Kuş, MahmutOkur, Salih2016-10-172016-10-172009Kuş, M. and Okur, S. (2009). Electrical characterization of PEDOT:PSS beyond humidity saturation. Sensors and Actuators, B: Chemical, 143(1), 177-181. doi:10.1016/j.snb.2009.08.0550925-40050925-4005http://dx.doi.org/10.1016/j.snb.2009.08.055https://hdl.handle.net/11147/2251PEDOT:PSS humidity sensor was fabricated using a drop-casting method between thermally evaporated gold electrodes with 30 μm separation and 300 μm channel width on a glass substrate. AC, DC resistivity, and AFM techniques were used to characterize the PEDOT:PSS humidity sensor in the same environmental conditions. The change of resistivity was monitored with increasing relative humidity (RH) up to 90%. The resistivity increases linearly up to a maximum value, and then it starts to decrease abruptly above 80% relative humidity (RH) after saturation of water uptake. The decrease in resistivity above 80% RH seems to be due to the water meniscus layer formed on the saturated PEDOT:PSS film. Below 80% RH, the device works like a humidity sensor.eninfo:eu-repo/semantics/openAccessConducting polymerHumidity sensorsPEDOT:PSSResistivityAtmospheric humidityArticle2-s2.0-7184910706410.1016/j.snb.2009.08.05510.1016/j.snb.2009.08.055