Table 1 Previously reported solvent exchange processes for water-based PEDOT:PSS solutions.
From: Multifunctional molybdenum disulfide flash memory using a PEDOT:PSS floating gate
Method | Solvent | Stability of re-dispersion | Problems (limitations) | Ref. |
|---|---|---|---|---|
Mixture & Evaporation | NMP, DMAC, DMF, etc. | Not verified | - Limited solvent (High b.p > 150 °C) ☞ High drying temperature requirement, poor coating - Environmentally restricted materials (NMP, DMAC, DMF) by EU, ‘REACH’ (2018.10.31~Present) | |
Mixture (3:1 v/v) | DMSO, DMF, THF | Not verified | - Simple mixing, not solvent exchange | |
Synthesis of Alkyl derivative PEDOT | Chloroform, DMF | Good | - Far less conductive - Very complex, small production | |
Synthesis of PEDOT:PSS in organic solvent | Methanol, THF, Toluene, etc. | Moderate | - Far less conductive - Complex and complicated | |
Ultrafiltration | All with high ∂H (>19.4) such as EtOH, EG, etc. | Very Good | <Advantages> - Various solvents (both high and low b.p) - Highly conductive (no loss of conductivity) - Simple, fast, and conducive to mass production | This work |
