Quantum dot material, preparation method thereof, quantum dot light-emitting diode and light-emitting device
A quantum dot material and quantum dot light-emitting technology, which is applied in the field of quantum dot light-emitting diodes, quantum dot materials and their preparation, and light-emitting devices, can solve problems such as reducing carrier transport capacity and hindering carrier movement, and achieve improved luminescence Performance, the effect of improving luminous efficiency
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[0028] Correspondingly, such as figure 1 As shown, the second aspect of the embodiment of the present invention provides a method for preparing a quantum dot material, comprising the following steps:
[0029] S01. Provide an initial quantum dot solution and hydrazine molecules, add the hydrazine molecules to the initial quantum dot solution, heat the reaction, and make the quantum dot particles coordinate with the nitrogen atoms in the hydrazine molecules to prepare quantum dot materials.
[0030] In the preparation method of the quantum dot material provided in the embodiment of the present invention, the quantum dot particles and the hydrazine molecules are mixed in a liquid medium to react to prepare the quantum dot particles and the nitrogen atoms in the hydrazine molecules. Bit-bonded quantum dot materials. The method is simple in operation, mild in conditions and easy to control, and is conducive to realizing large-scale production. More importantly, the quantum dot ma...
Embodiment 1
[0076] A quantum dot material modified by hydrazine molecules, the preparation method of which is as follows:
[0077] 1) Add an appropriate amount of CdS / ZnS to 20ml ODE to form a quantum dot colloid solution with a total concentration of 20mg / mL. Then the temperature was raised to 200°C in an argon atmosphere, and then oleylamine was injected according to the volume ratio of quantum dots and oleylamine at a ratio of 100:1, and the temperature was kept for 30 minutes to form a quantum dot solution.
[0078] 2) Add hydrazine into the quantum dot solution according to the molar ratio of quantum dots to hydrazine of 1:1, and continue to stir at 200°C for 30min. After the reaction, after the reaction solution was lowered to room temperature, it was precipitated and washed step by step with a mixed solvent of ethyl acetate and ethanol, a mixed solvent of acetone and ethanol, and then redispersed in n-hexane to prepare a hydrazine-modified CdS / ZnS quantum point.
Embodiment 2
[0080] A quantum dot material modified by a 4-methylhydrazine molecule, the preparation method of which is as follows:
[0081] 1) Add an appropriate amount of Cd 1-x Zn x S was added to 20ml 1-hexadecene to form a quantum dot colloidal solution with a total concentration of 30mg / mL. Then the temperature was raised to 200°C in an argon atmosphere, and then oleylamine was injected according to the volume ratio of quantum dots and oleylamine at a ratio of 120:1, and the temperature was kept for 30 minutes to form a quantum dot solution.
[0082] 2) Add 4-methylhydrazine to the quantum dot solution according to the molar ratio of quantum dots to 4-methylhydrazine of 1:1.5, and continue stirring at 200° C. for 1 h. After the reaction is over, after the reaction solution has dropped to room temperature, it is precipitated and washed step by step with a mixed solvent of ethyl acetate and ethanol, a mixed solvent of acetone and ethanol, and then redispersed in n-octane to prepare 4...
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