| abstract |
Provided is a method for preparing quantum dots of lead selenide, comprising the following steps: 1) mixing selenium powder with octadecene, heating with stirring to dissolve the selenium powder fully, maintaining the temperature, then cooling to room temperature to obtain a stock solution of selenium; 2) mixing lead compound, oleic acid, octadecene and benzophenone together, and dissolving to obtain a stock solution of lead, then maintaining the temperature at 130-190℃; 3) adding the stock solution of selenium into the stock solution of lead rapidly, and maintaining the temperature at 100-160℃, after cooling, quantum dots of lead selenide are initially prepared; 4) adding the initially prepared quantum dots of lead selenide into a mixture of toluene and methanol, centrifugating and removing the supernatant to obtain a precipitate, then redissolving the precipitate with toluene to obtain a transparent solution of quantum dots of pure lead selenide. The method is safe in operation, simple, good in reproducibility and low in cost. |