A method for doping asymmetric metal ions in semiconductors
A technology of metal ions and semiconductors, applied in the field of doping of heterovalent metal ions, can solve the problems of weak luminescence and difficulty in doping, and achieve the effect of simple device and low cost
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[0040] The preparation method of the precursor solution of sulfur is as follows:
[0041] Take 5ml of oleylamine and 10ml of oleic acid, add them to a 50ml round bottom flask in sequence, stir evenly, weigh 64mg of sulfur powder, add it to the above mixture, stir at room temperature for 2min, and react with magnetic stirring in an oil bath at 100°C for 40min, and pour into it 15ml of toluene was added, magnetically stirred evenly, and the temperature was lowered to room temperature to obtain a sulfur precursor solution.
[0042] The preparation method of the precursor solution of selenium is as follows:
[0043] Take 6-10ml of octadecene (ODE) in a three-necked flask, weigh 79mg of selenium powder into the above-mentioned three-necked flask, stir evenly with a magnetic force, heat to 270-300°C in a constant temperature heating mantle, and stir the reaction at this temperature for 15min to Form a yellow transparent clear solution, stop heating, cool down to room temperature, a...
Embodiment 1
[0052] (1) Take 6ml of monodisperse 4nmAg toluene sol in a 25ml round bottom flask, add 3ml of sulfur precursor solution to it, stir and react in a water bath at 50°C for 1h, add ethanol, and centrifuge at 5000r for 8min to obtain monodisperse Ag 2 S nanoparticles, redispersed in 6-10ml toluene to obtain Ag 2 S nanoparticle sol.
[0053] (2) The monodisperse Ag obtained in step (1) 2 S nanoparticle sol, under magnetic stirring, add 0.2ml oleic acid, 0.1ml oleylamine and 1ml Cd(NO 3 ) 2 4H 2 O methanol solution (0.1g / ml), stirred magnetically at room temperature for 1min, added 0.1mlTBP, and reacted with magnetic stirring in a 50°C water bath for 2h, added ethanol, and centrifuged at 5000r for 8min to obtain CdS quantum dots with a silver doping amount of 1% ( 1% is an atomic proportion).
[0054] The resulting CdS quantum dots were detected by transmission electron microscopy, showing that they had good monodispersity (e.g. figure 1 shown), the size of a single CdS nano...
Embodiment 2
[0056] (1) Take 6ml of monodisperse 4nmAg toluene sol in a 25ml round bottom flask, add 3ml of sulfur precursor solution to it, stir and react in a water bath at 50°C for 1h, add ethanol, and centrifuge at 5000r for 8min to obtain monodisperse Ag 2 S nanoparticles, redispersed in 6-10ml toluene to obtain Ag 2 S nanoparticle sol.
[0057] (2) The monodisperse Ag obtained in step (1) 2 S nanoparticle sol, under magnetic stirring, add 0.2ml oleic acid, 0.1ml oleylamine and 1ml Cd(NO 3 ) 2 4H 2 O methanol solution (0.1g / ml), stirred magnetically at room temperature for 1min, added 0.2mlTBP, and reacted with magnetic stirring in a 50°C water bath for 2h, added ethanol, and centrifuged at 5000r for 8min to obtain CdS quantum dots with a silver doping amount of 1% ( 1% is an atomic proportion).
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