Preparation method of indium phosphide nanocrystals
A nanocrystal, indium phosphide technology, applied in the field of nanomaterials
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[0021] In the exemplary embodiment of the present application, the preparation method of indium phosphide nanocrystals includes the steps of: using M-(O-C≡P) n As one of the reaction precursors, wherein, M is a metal element, and n is 1, 2 or 3.
[0022] When the M element is a monovalent metal element such as Li, Na, K, Rb, Cs, etc., n is 1. When the M element is a divalent metal element such as Zn, Ca, Mn, Sr, etc., n is 2. When the M element is a trivalent metal element such as Al, Ga, Tl, etc., n is 3. Preferably, M-(O-C≡P) n Li-O-C≡P, Na-O-C≡P, K-O-C≡P, Zn-(O-C≡P) 2 or Ga-(O-C≡P) 3 .
[0023] Using M-(O-C≡P) n When used as a reaction precursor, an alloy indium phosphide nano-core containing P and M elements can be obtained, thereby improving the luminescence performance of the indium phosphide nanocrystal. Moreover, since the M element and the P element come from the same reaction precursor, the problem that the ratio of the M element and the P element is not easy ...
Embodiment 1
[0028] The indium phosphide nanocrystalline core is composed of three elements, In, P, and Li, and the shell is a double shell layer composed of ZnSe and ZnS.
[0029] The preparation process of indium phosphide nanocrystals is as follows:
[0030] S1. At 25°C, mix 0.5 mmol of indium chloride, 0.75 mmol of Li-O-C≡P, and 10 mL of oleylamine to obtain the first solution system;
[0031] S2. Heating the first solution system to 180° C. under nitrogen exhaust state, and reacting for 60 minutes to obtain a solution system containing nanocrystalline nuclei;
[0032] S3, heat up, add 24mmol of zinc stearate, 6mL of selenium-trioctylphosphine solution (2mmol / mL) and react to obtain a ZnSe shell coated on the nanocrystalline core, then add 6mL of sulfur-trioctylphosphine solution (2mmol / mL) and react to obtain the ZnS shell coated on the ZnSe shell;
[0033] S4. After the reaction is completed, nanocrystals are obtained through separation and purification.
Embodiment 2
[0035] The indium phosphide nanocrystalline core is composed of three elements, In, P, and Na, and the shell is a double shell layer composed of ZnSe and ZnS.
[0036] The preparation process of indium phosphide nanocrystals is as follows:
[0037] S1. At 25°C, mix 0.5mmol of indium chloride, 0.75mmol of Na-O-C≡P, and 10mL of oleylamine to obtain the first solution system;
[0038] S2. Heating the first solution system to 180° C. under nitrogen exhaust state, and reacting for 60 minutes to obtain a solution system containing nanocrystalline nuclei;
[0039] S3, heat up, add 24mmol of zinc stearate, 6mL of selenium-trioctylphosphine solution (2mmol / mL) and react to obtain a ZnSe shell coated on the nanocrystalline core, then add 6mL of sulfur-trioctylphosphine solution (2mmol / mL) and react to obtain the ZnS shell coated on the ZnSe shell;
[0040] S4. After the reaction is completed, nanocrystals are obtained through separation and purification.
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