What will happen to PEDOT:PSS film when heating to high temperatures like 200 degree?
Dear RAju,
After long search it becomes clear that the the polymers including PEDOT- pss has no boiling point simply because they decompose before they reach the boiling temperature. Even some polymers do not have a melting point because of the same reason. Please see the link:https://en.wikibooks.org/wiki/A-level_Physics_(Advancing_Physics)/Polymers#Boiling_Point
concerning the melting point Of PEDOT-PSS it is about 98–100 °C. for more information about the effect of temperature on the material please follow the link: http://yylab.seas.ucla.edu/papers/ouyang%202006.pdf
Best wishes
Than you for inviting me to answer this question.
hello everyone. I have a small question. How do I prepare Silicon substrate to deposit PEDOT:PSS on it?
There are two methods:
1. Since PEDOT:PSS (a water rich polymer) does not form a good and uniform film on silicon (which is hydrophobic), you must implement a very thin layer of silicon dioxide layer (1-3nm)- using HNO3 oxidation, native oxide or plasma oxidation- to make silicon surface hydrophilic. Oxide layer helps making silicon surface hydrophilic.
2. If you don't consider forming any type of oxide layers, you must use surfactants ( such as Zonyl, Triton) mixed with PEDOT:PSS to reduce the surface tension of PEDOT:PSS liquid. In this case, PEDOT:PSS will spread over even hydrophobic surface of silicon and will result an uniform film after spin coating.
Thank you Raju Kumar. I have tried with native oxide grown SiOx. Hope the result will be desirable.
Can I use IPA or Ethanol as surfactant or wetting agent in PEDOT:PSS to deposit on Silicon?
Yes. Can be used. There are many papers reported on it. You can google them.
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