Abstract
A self-doped conducting polyaniline was used as a hole transport layer (HTL) in organic photovoltaics (OPVs) [indium tin oxide/HTL/zinc-phthalocyanine/C70/bathocuproine/Al]. This polyaniline was characterized by phosphonic acid neutralized with pyridine (PMAP:Py). The current–voltage characteristics were evaluated and were comparable to those of the devices using a conventional hole transport material, poly(3,4-ethylenedioxythiophene) doped with poly(styrenesulfonate) (PEDOT:PSS). PMAP:Py-based OPVs stored in both nitrogen and ambient atmosphere had a longer lifetime than PEDOT:PSS-based ones.
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