The reversibility of ionic transport in PEDOT with application to a complementary electrochromic device

Chiang, Tun-Yuan; Huang, Ming-Chao; Tsai, Chien-Huang

doi:10.1016/j.apsusc.2014.04.157

Cited by 10 publications

(6 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to decrease the switching time that is a rate of dopant ion diffusion [57] the electrochromic layers of PANI and PB were chosen as complementary to PEDOT:PSS electrochromic coating. PB during oxidation changed colour from transparent to blue [31,32]; PANI changed from transparent-yellow to green and blue [58,59] while PEDOT:PSS from blue to transparent [60]. Thus, PEDOT: PSS changed to blue at the same time when PB or PANI.…”

Section: Resultsmentioning

confidence: 82%

Hydroxypropyl cellulose-based gel electrolyte for electrochromic devices

Ledwon

Andrade

Łapkowski

et al. 2015

Electrochimica Acta

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 82%

Hydroxypropyl cellulose-based gel electrolyte for electrochromic devices

Ledwon

Andrade

Łapkowski

et al. 2015

Electrochimica Acta

View full text Add to dashboard Cite

“…Because of the self-doping of the CP, mobile counterions in the surrounding tissue can be redistributed along the backbone of the CP to compensate the injected electronic charge. As a result, the mobile counterions can diffuse, leading to ionic current in the CP. − In addition, porous CP films promote effective ion exchange between the recording site and the surrounding tissue. These films can also transduce ionic current into electronic current via an efficient redox reaction, minimizing the charge transfer resistance at the recording site, again lowering the impedance of the recording site. − …”

Section: Resultsmentioning

confidence: 99%

Enhancement of Interface Characteristics of Neural Probe Based on Graphene, ZnO Nanowires, and Conducting Polymer PEDOT

Ryu¹,

Yang²,

Ahn³

et al. 2017

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

In the growing field of brain-machine interface (BMI), the interface between electrodes and neural tissues plays an important role in the recording and stimulation of neural signals. To minimize tissue damage while retaining high sensitivity, a flexible and a smaller electrode with low impedance is required. However, it is a major challenge to reduce electrode size while retaining the conductive characteristics of the electrode. In addition, the mechanical mismatch between stiff electrodes and soft tissues creates damaging reactive tissue responses. Here, we demonstrate a neural probe structure based on graphene, ZnO nanowires, and conducting polymer that provides flexibility and low impedance performance. A hybrid Au and graphene structure was utilized to achieve both flexibility and good conductivity. Using ZnO nanowires to increase the effective surface area drastically decreased the impedance value and enhanced the signal-to-noise ratio (SNR). A poly[3,4-ethylenedioxythiophene] (PEDOT) coating on the neural probe improved the electrical characteristics of the electrode while providing better biocompatibility. In vivo neural signal recordings showed that our neural probe can detect clearer signals.

show abstract

“…Considering the volatility of HCl, it is hard to conduct a time-consuming stability test in the original open system, so a new measurement EQCM comes into play, which is used to test the mass changes of the electrochromic films in the CV scan between −0.2 and +0.6 V. A fluid solution of 1.0 mol/L hydrochloric acid acts as the electrolyte, and the Au electrode with the Ti adhesion layer serves as the conductive substrate. The mass changes per active area can be calculated by the Sauerbrey equation (): where N is the shear modulus of quartz, r q is the density of the crystal, f 0 is the resonant frequency of the fundamental mode of the crystal, Δ f is the resonant frequency shift during CV cycles, and n is the frequency multiplier …”

Section: Resultsmentioning

confidence: 99%

“…However, the unsatisfactory cycling stability of ECP is one of the main reasons restricting their practical application. Structural damage and irreversible redox reactions are primary causes for the performance degradation of ECP. − Different methods have been applied to improve the stability of ECP, such as physical or chemical bonding between the electrochromic film and conductive substrate, cross-linking of the electrochromic chain, and compounding ECP with organic/inorganic nanomaterials. − …”

Section: Introductionmentioning

confidence: 99%

“…The process of mass loss may be the shedding of unbound molecules, and the following mass increase may be caused by ion trapping. 5,31 The ion-adsorption (or ion-desorption) mass and Δm (mass difference per active area) retention of Bi(p)-(Ani) 4 3. Δm max and Δm 400 mean the maximal mass difference and the mass difference of the 400th cycle.…”

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multiarm Aniline Oligomers: Molecular Architecture, Self-Assembly, and Electrochromic Performance

Wang

Fan

et al. 2020

J. Phys. Chem. C

View full text Add to dashboard Cite

Solution-processable aniline oligomers with a benzene ring as the core and para, meta, and triple substituted amino/carboxylcapped tetraaniline (NH 2 -(Ani) 4 -COOH) as arms, named as Bi(p)-(Ani) 4 -COOH, Bi(m)-(Ani) 4 -COOH, and Tri-(Ani) 4 -COOH, were synthesized and characterized. It was found that aniline oligomers with increased arms presented a more regular porous breathing structure revealed by atomic force microscopy. An electrochemical quartz crystal microbalance was used to study their long-term stability by recording the mass change of electrochromic films during redox and analyze the mechanism of ion conduction in the electrochromic process. The results suggested that the porous breathing structure was conducive to H + conduction, which contributed to their improved performance in switching time, coloration efficiency, and cycling stability. Tri-(Ani) 4 -COOH had the shortest switching time (t b = 1.45 s, t c = 1.82 s), highest coloration efficiency (190.7 cm 2 /C), and best cycling stability. Especially on the conductive glass, in 0.5 mol/L sulfuric acid electrolyte, it reached the charge retention of 96.8% after 3000 cycles, implying that the multiarm star-shaped aniline oligomer will be a promising material in electrochromic area with good processability, short switching time, and high cycling stability.

show abstract

The reversibility of ionic transport in PEDOT with application to a complementary electrochromic device

Cited by 10 publications

References 25 publications

Hydroxypropyl cellulose-based gel electrolyte for electrochromic devices

Hydroxypropyl cellulose-based gel electrolyte for electrochromic devices

Enhancement of Interface Characteristics of Neural Probe Based on Graphene, ZnO Nanowires, and Conducting Polymer PEDOT

Multiarm Aniline Oligomers: Molecular Architecture, Self-Assembly, and Electrochromic Performance

Contact Info

Product

Resources

About