Relationship between Charge Transfer Diffusion Coefficients and Doping Level for electro generated thin PEDOT films on ITO

Palma-Cando, Alex; Frontana‐Uribe, Bernardo A.; Varela-Guerrero, Víctor

doi:10.21931/rb/cs/2019.02.01.8

Cited by 3 publications

(2 citation statements)

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“…Since the dawn of the intrinsically conducting polymers (ICPs) in the late 1970s [1,2], electrochemistry has been a powerful tool, not only for synthesis of polymer films but also for in situ characterization of (semi)conducting materials [3,4]. Electrochemical generation of ICPs is based mainly on the oxidative condensation of different aromatic heterocycles and derivatives through the formation of radical cations [5].…”

Section: Introductionmentioning

confidence: 99%

Thin Functional Polymer Films by Electropolymerization

et al. 2019

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Intrinsically conducting polymers (ICPs) have been widely utilized in organic electronics, actuators, electrochromic devices, and sensors. Many potential applications demand the formation of thin polymer films, which can be generated by electrochemical polymerization. Electrochemical methods are quite powerful and versatile and can be utilized for investigation of ICPs, both for educational purposes and materials chemistry research. In this study, we show that potentiodynamic and potentiostatic techniques can be utilized for generating and characterizing thin polymer films under the context of educational chemistry research and state-of-the-art polymer research. First, two well-known bifunctional monomers (with only two linking sites)—aniline and bithiophene—and their respective ICPs—polyaniline (PANI) and polybithiophene (PBTh)—were electrochemically generated and characterized. Tests with simple electrochromic devices based on PANI and PBTh were carried out at different doping levels, where changes in the UV-VIS absorption spectra and color were ascribed to changes in the polymer structures. These experiments may attract students’ interest in the electrochemical polymerization of ICPs as doping/dedoping processes can be easily understood from observable color changes to the naked eye, as shown for the two polymers. Second, two new carbazole-based multifunctional monomers (with three or more linking sites)—tris(4-(carbazol-9-yl)phenyl)silanol (TPTCzSiOH) and tris(3,5-di(carbazol-9-yl)phenyl)silanol (TPHxCzSiOH)—were synthesized to produce thin films of cross-linked polymer networks by electropolymerization. These thin polymer films were characterized by electrochemical quartz crystal microbalance (EQCM) experiments and nitrogen sorption, and the results showed a microporous nature with high specific surface areas up to 930 m2g−1. PTPHxCzSiOH-modified glassy carbon electrodes showed an enhanced electrochemical response to nitrobenzene as prototypical nitroaromatic compound compared to unmodified glassy carbon electrodes.

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Section: Introductionmentioning

confidence: 99%

Thin Functional Polymer Films by Electropolymerization

et al. 2019

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“…In this work, recycled ITO electrodes used as anodes in organic photovoltaic devices [37][38][39][40] were submitted to a one-step treatment with piranha solution (H 2 SO 4 :H 2 O 2 , 4:1 V/V) at room temperature. These recovered electrodes (ITO PS ) were characterized by cyclic voltammetry as well as SEM, XPS and UV-vis verifying its potential reuse.…”

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confidence: 99%