the disclosure provides a manufacturing method for coa substrate : utilizing pedot , pprodot or pedot derivatives with or without doping with graphene , or pprodot derivatives replaces traditional ito to be conductive materials of pixel electrodes ; quantum dots can be modified by prodot derivatives or edot derivatives which including carboxyl group , and quantum dot color filters of red filter layers , green filter layer and blue filters layers comprised on the tft substrate are formed by the method of electric chemical deposition based on a property of the aforementioned two being able to polymerize under influences of electric field and pixel electrode patterns on the tft substrate . therefore , zero waste can be achieved in quantum dots , a usage of quantum dots can be decreased , indium usage can be decreased , researching and development cost can be reduced , and the circumstances can be protected , furthermore , the qds color film having the better bonding strength bonds the counter electrode layer through chemical bond , and avoids adverse results as a peel is caused by insufficient bonding strength between photoresist and substrate .