i'm studying inorganic material in QD-OLED and have sysnthesised NiO nanoparticles.

at first , i didn't use stabilizer acetic acid. but afterward i realized that i had to use acetic acid as stabilizer.

when i use aetic acid, the turbid solution(NiO NPs) changed a clear solution.

but it seems like that NiO NPs is not coated in ITO that is treated by ozone generator(i use spin-coating).

what is the role of stabilizer (detail plz) and what is the problem in coating process?

and if the quantity of stabilizer is added more than reference value, what's the problem?

thank you.