Comparison of organic thermistors based on PEDOT:PSS and PEDOT:tos thin films under various thermal and humidity conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13440%2F18%3A43893910" target="_blank" >RIV/44555601:13440/18:43893910 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/18:43916946 RIV/49777513:23220/18:43952138

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0925400518314576?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925400518314576?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.snb.2018.08.054" target="_blank" >10.1016/j.snb.2018.08.054</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of organic thermistors based on PEDOT:PSS and PEDOT:tos thin films under various thermal and humidity conditions

Popis výsledku v původním jazyce

Flexible organic thermistors based on poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) [PEDOT:PSS] and PEDOT:Fe3+(O - tosylate)(3) [PEDOT:tos, tosylate p-toluenesulfonate] thin films were prepared and their structural and surface properties and the humidity and temperature dependences of their resistance were studied. The surface wettability evaluated by goniometry revealed a considerably higher contact angle (70 degrees) on the PEDOT:tos thin film surface, indicating its hydrophobic nature. In contrast, a large number of polar SO3- groups are present on the surface of the PEDOT:PSS thin film, proving its overall wettability. The results obtained from atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) together with electrokinetic analysis indicate expressly different surface charges (and chemistry) for the two films tested. The absence of sulfonic acid in the PEDOT:tos thermistor markedly enhances its humidity stability in the range of 20-90% RH, as confirmed during the humidity and temperature tests. Moreover, exposure of both thermistors to step-wise change in temperature showed that the PEDOT:tos thermistor features a notably higher change in resistance Delta R/R(0 )than the PEDOT:PSS thermistor. These observations suggest that structures based on PEDOT:Fe3+ (O - tosylate)(3) are promising candidates for the low-cost construction of flexible printed organic thermistors.

Název v anglickém jazyce

Comparison of organic thermistors based on PEDOT:PSS and PEDOT:tos thin films under various thermal and humidity conditions

Popis výsledku anglicky

Flexible organic thermistors based on poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) [PEDOT:PSS] and PEDOT:Fe3+(O - tosylate)(3) [PEDOT:tos, tosylate p-toluenesulfonate] thin films were prepared and their structural and surface properties and the humidity and temperature dependences of their resistance were studied. The surface wettability evaluated by goniometry revealed a considerably higher contact angle (70 degrees) on the PEDOT:tos thin film surface, indicating its hydrophobic nature. In contrast, a large number of polar SO3- groups are present on the surface of the PEDOT:PSS thin film, proving its overall wettability. The results obtained from atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) together with electrokinetic analysis indicate expressly different surface charges (and chemistry) for the two films tested. The absence of sulfonic acid in the PEDOT:tos thermistor markedly enhances its humidity stability in the range of 20-90% RH, as confirmed during the humidity and temperature tests. Moreover, exposure of both thermistors to step-wise change in temperature showed that the PEDOT:tos thermistor features a notably higher change in resistance Delta R/R(0 )than the PEDOT:PSS thermistor. These observations suggest that structures based on PEDOT:Fe3+ (O - tosylate)(3) are promising candidates for the low-cost construction of flexible printed organic thermistors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Sensors and Actuators. B - Chemical

ISSN

0925-4005

e-ISSN

—

Svazek periodika

2018

Číslo periodika v rámci svazku

275

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

7

Strana od-do

359-366

Kód UT WoS článku

000445264000044

EID výsledku v databázi Scopus

2-s2.0-85051734133