionized water three times before use and then vacuum-dried. Quantum dots were prepared according to the following steps:

[0030] 1. Preparation of S precursor: Dissolve 10mmol S in 10ML OAm, then heat to 50°C, dissolve it under ultrasonic conditions, and finally add 10MLODE to dilute to make a 0.5mmol / ML S precursor solution;

[0031] 2. Preparation of Zn precursor: 8mmol Zn(O A ) 2 Dissolve in a mixture of 16ML OAm and 4MLODE, then stir for two hours at a temperature of 50°C to dissolve;

[0032] 3. Preparation of Mn precursor: 0.1mmmol Mn(O A ) 2 Dissolve it in 10ML OAm, and then heat it to 50°C under the protection of nitrogen to dissolve it, and prepare a 0.001mmol / ML Mn precursor solution.

[0033] 4. Preparation of white li...

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Abstract

The invention discloses a preparation method for a co-doped type and separately-coded type ZnInS/ZnS dual-emitter quantum dot. The preparation method comprises preparation of white-light emitting ZnInS:Ag/ZnS/ZnS:Mn/ZnS and ZnInS:Ag & Mn/ZnS/ZnS/ZnS nano materials, wherein by adopting a core-shell structure, the ZnInS:Ag/ZnS/ZnS:Mn/Zn nano material is synthesized by the following steps of: (1) preparing a color-adjustable ZnInS: Ag core; (2) carrying out core-covering on a first molar layer ZnS; and (3) adsorbing Mn ions and carrying out cover-covering on second and third molar layers; and for the preparation of the ZnInS:Ag & Mn/ZnS/ZnS/ZnS nano material, injecting time of a Mn precursor in the step (3) is advanced to injecting time of an S precursor in the step (1). The preparation method adopts a single-pot thermal injection process, is simple in process, easy to operate, capable of being completed in common chemical laboratories, and easy to popularize; and raw materials are convenient to supply, and are low in price.

Description

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Claims

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Application Information

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Owner SOUTHEAST UNIV
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