Metal quantum dot core-shell heterojunction material and preparation method thereof
A quantum dot and heterojunction technology, which is applied in the field of metal quantum dot core-shell heterojunction materials and its preparation, can solve the problems of reducing luminous efficiency and final device efficiency, affecting carrier recombination, etc.
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[0022] The embodiment of the present application provides a method for preparing a metal quantum dot core-shell heterojunction material, including the following steps:
[0023] Step S1, preparing cuprous sulfide colloid.
[0024] Further, the cuprous sulfide colloid is prepared by dissolving cuprous sulfide nanoparticles in an organic solvent.
[0025] Further, the organic solvent is selected from at least one of octadecene, cyclohexane or toluene.
[0026] Colloids can be formed by dissolving cuprous sulfide nanoparticles in at least one of octadecene, cyclohexane or toluene, thereby preparing cuprous sulfide colloids.
[0027] The above-mentioned cuprous sulfide colloid is prepared. In other optional embodiments of the present application, the cuprous sulfide colloid can also be used directly, for example, by directly purchasing the cuprous sulfide colloid.
[0028] Step S2, dissolving the metal salt, oleylamine and organic phosphorus in an organic solvent to obtain a firs...
Embodiment 1
[0084] A metal quantum dot core-shell heterojunction material is provided, which is prepared as follows:
[0085] Step S1, dissolving cuprous sulfide nanoparticles in octadecene to form a colloid.
[0086] Step S2, add 0.5 mmol of zinc chloride solid, 0.6 ml of oleylamine and 0.1 ml of tributylphosphine to 20 ml of octadecene, heat to 80° C. and stir rapidly until a uniform solution is formed. Afterwards, the temperature was raised to 100°C, and water and oxygen were excluded for 20 minutes under the protection of argon.
[0087] Step S3, keep the temperature and stir, add 0.5ml of dodecanethiol to the solution prepared in step S2, and then add 3ml of cuprous sulfide colloid prepared in step S1 after uniformity; monitor the reaction until the fluorescence spectrum of the nanomaterial no longer If there is a change, stop responding. The reaction product is cooled to room temperature, and then the reaction product is post-treated with a mixed solution of acetone and ethanol, c...
Embodiment 2
[0089] A metal quantum dot core-shell heterojunction material is provided, which is prepared as follows:
[0090] Step S1, dissolving the cuprous sulfide nanoparticles in toluene to form a colloid.
[0091] Step S2: Add 0.5 mmol of solid cadmium nitrate, 0.6 ml of oleylamine and 0.1 ml of trioctylphosphine to 20 ml of toluene, heat to 80° C. and stir rapidly until a uniform solution is formed. Afterwards, the temperature was raised to 100°C, and water and oxygen were excluded for 20 minutes under the protection of nitrogen.
[0092] Step S3, keep the temperature and stir, add 0.5ml of hexanethiol to the solution prepared in step S2, and then add 3ml of cuprous sulfide colloid prepared in step S1 after uniformity; monitor the reaction until the fluorescence spectrum of the nanomaterial no longer occurs Changes stop responding. Then 10ml of oleic acid was added, and after the product was cooled to room temperature, the reaction product was post-treated with a mixed solution of...
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