TY - JOUR
T1 - Liquid electrolyte positioning along the device channel influences the operation of Organic Electro-Chemical Transistors
AU - D'angelo, Pasquale
AU - Coppedè, Nicola
AU - Tarabella, Giuseppe
AU - Romeo, Agostino
AU - Gentile, Francesco T.
AU - Iannotta, Salvatore
AU - Di Fabrizio, Enzo M.
AU - Mosca, Roberto
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work has been supported by the Project BioNiMed (Multifunctional Hybrid Nanosystems for Biomedical Applications) from Fondazione Cassa di Risparmio di Parma (CARIPARMA) and by the N-Chem project within the CNR-NANOMAX Flagship program.
PY - 2014/11
Y1 - 2014/11
N2 - In this work, we show the influence of the liquid electrolyte adsorption by porous films made of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate), PEDOT:PSS, on the operation of an Organic Electro-Chemical Transistor with an active channel based on these polymeric films. In particular, the effect of film hydration on device performance is evaluated by studying its electrical response as a function of the spatial position between the electrolyte and the channel electrodes. This is done by depositing a PEDOT:PSS film on a super-hydrophobic surface aimed at controlling the electrolyte confinement next to the electrodes. The device response shows that the confinement of ionic liquids near to the drain electrode results in a worsening of the current modulation. This result has been interpreted in the light of studies dealing with the transport of ions in semiconducting polymers, indicating that the electrolyte adsorption by the polymeric film implies the formation of liquid pathways inside its bulk. These pathways, in particular, affect the device response because they are able to assist the drift of ionic species in the electrolyte towards the drain electrode. The effect of electrolyte adsorption on the device operation is confirmed by means of moving-front measurements, and is related to the reproducibility of the device operation curves by measuring repeatedly its electrical response.
AB - In this work, we show the influence of the liquid electrolyte adsorption by porous films made of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate), PEDOT:PSS, on the operation of an Organic Electro-Chemical Transistor with an active channel based on these polymeric films. In particular, the effect of film hydration on device performance is evaluated by studying its electrical response as a function of the spatial position between the electrolyte and the channel electrodes. This is done by depositing a PEDOT:PSS film on a super-hydrophobic surface aimed at controlling the electrolyte confinement next to the electrodes. The device response shows that the confinement of ionic liquids near to the drain electrode results in a worsening of the current modulation. This result has been interpreted in the light of studies dealing with the transport of ions in semiconducting polymers, indicating that the electrolyte adsorption by the polymeric film implies the formation of liquid pathways inside its bulk. These pathways, in particular, affect the device response because they are able to assist the drift of ionic species in the electrolyte towards the drain electrode. The effect of electrolyte adsorption on the device operation is confirmed by means of moving-front measurements, and is related to the reproducibility of the device operation curves by measuring repeatedly its electrical response.
UR - http://hdl.handle.net/10754/563819
UR - https://linkinghub.elsevier.com/retrieve/pii/S1566119914003577
UR - http://www.scopus.com/inward/record.url?scp=84907192480&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2014.08.029
DO - 10.1016/j.orgel.2014.08.029
M3 - Article
SN - 1566-1199
VL - 15
SP - 3016
EP - 3023
JO - Organic Electronics
JF - Organic Electronics
IS - 11
ER -