Enhancing the performance of poly(3-methylthiophene)-based electrochromic devices via insertion of a TiO2 buffer layer

Yang, Chien‐Hsin; Lo, Yu‐Chun; Huang, Po-Ling; Lin, Chun-Chu; Wu, Kaiming; Wang, Tzong-Liu; Shieh, Yeong‐Tarng; Chen, Wen-Janq

doi:10.1016/j.jelechem.2011.07.023

Cited by 10 publications

(3 citation statements)

References 15 publications

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“…In [22], the response time was faster than other references because measured method which was galvanostatic, but the PMeT thin film was not homogeneous so that the polymer had short lifetime. In [23], the TiO mesoporous films enhanced the adhesion of PMeT polymers to the TiO /ITO substrate, thereby increased the long-term stability of the corresponding electrochromic devices. In [24], the PEDOT:PSS served as a transparent conductive binder for nano-ZnHCF, also acted like a pseudo-capacitor that holds electric charge for facile electron transfer between the nanoparticles.…”

Section: G Pmet Thin Film Comparison With Other Literaturesmentioning

confidence: 99%

The Investigation of ZnO Nanowires/ITO/Glass Substrate on Electrochromic Properties for PMeT Thin Film

Chou

Yang

Liao

et al. 2015

J. Display Technol.

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In this study, the poly(3-methylthiophene) (PMeT) of the electrochromic thin films had been deposited on the zinc oxide nanowires/indium tin oxide/glass (ZnO nanowires/ITO/Glass) substrate by cyclic vltammetry (CV). First, the ZnO seed-layer was deposited on ITO/Glass by RF sputtering. The ZnO nanowires were grown for different growth time on the ZnO seed-layer by chemical bath deposition (CBD), and the aspect ratios were investigated. The PMeT thin films were deposited on ITO/Glass and ZnO nanowires/ITO/Glass by cyclic vltammetry. The electrochromic thin films ZnO nanowires/ITO/Glass was analyzed optical and electrochemical properties by photonic spectrometer, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry. We found that the PMeT thin films were deposited on ZnO nanowires/ITO/Glass, which the optimal growth time of the ZnO nanowires was 9 h that could obtain transmittance variation % % , optical density change , and the response time s s .

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Section: G Pmet Thin Film Comparison With Other Literaturesmentioning

confidence: 99%

The Investigation of ZnO Nanowires/ITO/Glass Substrate on Electrochromic Properties for PMeT Thin Film

Chou

Yang

Liao

et al. 2015

J. Display Technol.

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“…Among conducting polymers, poly(3,4-ethylenedioxythiophene) (PEDOT) is superior to other organic materials in many crucial categories such as low oxidation potential, good stability to air exposure, electrochemical stability and fast switching speed [1] . Owing to these particular properties, PEDOT can be used in electrochromic auto-dimming rear view mirror [2] , conductive ink [3] , electronic paper [4] , displayer [5] , and so on. But during the application, the simple color change of PEDOT (only light blue to dark blue) has limited its development.…”

Section: Introductionmentioning

confidence: 99%

Electrochromic Porperties of Fluorescent Dye Doped Poly(3,4-ethylenedioxythiophene) with Different Polymerization Times

Liang

2015

AMR

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The electrochromic properties of an electrochemical polymerized composite consisted of poly (3,4-ethylenedioxythiophene) doped with fluorescent yellow dye (PEDOT-FY) with different polymerization time are reported. The structures of PEDOT-FY were characterized via cycle voltammograms and spectroelectrochemistry. The PEDOT-FY films can appears orange-yellow and purple in the neutral state, and yellow-green and deep green in the oxidized state. Polymerizing for 6 min, the PEDOT-FY film comes out a new pair of oxidative and reductive peaks around 0.3V and-0.15V. In addition, the PEDOT-FY films also have short response times. It is shown that acid dye doping is an effective method to broaden the color change range of the electrochromic mateials.

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“…It is inevitable for all CPs-based ECDs to experience degradation of performances during the repeated doping/dedoping process. 18 As for organic/inorganic composite ECDs, however, the good adhesion to the electrode and excellent thermal stability of inorganic materials can help to increase the long-term stability of EC materials.…”

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confidence: 99%

Electrochemical Fabrication of Poly(1,4-bis(2-thienyl)-benzene)/ZnO Nanoridge Composite Film with Enhanced Electrochromic Performance

Lv¹,

Hu²,

Sun³

et al. 2012

J. Electrochem. Soc.

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Poly(1,4-bis(2-thienyl)-benzene) (PBTB) is electrochemically synthesized on ZnO-coated electrode to form PBTB/ZnO nanocomposite electrochromic film. The composite film exhibits a noticeable electrochromism with reversible color changes from yellow (neutral state) to green (oxidized state). From SEM images, PBTB/ZnO nanocomposite film presents the smooth and even surface, which is different from the morphology of the ZnO nanoridges with average width of about 50-100 nm. Spectroelectrochemical analysis reveals that the composite film has fast switching time of 0.9 s (2 s for pure PBTB film) at 1100 nm. Moreover, it can retain up 90% (50% for pure PBTB film) of its original electroactivity after 300 cycles stability measurement. All the results demonstrate that the electrochromic performances are significantly enhanced through incorporating PBTB with ZnO nanoridges. Accordingly, nanocomposite structure plays an essential role in improving electrochromic switching time and long-term stability of electrochromic materials due to shorter counterion diffusion distance and good adhesion to the electrode.Electrochromism is broadly defined as reversible optical changes of a material due to the electrochemical oxidation or reduction upon an applied electric field. 1,2 There are various potential applications toward electrochromic devices (ECDs), such as smart windows, 3 reflectance mirrors, 4 thin flat panel displays 5 and memory devices. 6 Conducting polymers (CPs) as an important class of electrochromic materials have gained popularity due to low cost, good processibility, multicolor display property and high optical contrast ratio. 7-9 However, practical applications of the CPs-based ECDs have been limited by their low coloration efficiency, slow switching speed and poor longterm stability. Therefore, extensive research has been launched into the development of electrochromic composite materials, 10 especially for composite films consisting of conducting polymers and inorganic nanomaterials since they can combine the advantages of both components and may offer special properties through the reinforcement or modification of each other. 11 As well-known, some research has been done to improve electrochromic performances. For example, Ho reported enhanced optical contrast of PANI/SiO 2 composite films 12 and higher coloration efficiency of PANI/CNTs system. 13 Xu studied carbon nanotubes assisted polyoxometalate nanocomposite film with higher coloration efficiency. 14 Li fabricated PEDOT/TiO 2 and PMeT/TiO 2 nanocompostie electrode based electrochromic devices with enhanced long term stability. 15,16 These efforts significantly improve the performance of the CPs-based ECDs, but there is still little further research on improving switching time of electrochromic materials via organic-inorganic composite.As one of the most important parameters of ECDs, the switching time is strongly dependent on the counterion-transport rate in the electrochromic layer. The way to overcome the slow switching rate of the CPs-based ECDs is to de...

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Enhancing the performance of poly(3-methylthiophene)-based electrochromic devices via insertion of a TiO2 buffer layer

Cited by 10 publications

References 15 publications

The Investigation of ZnO Nanowires/ITO/Glass Substrate on Electrochromic Properties for PMeT Thin Film

The Investigation of ZnO Nanowires/ITO/Glass Substrate on Electrochromic Properties for PMeT Thin Film

Electrochromic Porperties of Fluorescent Dye Doped Poly(3,4-ethylenedioxythiophene) with Different Polymerization Times

Electrochemical Fabrication of Poly(1,4-bis(2-thienyl)-benzene)/ZnO Nanoridge Composite Film with Enhanced Electrochromic Performance

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