Modified quantum dot and its preparation method, colorant, photosensitive resin composition, color filter and display device
A photosensitive resin, quantum dot technology, applied in the fields of optical filters, nonlinear optics, chemical instruments and methods, etc., can solve the problems of poor solvent resistance, low color transmittance, poor heat and light resistance of dyes, etc. Dispersibility, the effect of improving dispersibility and optical properties, avoiding decomposition
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[0078] Corresponding to the above-mentioned modified quantum dots, an embodiment of the present invention provides a preparation method comprising the modified quantum dots provided in the above-mentioned embodiment, such as figure 1 As shown, it may specifically include:
[0079] S1. Preparation of C in combination with an amino group 6 -C 22 Quantum dots of hydrocarbons;
[0080] S2. Onium salting the quantum dots with an onium salting reagent to form quantum dots containing ammonium salt groups;
[0081] S3, reacting the quantum dots containing ammonium salt groups with acid dyes to form a salt to obtain modified quantum dots.
[0082] In step S1, various ways can be used to prepare the quantum dots bound with amino group-containing hydrocarbons. For example, in the process of preparing quantum dots itself, many precursor ligands are used. After the quantum dots are synthesized, some precursor ligands are coated on the quantum dots. These precursor ligands contain hydro...
Embodiment a
[0098] First, the amino group-containing quantum dots are synthesized by the following steps:
[0099] (1) After cleaning and drying the three-necked bottle, use an electronic scale to weigh 0.177g CdO, 1gOA (oleic acid), and 2g ODE (octadecene) into the three-necked bottle, and add a magnet of appropriate size.
[0100] (2) Put the three-necked bottle into a magnetic stirrer and put it in place. First, nitrogen gas is introduced (quick at the beginning), and the heating switch and the magnetic stirring switch are turned on, and then heated to 280°C (250°C starts to dissolve), until it is colorless transparent.
[0101] (3) Cool down to below 50°C, add 8g ODE, and change the nitrogen vent to the condenser tube on the middle bottle mouth.
[0102] (4) Continue to heat up to 280°C. During the heating process, prepare 0.2607gSe, 3gTOP (trioctylphosphine), and 0.5g oleylamine, mix 0.2607gSe and 3gTOP together, and heat properly to dissolve Se in TOP until it is colorless and tra...
Embodiment b
[0130] The specific synthesis method and synthesis steps are the same as in Example a, except that diethyl sulfate is used instead of dimethyl sulfate to obtain modified quantum dots b.
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