Dear Kelvin Paul,

You can try plasma treatments with air, O2, N2 or rare gas increase the wettability of ITO. Low-pressure plasmas work as well as corona/APPJ-plasmas. Coating should be done immediately after plasma treatment due to hydrophobic recovery of the ITO surface.

You need to optimize the applied power and process time otherwise chances of borning of ITO film.

Dear Kelvin Paul,

You can try plasma treatments with air, O2, N2 or rare gas increase the wettability of ITO. Low-pressure plasmas work as well as corona/APPJ-plasmas. Coating should be done immediately after plasma treatment due to hydrophobic recovery of the ITO surface.

You need to optimize the applied power and process time otherwise chances of borning of ITO film.

Adding to Mallikarjuna's suggestion, the ideal method to clean the ITO on PET substrates, you had better to use a detergent such as DECOM90 or other detergents. Firstly, you need to use deionsed water to dilute the detergent e.g. 1:4 ratio of detergent to DI water. Then put your substrates on a holder dippping into the mixture of the detergent solution. After that, put the container with solution and substrates into a ultrasonic bath for cleaning in the duration of 30 mins. Then, wash the ITO substrates with DI water. Dry the substrates with a Nitrogen blower. Then you could put the substrates into a plasma Asher to have a treatment.

Hope it helps.

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Thank you @Mallikarjuna and @Xuhua for your input. I will follow the similar steps in cleaning the ITO coated PET.

Dear Kelvin,

a) Sonication with DECOM90

b) Low power (15-20W) plasma treatment with O2

Hope this helps.

Try eaching process