Preparation method of Cu2ZnSnSxSe4-x nanocrystal
A nanocrystal and reactant technology, applied in the field of solar photovoltaic materials, can solve the problems of few nanocrystal reports, and achieve the effects of good crystallinity, simple preparation method and low cost
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Embodiment 1
[0019] Add 12ml of oleylamine into a 50ml three-necked round-bottomed flask connected to a Schlenk line, and raise the temperature to 130°C in an argon atmosphere to degas for 30 minutes. The reactant precursor 0.2mmol copper acetylacetonate, 0.1mmol zinc acetate, 0.1mmol tin tetrachloride and 0.4mmol sulfur powder were added to the reaction flask in turn, and the reaction temperature was slowly raised to 280°C in an argon atmosphere. °C for 20 minutes, remove the heating device to cool the reactant to 80 °C, add methanol to the cooled reaction product to settle the nanoparticles. Then, the nanocrystals were collected by centrifugation at a speed of 12000 rpm for 3 minutes, the suspension was poured into another container, and finally the precipitate was dispersed in chloroform.
Embodiment 2
[0021] Add 12ml of oleylamine into a 50ml three-necked round-bottomed flask connected to a Schlenk line, and raise the temperature to 130°C in an argon atmosphere to degas for 30 minutes. The reactant precursors 0.2mmol copper acetylacetonate, 0.1mmol zinc acetate, 0.1mmol tin tetrachloride and 0.4mmol hexamethyldisilathane were added to the reaction flask in turn, and the reaction temperature was slowly reduced in an argon atmosphere. The reaction temperature was increased to 270° C. for 15 minutes, and the heating device was removed to cool the reactant to 80° C., and methanol was added to the cooled reaction product to allow the nanoparticles to settle. Then, the nanocrystals were collected by centrifugation at a speed of 12000 rpm for 3 minutes, the suspension was poured into another container, and finally the precipitate was dispersed in chloroform.
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