A kind of quantum dot with cuins2/zns core-shell structure and its preparation method
A technology of core-shell structure and quantum dots, which is applied in the field of CuInS2/ZnS core-shell structure quantum dots and its preparation, can solve the problems of low fluorescence efficiency of CuInS quantum dots, and achieve the advantages of mass production, short synthesis cycle and improved use efficiency Effect
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Embodiment 1
[0031] The first step, weigh 29.2mg (0.1mmol) In(Ac) 3 and 12.2mg (0.1mmol) CuAc were placed in a three-necked flask, and 5ml of n-octyl mercaptan was added, and under the condition of magnetic stirring and argon protection, heated to 120°C to make In(Ac) 3 and CuAc were completely dissolved and clarified, and the temperature was kept constant to vacuumize for 30 minutes to obtain a mixed precursor solution of In and Cu.
[0032] The second step is to backfill the system with argon, and heat the mixed precursor solution of In and Cu from room temperature to 230 °C for 15 minutes at a heating rate of 1 °C / s to prepare CuInS 2 Quantum dot solution.
[0033] In the third step, the obtained CuInS 2 The quantum dot solution was cooled to 200°C, and then Zn(SA) with a concentration of 0.1M was added dropwise. 2 -ODE solution, after heating and reacting for 30min, remove the heat source and naturally cool to room temperature and centrifuge to obtain CuInS 2 / ZnS core-shell quantu...
Embodiment 2
[0036] The first step, weigh 29.2mg (0.1mmol) In(Ac) 3 and 12.2mg (0.1mmol) of CuAc were placed in a three-necked flask, and 5ml of n-octyl mercaptan was added, under the conditions of magnetic stirring and argon protection, heated to 120°C to make In(Ac) 3 and CuAc were completely dissolved and clarified, and the temperature was kept constant to vacuumize for 30 minutes to obtain a mixed precursor solution of In and Cu.
[0037] The second step is to backfill the system with argon, and heat the mixed precursor solution of In and Cu from room temperature to 230 °C for 60 minutes at a heating rate of 1 °C / s to prepare CuInS 2 Quantum dot solution.
[0038] In the third step, the obtained CuInS 2 The quantum dot solution was cooled to 200°C, and then Zn(SA) with a concentration of 0.1M was added dropwise. 2 -ODE solution, after heating and reacting for 30min, remove the heat source and naturally cool to room temperature and centrifuge to obtain CuInS 2 / ZnS core-shell quantu...
Embodiment 3
[0041] The first step, weigh 58.3mg (0.2mmol) In(Ac) 3 and 19.2mg (0.1mmol) CuI were placed in a three-necked flask, and 5ml of n-dodecyl mercaptan was added, and under the conditions of magnetic stirring and argon protection, heated to 120°C to make In(Ac) 3 and CuI were completely dissolved and clarified, and the temperature was kept constant to vacuumize for 30 minutes to obtain a mixed precursor solution of In and Cu.
[0042] The second step is to backfill the system with argon, and heat the mixed precursor solution of In and Cu from room temperature to 250 °C for 30 minutes at a heating rate of 1 °C / s to prepare CuInS 2 Quantum dot solution.
[0043] In the third step, the obtained CuInS 2 The quantum dot solution was cooled to 220°C, and then Zn(SA) with a concentration of 0.1M was added dropwise. 2 -ODE solution, after heating and reacting for 30min, remove the heat source and naturally cool to room temperature and centrifuge to obtain CuInS 2 / ZnS core-shell quant...
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