Thermal degradation mechanisms of PEDOT:PSS
2008; Elsevier BV; Volume: 10; Issue: 1 Linguagem: Inglês
10.1016/j.orgel.2008.10.008
ISSN1878-5530
AutoresE. Vitoratos, S. Sakkopoulos, E. Dalas, Νικόλαος Παλιάτσας, Dimitrios Karageorgopoulos, F. Petraki, Στέλλα Κέννου, Stelios A. Choulis,
Tópico(s)Advanced Sensor and Energy Harvesting Materials
ResumoThe thermal stability of thin (50 nm) PEDOT:PSS films, was investigated by dc conductivity measurements, X-ray and UV photoelectron spectroscopies as a function of heating temperature and heating time. The mechanism of electrical conductivity as a function of temperature is consistent with a hopping type carrier transport. The electrical conductivity decreased, as a function of time, in agreement with a granular metal type structure, in which aging is due to the shrinking of the PEDOT conductive grains. XPS and UPS spectra indicate that conformational changes of the PEDOT:PSS film are responsible for this behaviour and a model for these modifications is proposed.
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