Polypyrroles, assembly electrode materials

A solid-state solar cell was assembled with an ionic liquid—l-ethyl-3-methylimidazolium bis(trifluoromethanesulfone)amide (EMITFSA) containing 0.2 M lithium bis(trifluoromethanesulfone)amide and 0.2 M 4-tert-butylpyridine—as the electrolyte and Au or Pt sputtered film as the cathode.51,52 The in situ PEP of polypyrrole and PEDOT allows efficient hole transport between the ruthenium dye and the hole conducting polymer, which was facilitated by the improved electronic interaction of the HOMO of the ruthenium dye and the conduction band of the hole transport material. The best photovoltaic result ( 7p=0.62 %, 7SC=104 pA/cm2, FOC=0.716 V, and FF=0.78) was obtained from the ruthenium dye 5 with polypyrrole as the hole transport layer and the carbon-based counterelectrode under 10 mW/cm2 illumination. The use of carbon-based materials has improved the electric connectivity between the hole transport layer and the electrode.51... 

A blend of polypyrrole and poly(ethylene oxide) was prepared in a heterogeneous process where a solid-state electrochemical cell was immersed in a pyrrole solution. The cell was assembled coating a substrate containing the working and reference electrodes with a film of poly(ethylene oxide) doped with a lithium salt. A Ni sieve was placed on the top of the polymer film and a pulsed (or continuous) potential was applied after immersion of the assembled cell in a pyrrole solution [128]. Cyclic voltammetry of the material obtained was run after saturation with acetonitrile vapors. The solvent... 

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