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A surface modification and quantum dot technology, applied in the field of nanomaterials, can solve the problems of limited use and poor dispersion performance, and achieve the effect of strong binding ability, good conductivity and high proportion
Active Publication Date: 2022-01-21
SUZHOU XINGSHUO NANOTECH CO LTD
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However, the dispersion performance of this kind of oil-phase quantum dots in strong polar solvents such as propylene glycol methyl ether acetate is poor, which severely limits its use in related application devices.
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[0049] The present invention also provides a method of preparing a quantum dot as described above, comprising the steps of:
[0050] S1, obtain the quantum dot body solution of the oil phase;
[0051] S2, in the quantum point body solution of the oil phase, the ligand (the amount of the oil phase quantum point body in the amount of the oil phase, the mass ratio of the ligand is (0.1-10): 1; preferably, oil The oil phase quantum point body in phase of the phase quantum dot body solution, the puzzle mass ratio is (0.2-2: 1), the temperature is 25-280 ° C (preferably, the temperature of the reaction is 100-180 ° C) After at least once purification, the quantum dots are obtained.
[0052] In some preferred embodiments of the invention, the method of preparing the quantum dot also includes a step of precipitating, purifying the quantum dots modified by pure depositor. These steps are well known in the art, and details are not described herein again.
[0053] In a preferred embodiment o...
Embodiment 1
[0060] 1. This embodiment provides a quantum dot, the quantum dot body is green inP / ZNS, and the structural formula of the ligand is as follows:
[0061] 2, the present embodiment provides a method of preparing the quantum dots of the above surface, including the following steps:
[0062] S1, obtain the green light INP / ZNS bulk solution of the oil phase;
[0063] In the green light INP / ZNS body solution of 1 g of an oil phase, a 1.2 g of the ligand was added, and the temperature was 140 ° C, and the quantum dots were obtained by at least once purification to give the surface modified quantum dots.
[0066] 1. The present embodiment provides a surface modified quantum dot, the structure of the surface modified quantum dot is in Example 1.
[0067] 2, the present embodiment provides a method of preparing the quantum dots of the above surface, including the following steps:
[0068] S1, obtain the green light INP / ZNS bulk solution of the oil phase;
[0069] S2, in the green INP / ZNS body solution of 1 g of an oil phase, 0.6 g of the ligand is added, and the temperature is 140 ° C, and the quantum dots are obtained by at least once purification to obtain surface modification.
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Abstract
The invention discloses a surface-modified quantum dot, which comprises a quantum dot body and a ligand combined with the quantum dot body, one end of the ligand is a metal coordination group containing at least one sulfydryl, and the other end of the ligand is a derivative of an ester group or an amide group. The purification step is not needed, the ligand is directly added into the oil-phase quantum dot solution for one-pot reaction, and the experimental steps are simplified; the binding capacity of the ligand and the quantum dot body is high, the ligand is large in polarity, small in dosage and low in molecular weight, so that after the quantum dot body is modified, the proportion of the non-conductive ligand on the modified quantum dot is low, the proportion of the conductive quantum dot body is high, and the conductivity of the quantum dot subjected to surface modification is good; and a device prepared from the surface-modified quantum dots is high in external quantum efficiency.
Description
Technical field [0001] The present invention belongs to the field of nanomaterials, and more particularly to a surface modified quantum dot and a preparation method thereof, a light emitting diode, and a display device. Background technique [0002] Quantum dots have excellent optical properties, which are widely used in the fields of display. The synthesis of the existing quantum dots is typically carried out in a non-polar oil phasesystem, by dissolving such oil phase quantum dots in a non-polar solvent or a low polar solution such as alkane or toluene, it is possible to prepare a high luminous efficiency. LED. However, such oil phase quantum dots are poor in polar solvents such as propylene glycol methyl ether acetate, which has severely limiting its use in related application devices. [0003] Therefore, there is an urgent need for a quantum point that can be dissolved in a polar solvent and can achieve high quantum efficiency. Inventive content [0004] In view of this, it...
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