CdS/CdSe heterojunction quantum dot with core/shell structure and preparation method of CdS/CdSe heterojunction quantum dot
A quantum dot and heterojunction technology, applied in the field of CdS/CdSe heterojunction quantum dots and its preparation, to achieve the effect of improving photoelectric conversion efficiency
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Embodiment 1
[0020] Under a negative pressure environment, a mixture of 3.5g tri-n-octylphosphine oxide, 0.5g octadecylphosphonic acid and 0.1g chromium oxide was heated to 160°C for mixing; subsequently, the mixture was heated to 300°C under nitrogen protection Above, until CdO is completely dissolved, the solution is colorless and transparent; continue to heat up to 350 ° C, after the solution temperature is stable, mix 0.15g of bis(trimethylsilylmethyl)sulfide and 2.5g of tri-n-butylphosphine The solution was quickly added to the above reaction solution, and the temperature of the reaction solution was lowered to 260° C., and the reaction was maintained for 5 minutes; the reaction solution was precipitated with methanol, and then washed with toluene to obtain CdS quantum dots. The preparation of CdS / CdSe core / shell structure heterojunction is to mix the mixture of 3.5g tri-n-octylphosphine oxide, 0.3g octadecylphosphonic acid and 0.05g chromium oxide by heating to 160°C; Under the prote...
Embodiment 2
[0022] Under a negative pressure environment, a mixture of 3.5g tri-n-octylphosphine oxide, 0.5g octadecylphosphonic acid and 0.1g chromium oxide was heated to 160°C for mixing; subsequently, the mixture was heated to 300°C under nitrogen protection Above, until CdO is completely dissolved, the solution is colorless and transparent; continue to heat up to 350 ° C, after the solution temperature is stable, mix 0.15g of bis(trimethylsilylmethyl)sulfide and 2.5g of tri-n-butylphosphine The solution was quickly added to the above reaction solution, and the temperature of the reaction solution was lowered to 260° C., and the reaction was maintained for 3 minutes; the reaction solution was precipitated with methanol, and then fully washed with toluene to obtain CdS quantum dots. The preparation of CdS / CdSe core / shell structure heterojunction is to mix the mixture of 3.5g tri-n-octylphosphine oxide, 0.3g octadecylphosphonic acid and 0.05g chromium oxide by heating to 160°C; Under the...
Embodiment 3
[0024] Under a negative pressure environment, a mixture of 3.5g tri-n-butylphosphine oxide, 0.5g dodecylphosphonic acid and 0.1g chromium oxide was heated to 160°C for mixing; subsequently, the mixture was heated to 300°C under nitrogen protection Above, until CdO is completely dissolved, the solution is colorless and transparent; continue to heat up to 350 ° C, after the solution temperature is stable, mix 0.15g of bis(trimethylsilylmethyl)sulfide and 2.5g of tri-n-butylphosphine The solution was quickly added to the above reaction solution, and the temperature of the reaction solution was lowered to 260°C, and the reaction was maintained for 7 minutes; the reaction solution was precipitated with methanol, and then fully washed with toluene to obtain CdS quantum dots. CdS / CdSe core / shell structure heterojunction was prepared by heating a mixture of 3.5g tri-n-butylphosphine oxide, 0.3g dodecylphosphonic acid and 0.05g chromium oxide to 160°C for mixing; subsequently, the mixtu...
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