Preparation of an EDOT-based polymer: optoelectronic properties and electrochromic device application

Soganci, Tugba; Kurtay, Gülbin; Ak, Metin; Güllü, Mustafa

doi:10.1039/c4ra13060j

Cited by 26 publications

(16 citation statements)

References 26 publications

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“…Moreover, Figure 2b shows the two bands at positive potentials of + 0.85, + 1.2 V and at negative of À0.50 V vs Ag/Ag + , which corresponds to the radical cation (polaronic), dication (bipolaronic) and radical anion states of pDAE, respectively. [30,31] Moreover, an operational stability of pDAE was investigated upon repetitive cycling between the oxidized and reduced states and integrating the area of cycling voltammograms, which corresponds to the electric current passed in one cycle. The increase in current density with each consecutive cycle is attributed to the formation pDAE on the surface of ITO electrode.…”

Section: Synthesismentioning

confidence: 99%

“…When the peak current values in the graph of cyclic voltammetry are plotted versus the scan rates, linearity of the graph exhibits that the polymer adheres well to the electrode surface and the electrochemical processes are not controlled by the diffusion rate of the electrolyte (inset graph in the Figure 2c). [30,31] Moreover, an operational stability of pDAE was investigated upon repetitive cycling between the oxidized and reduced states and integrating the area of cycling voltammograms, which corresponds to the electric current passed in one cycle. [32,33] It was observed that the polymer maintains both an electrochemical activity and electrochromic behaviour, yet 28 percent decrease in passed electric charge after the 500 switching cycles as depicted in Figure 2d, indicates relatively poor operational stability and a tendency to degrade.…”

Section: Synthesismentioning

confidence: 99%

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Experimental and Theoretical Investigations of an Electrochromic Azobenzene and 3,4‐Ethylenedioxythiophene‐based Electrochemically Formed Polymeric Semiconductor

et al. 2018

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An electrochromic material based on azobenzene and 3,4-ethylenedioxythiophene (EDOT) semiconducting layer was electrochemically deposited on an indium tin oxide coated glass electrode. Chemical synthesis of the azobenzene and EDOT-based chromophore (DAE) and electrochemical formation of its corresponding polymer (pDAE) are reported. The electrochromic properties of the synthesized polymer pDAE were investigated by electrochemical and spectroelectrochemical methods. pDAE exhibited an optical bandgap of 1.82 eV and three distinct colored states in its reduced, neutral, and oxidized forms. The pDAE polymer showed 44 % optical contrast at 710 nm between its reduced and oxidized states and a fast electrochromic switching time of 1.0 s. The frontier molecular orbitals, Raman shifts, and semiconducting properties of this electrochromic polymer were evaluated by density functional theory calculations. The optical absorption bands of the polymer charged states were assigned and investigated.

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Section: Synthesismentioning

confidence: 99%

Section: Synthesismentioning

confidence: 99%

Experimental and Theoretical Investigations of an Electrochromic Azobenzene and 3,4‐Ethylenedioxythiophene‐based Electrochemically Formed Polymeric Semiconductor

et al. 2018

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“…EC materials exhibit electrochemical effect where an electroactive material undergoes redox reaction, and thus there is a reversible color change upon applying a low DC voltage. [16][17] Therefore, EC materials control the amount of light passing through windows, so-called EC windows, smart windows or smart glass. A smart glass should meet these requirements: when the glass is transparent, it should have a high optical transmittance.…”

Section: Introductionmentioning

confidence: 99%

Smart OLED Lighting on Electrochromic Glass

Liu

et al. 2018

Physica Status Solidi (a)

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Smart organic light‐emitting diodes (OLEDs) prepared on poly(3,4‐ethylenedioxythiophene) (PEDOT)‐based electrochromic glass is demonstrated for the first time. In this work, electrochromic glass based on PEDOT is adopted as a substrate for OLED and used for tuning the light‐emitting direction. The color of the glass changes from pale blue to dark blue upon the application of an external voltage. The coloration or discoloration is due to reaction of the redox solution with PEDOT. Therefore, the utilization of this coloration or discoloration of the glass substrate can adjust the light‐emitting direction of OLED. When the glass is tuned to semi‐transparent, it causes the dual‐side emitting device to display a graceful spatial impression. When the glass becomes highly opaque, the device exhibits top emission with a significantly enhanced luminance efficiency, in which the current efficiencies can be increased twice compared with those when the smart glass was switched off. For the green device, the current efficiency increases from 9.5 to 19.0 cd A−1. For the white device, it increases from 7.5 to 15.5 cd A−1. The authors believe that the combination of smart glass and OLED is a new concept for future OLED lighting applications.

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“…because of their highly π-conjugated polymeric chains and metal like conductivity [1]- [4]. The optical properties of conducting polymers [5]- [7] are as important as electrical properties because they allow number of applications such as sensing [8]- [10], displays and other opto-electronic applications [11] [12]. Along with various advantages, these pristine conducting polymers have several drawbacks such as poor emission, processability and stability.…”

Section: Introductionmentioning

confidence: 99%

Highly Fluorescent Conducting Polymer Hybrid Materials Based on Polyaniline-Polyethylene Glycol-Arsenic Sulphide

Singh

Gupta

et al. 2016

IJOC

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Highly fluorescent binary and ternary hybrid materials based on polyaniline, polyethylene glycol (PEG) and arsenic sulphide have been prepared via oxidative chemical polymerization and characterized by FT-IR and powder X-ray diffraction techniques. Thermogravimetric analysis showed that all the materials are thermally stable up to 250˚C. The optical behaviour was investigated using UV-Vis. and fluorescence spectroscopy. Fluorescence spectra of polyaniline and its hybrids were found to be concentration dependent, and concentrations were optimized to achieve maximum intensity of emission. Aggregation caused quenching (ACQ) may be the possible reason for concentration dependent emission. Hybrids showed significantly enhanced fluorescence than polyaniline. The AC electrical conductivity was also measured and found to be better for hybrids than the polyaniline. In the PAni-PEG-As2S3 hybrid, the conductivity was found to be 9.57 × 10 −1 S/cm at 100 KHz. This valuable improvement in luminescent property and conducting behaviour may be useful in various optoelectronic and electronic applications.

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Preparation of an EDOT-based polymer: optoelectronic properties and electrochromic device application

Abstract: Spectroelectrochemistry graph of a novel TPA/DTD electrochromic device.

Cited by 26 publications

References 26 publications

Experimental and Theoretical Investigations of an Electrochromic Azobenzene and 3,4‐Ethylenedioxythiophene‐based Electrochemically Formed Polymeric Semiconductor

Experimental and Theoretical Investigations of an Electrochromic Azobenzene and 3,4‐Ethylenedioxythiophene‐based Electrochemically Formed Polymeric Semiconductor

Smart OLED Lighting on Electrochromic Glass

Highly Fluorescent Conducting Polymer Hybrid Materials Based on Polyaniline-Polyethylene Glycol-Arsenic Sulphide

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