Lead-aluminum mixed perovskite blue-light quantum dot material and preparation method and application thereof
A quantum dot material, perovskite technology, applied in luminescent materials, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problems of low luminous efficiency, poor thermal stability, chromaticity drift, etc. The preparation method is simple and easy, the stability is strong, and the lead content is reduced.
Active Publication Date: 2017-09-29
PEKING UNIV SHENZHEN GRADUATE SCHOOL
View PDF2 Cites 8 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a lead-aluminum mixed perovskite blue light quantum dot material and its preparation method and application, aiming to solve the problem of low luminous efficiency, Poor thermal stability, and problems with spectral broadening and chromaticity shift
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0051] 1. Preparation of cesium oleate: referring to the quantum dot thermal injection synthesis method, Cs 2 CO 3 (0.640 g), dry OA (2 mL) and dry ODE (24 mL) were added to a 50 mL three-neck round bottom flask, and then heated to 150 °C until all Cs 2 CO 3 React with OA. Preheat to 140 °C before injection. All reactions were performed in a nitrogen-filled glove box (0.1 ppm H 2 O; 0.1 ppmO 2 ) in.
[0052] 2. Al-doped CsPbX 3 Synthesis of nanocrystals (X = Br, Br / I): dry ODE (5 mL), AlBr 3 (0.0301 g), PbX 2 , such as PbBr 2 (0.0690 g) or their mixture PbBr 2 / PbI 2 (0.0367 g / 0.0433 g, molar ratio 1:1), into a 25 mL three-neck flask. Then inject dry OAm (0.5 mL) and OA (0.5 mL) at 120 ºC. In complete dissolution of PbX 2 After salting, raise the temperature to 160 ºC. Subsequent injections of dry OAm (0.3 mL) and dry OA (0.3 mL) kept the solution clear. Cesium oleate solution (0.4 mL) was then quickly injected. After 1 min, the solution was transferred to a...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a lead-aluminum mixed perovskite blue-light quantum dot material, a preparation method of the lead-aluminum mixed perovskite blue-light quantum dot material and application of the lead-aluminum mixed perovskite blue-light quantum dot material. The material is composed of a lead halide perovskite doping main body and an aluminum ion doping precursor. The material disclosed by the invention has the advantages that a Pb site in the lead halide perovskite doping main body is partially substituted by an Al ion, so that the perovskite quantum dot light-emitting wavelength is regulated and controlled, and the problems of spectrum widening, chroma drift and the like caused by quick anion exchange are solved, meanwhile the content of heavy metal lead in the material can be reduced by utilization of lead-site doping, and the environmental friendliness is promoted; furthermore, the preparation method of the lead-aluminum mixed perovskite blue-light quantum dot material provided by the invention has the advantages of simplicity, easiness in implementation, low cost, low toxicity and universality; the lead-aluminum mixed perovskite blue-light quantum dot material can be directly applied to a fluorescence conversion layer of an electroluminescent LED (light emitting diode) or WLED (white light emitting diode).
Description
technical field [0001] The invention relates to the field of blue light quantum dot materials, in particular to a lead-aluminum mixed perovskite blue light quantum dot material and its preparation method and application. Background technique [0002] Lead halide perovskite quantum dots combine the advantages of perovskite materials with the characteristics of quantum dots. It has the characteristics of high luminous efficiency, narrow emission spectrum and adjustable emission wavelength. It is ideal for obtaining high-quality display panels with wide color gamut. Selection is of great commercial value in future display technologies. [0003] Although great progress has been made in the preparation of perovskite quantum dots, there are still the following problems: 1. Lack of high-quality blue light materials: at present, the adjustment of the emission wavelength of perovskite quantum dots depends on the type of halogen atoms, while lead chloride calcium Titanium quantum dot...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): C09K11/66H01L33/50B82Y30/00B82Y20/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/665H01L33/502
Inventor 孟鸿刘铭
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL