Quantum dot and preparation method thereof and photoelectric device

A technology of quantum dots and quantum dot solutions, which is applied in the field of quantum dot luminescent materials, can solve problems such as the difficulty in regulating the composition and structure of quantum dots, and achieve the effects of avoiding self-nucleation, narrowing the half-peak width of fluorescence, and improving the energy band structure

Active Publication Date: 2019-10-11
NANJING TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The main purpose of the present invention is to provide a quantum dot, its preparation method and optoelectronic device

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  • Quantum dot and preparation method thereof and photoelectric device
  • Quantum dot and preparation method thereof and photoelectric device
  • Quantum dot and preparation method thereof and photoelectric device

Examples

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Example Embodiment

[0037] Since it is difficult for the Cd-free quantum dots in the prior art to form quantum dots with tunable composition and structure, in order to improve this situation, in a typical embodiment of the present application, a II-III-V-VI quantum dot is provided. The preparation method includes: step A, preparing a first nanocluster, a second nanocluster and a third nanocluster, wherein the first nanocluster is III-V nanocluster, the second nanocluster is The clusters are III-II-V nanoclusters, and the third nanoclusters are III-II-VI nanoclusters; step B, the first nanocluster is mixed with a non-coordinating solvent to form a first quantum dot solution; step C, mixing and heating the second nanocluster with the first quantum dot solution to form a second quantum dot solution; Step D, mixing and heating the third nanocluster with the second quantum dot solution to form a third quantum dot solution, the third quantum dot solution The third quantum dots in the dot solution are I...

Example Embodiment

[0064] Example 1

[0065] (1) First nanocluster solution: 0.2 mmol In(Ac) 3 (Indium acetate), 0.6 mmol hexadecanoic acid and 6 mL ODE (octadecene) were added to a 50 mL three-necked flask, and the three-necked flask was placed under N 2 It was heated to 180°C in the exhaust state, kept at 180°C for 30 minutes, and then lowered to 40°C. 0.1 mmol of TMS-P (tris(trimethylsilyl)phosphine) and 1 mmol of trioctylamine were added to react for 20 min to form InP nanoclusters, which were cooled to room temperature for later use.

[0066] Second nanocluster solution: 0.2 mmol In(Ac) 3 (Indium acetate), 0.2mmol Zn(Ac) 2 (zinc acetate), 1.0 mmol hexadecanoic acid and 6 mL ODE (octadecene) were added to a 50 mL three-necked flask, and the three-necked flask was heated to 180°C under N2 exhaust state, kept at 180°C for 30min, and then decreased to 60°C. 0.1 mmol of TMS-P (tris(trimethylsilyl)phosphine) and 5 mmol of dioctylamine were added to react for 20 min to form InZnP nanoclusters...

Example Embodiment

[0070] Example 2

[0071] (1) First nanocluster solution: 0.2 mmol In(Ac) 3 (Indium acetate), 0.6 mmol hexadecanoic acid and 6 mL ODE (octadecene) were added to a 50 mL three-necked flask, and the three-necked flask was placed under N 2 It was heated to 180°C in the exhaust state, and after holding at 180°C for 30 minutes, it was lowered to 60°C. 0.04 mmol of TMS-P (tris(trimethylsilyl)phosphine) and 1 mmol of trioctylamine were added to react for 20 min to form InP nanoclusters, which were cooled to room temperature for use.

[0072] Second nanocluster solution: 0.2 mmol In(Ac) 3 (Indium acetate), 0.1mmol Zn(Ac) 2 (zinc acetate), 0.8 mmol hexadecanoic acid and 6 mL ODE (octadecene) were added to a 50 mL three-necked flask, and the three-necked flask was heated to 180° C. under N2 exhaust state, kept at 180° C. for 30 min, and then decreased to 60°C. 0.04 mmol of TMS-P (tris(trimethylsilyl) phosphine) and 5 mmol of dioctylamine were added to react for 20 min to form InZnP...

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Abstract

The invention provides a quantum dot and a preparation method thereof and a photoelectric device. The preparation method of the II-III-V-VI quantum dot includes the following steps that a first nano cluster, a second nano cluster and a third nanao cluster are prepared, wherein the first nano cluster is III-V nano cluster, the second nano cluster is III-II-V nano cluster, and the third nano clusteris III-II-VI nano cluster; the first nano cluster is mixed with a non-coordination solvent to form a first quantum dot solution; the second nano cluster is mixed with the first quantum dot solution and then heated to form a second quantum dot solution; the third nano cluster is mixed with the second quantum dot solution and heated to form a third quantum dot solution, wherein the third quantum dot in the third quantum dot solution is the II-III-V-VI quantum dot. By mixing and adding the nano clusters one by one, effective doping can be achieved, the band structure is improved, and the surfacedefects and dangling bonds are reduced, so that the composition structure is adjustable and the size uniformity of the quantum dot is improved.

Description

technical field [0001] The invention relates to the field of quantum dot luminescent materials, in particular to a quantum dot, its preparation method and a photoelectric device. Background technique [0002] Quantum dot material is a kind of inorganic compound with quantum confinement effect, which has excellent luminescent performance. Common quantum dot materials include CdSe, CdS, ZnSe, and ZnS of II-VI groups, InP and InAs of III-V groups, and CuInS and CuInSe of I-III-VI groups. Among the above-mentioned materials, CdSe and CdS are quantum dots with excellent luminescent performance and are widely used, but they contain heavy metal Cd, which is restricted by EU RoSH and other regulations, casting a shadow over their commercialization process. Among the existing Cd-free quantum dots, the InP material has the strongest substitution effect, which has a wide luminous range and a large Stokes shift, and can be used in display and biology fields. However, the synthesis of ...

Claims

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Application Information

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IPC IPC(8): C09K11/88C09K11/02B82Y20/00B82Y30/00
CPCC09K11/883C09K11/02B82Y20/00B82Y30/00
Inventor 乔培胜吴洪剑高静
Owner NANJING TECH CORP LTD
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