Passivation quantum dot film and preparation method thereof
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A quantum dot film and quantum dot technology, which are applied in the field of passivation quantum dot film and its preparation, can solve problems such as poor device stability, and achieve the effects of avoiding instability, improving mobility, and improving surface defects
Inactive Publication Date: 2017-05-24
TCL CORPORATION
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[0004] The object of the present invention is to provide a passivated quantum dot film and its preparation method, aiming to solve the problem of the existing quantum dot solid film, because the quantum dot surface usually contains organic ligands, resulting in the quantum dot solid film and the quantum dot containing the quantum dot solid film. The problem of poor device stability of the cured film
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[0019] And, the embodiment of the present invention also provides a method for preparing a passivated quantum dot film, comprising the following steps:
[0020] S01. Provide oil-soluble quantum dots, metal ion precursor stock solutions, and halogen-substituted organic substances;
[0021] S02. Dissolving the oil-soluble quantum dots to obtain an oil-soluble quantum dot solution, mixing the oil-soluble quantum dot solution with the reaction medium, heating and degassing, then adding the metal ion precursor stock solution, heating and stirring the reaction , performing metal ion surface passivation on the oil-soluble quantum dots to obtain passivated quantum dots;
[0022] S03. Provide a substrate, dissolve the passivated quantum dots into a passivated quantum dot solution, and deposit the passivated quantum dot solution on the substrate by a solution method to obtain a passivated quantum dot film;
[0023] S04. Dissolving the halogen-substituted organic matter to prepare a hal...
Embodiment 1
[0040] A preparation method of passivated quantum dot film, comprising the following steps:
[0041] S11. Provide oil-soluble quantum dots, metal ion precursor stock solutions, and halogen-substituted organic substances.
[0042] Wherein, the oil-soluble quantum dots are near-infrared oil-soluble PbS quantum dots, and the metal ion precursor stock solution is a cadmium precursor stock solution (CdCl 2 -TDPA-OLA), the halogen-substituted organic compound is cetyltrimethylammonium bromide (CTAB).
[0043] Specifically, the preparation of S111. near-infrared oil-soluble PbS quantum dots is as follows:
[0044] S1111. Weigh 0.15g of lead oxide (PbO), 0.64ml of oleic acid (OA), and 10ml of octadecene (ODE) into a 50ml three-neck flask, exhaust at room temperature for 10min, and then heat to 120°C Exhaust for 60min, then maintain at 120°C to prepare lead oleate {Pb(OA) 2}Pre-body spare.
[0045] S1112. Take 100 microliters of hexamethyldisilathane (TMS) and add it to 12ml of oct...
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Abstract
The invention provides a preparation method of a passivation quantum dot film. The preparation method comprises the following steps: providing oil-soluble quantum dots, a metal ion precursor storing solution and a halogen substituted organic matter; dissolving the oil-soluble quantum dots to obtain an oil-soluble quantum dot solution; mixing the oil-soluble quantum dot solution with a reaction medium, carrying out heating and degassing treatment, then adding the metal ion precursor storing solution, and carrying out heating and stirring reaction to obtain passivation quantum dots; providing a substrate, dissolving the passivation quantum dots into a passivation quantum dot solution, and depositing the passivation quantum dot solution on the substrate by a solution method to obtain the passivation quantum dot film; dissolving the halogen substituted organic matter to prepare a halogen substituted organic matter storing solution; cleaning the passivation quantum dot film by adopting the halogen substituted organic matter storing solution, and carrying out surface ligand exchange; cleaning by adopting an organic solvent to remove a fallen organic ligand in an exchange process; repeating the steps of cleaning by the halogen substituted organic matter storing solution and cleaning by the organic solvent.
Description
technical field [0001] The invention belongs to the technical field of quantum dot synthesis, and in particular relates to a passivated quantum dot film and a preparation method thereof. Background technique [0002] Quantum dots are a new type of semiconductor nanomaterials, which have unique size-dependent optoelectronic properties. As a luminescent material, they have the advantages of high energy efficiency, high stability, and wide color gamut. In recent years, colloidal quantum dots have been deeply studied and widely used in many fields, and related technologies have also been greatly developed, especially in the fields of quantum dot light-emitting diodes, solar cells, and biomarkers. [0003] Generally, the application of quantum dots in quantum dot light-emitting diodes and solar cells generally exists in the form of quantum dot films. Since the preparation process of the quantum dot film will involve the surface modification of the quantum dot (such as modifying ...
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