I am unable to spin coat PEDOT:PSS on top of PMMA as it is not wetting the surface. Does anyone have knowledge about this ?

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Hossein Yahyaei

You should do surface treatment on PMMA surface. By performing some surface treatment like plasma on the surface of PMMA, the surface energy of PMMA surface increase and wetting occurs.

Yang Jin

What kind of PEDOT:PSS did you used? Possible simple way is to add some surfactant.

Shiru Jiang

I think you can do some pre-treatment before your spin-coating, oxygen plasma and Silicified by APTES are good choice