Title:
METHOD FOR SYNTHESIZING HIGH-QUALITY COLLOIDAL CADMIUM-FREE QUANTUM DOTS
Document Type and Number:
WIPO Patent Application WO/2017/067451
Kind Code:
A1
Abstract:
Disclosed is a method for synthesizing high-quality cadmium-free quantum dots. Dissolving a copper source, an indium source and a sulfur source in liquid paraffin and heating to 100-150°C to obtain a copper indium precursor liquid; applying a vacuum and repeatedly introducing nitrogen; in an atmospheric environment or under the protection of an inert atmosphere, continuing to heat to 180-260°C then maintaining heat to obtain a core quantum dot solution; dissolving a zinc source in liquid paraffin and heating to 100-200°C to obtain a zinc precursor liquid; at that temperature, injecting the zinc precursor liquid into the core quantum dot solution; raising the temperature to 180-260°C then maintaining heat to obtain a core-shell structure quantum dot solution; purifying the core-shell structure quantum dot solution to obtain finished core-shell structure quantum dots. The present invention uses low-cost, non-toxic and chemically stable liquid paraffin as a non-coordinating solvent to manufacture cadmium-free quantum dots. Because of liquid paraffin's stable chemical properties and high effectiveness as a barrier against atmospheric moisture and oxygen, this manufacturing process can be performed in an air environment, greatly reducing vacuum environment costs.
Inventors:
CHEN WEI (CN)
WANG KAI (CN)
SUN XIAOWEI (CN)
HAO JUNJIE (CN)
QIN JING (CN)
WANG KAI (CN)
SUN XIAOWEI (CN)
HAO JUNJIE (CN)
QIN JING (CN)
Application Number:
PCT/CN2016/102486
Publication Date:
April 27, 2017
Filing Date:
October 19, 2016
Export Citation:
Assignee:
GUANGDONG REAL FAITH OPTO CO LTD (CN)
International Classes:
C09K11/62; C09K11/02
Domestic Patent References:
| WO2012168279A1 | 2012-12-13 |
Foreign References:
| CN103215034A | 2013-07-24 |
Other References:
CHEN, W. ET AL.: "Highly Efficient and Stable Luminescence from Microbeans Integrated with Cd -Free Quantum Dots for White-Light-Emitting Diodes", PARTICLE AND PARTICLE SYSTEMS CHARACTERIZATION, vol. 32, 2 September 2015 (2015-09-02), pages 922 - 927
Attorney, Agent or Firm:
JIAQUAN IP LAW FIRM (CN)
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