SYNTHESIS OF HIGH CRYSTALLINE ZNO QUANTUM DOTS AND INK FORMULATION FOR PRINTED ELECTRONICS APPLICATION

PURPOSE: A manufacturing method of highly crystalline zinc oxide quantum dots is provided to be manufactured by a low temperature process, and to have excellent dispersity. CONSTITUTION: A manufacturing method of highly crystalline zinc oxide quantum dots comprises a step of dissolving a zinc acetate dihydrate into a methanol(S200); a step of dissolving potassium hydroxide into a methanol(S210); a step of adding the result from the second step into the result from the first step up to pH of 9(S220); a step of reacting the result of the third step(S230); and a step of mixing the result from the fourth step and deionized water, to manufacture ZnO quantum dots(S240). [Reference numerals] (s200) Step of producing a solution 1 by dissolving 0.1M zinc acetate dehydrate in methanol; (s210) Step of producing a solution 2 by dissolving 1M KOH in methanol; (s220) Step of producing a solution 3 by heating the solution 1 to 55°C-70°C to be prepared and mixing the solution 2 with the solution 1 until pH becomes 9; (s230) Step of preparing a solution 4 by heating the solution 3 to 25°C-70°C to be prepared and heating DI-water to 25°C-100°C; (s240) Step of producing a solution 5 containing ZnO QDs by slightly executing the reaction of the identical amount of solutions 3 and 4; (s250) Step of centrifuging the solution 5 to decant precipitate(ZnO), re-filling and mixing with ethanol, and re-centrifuging to wash the ZnO QDs