Effect of oxidant on the performance of conductive polymer films prepared by vacuum vapor phase polymerization for smart window applications

Brooke, Robert; Fabretto, Manrico; Vucaj, Nastasja; Zuber, Kamil; Switalska, Eliza; Reeks, Lachlan; Murphy, Peter; Evans, Drew

doi:10.1088/0964-1726/24/3/035016

Cited by 24 publications

(22 citation statements)

References 57 publications

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“…With respect to power consumption, we also note that PEDOT:Tos typically has a good optical memory, in the sense that it can remain in a switched state also after disconnecting the power supply. 16 This allows for a lower total power consumption compared to inorganic-based systems that require continuous power to maintain their states. 12,41 Fig.…”

Section: Resultsmentioning

confidence: 99%

“…15 PEDOT exhibits a high optical density blue color in its reduced state and a low optical density transparent blue color in its oxidized state. This makes it an excellent candidate for electrochromic applications in the visible wavelength region, such as smart windows 16,17 for buildings and the automotive industry. 17,18 Comparatively, electrochromism of PEDOT in the IR wavelength range has been only sparsely reported.…”

Section: Introductionmentioning

confidence: 99%

“…17,18 Comparatively, electrochromism of PEDOT in the IR wavelength range has been only sparsely reported. [19][20][21][22][23] While most reports on the electrochromism of PEDOT were limited to the visible and near IR regions, 16,23 many applications (road signs, safety clothing, space craft, etc.) could take advantage of an organic emissive modulator in the IR region.…”

Section: Introductionmentioning

confidence: 99%

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Infrared electrochromic conducting polymer devices

et al. 2017

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The conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) is well known for its electrochromic properties in the visible region. Less focus has been devoted to the infrared (IR) wavelength range, although tunable IR properties could enable a wide range of novel applications. As an example, modern day vehicles have thermal cameras to identify pedestrians and animals in total darkness, but road and speed signs cannot be easily visualized by these imaging systems. IR electrochromism could enable a new generation of dynamic road signs that are compatible with thermal imaging, while simultaneously providing contrast also in the visible region. Here, we present the first metal-free flexible IR electrochromic devices, based on PEDOT:Tosylate as both the electrochromic material and electrodes. Lateral electrochromic devices enabled a detailed investigation of the IR electrochromism of thin PEDOT:Tosylate films, revealing large changes in their thermal signature, with effective temperature changes up to 10 [degree]C between the oxidized (1.5 V) and reduced (-1.5 V) states of the polymer. Larger scale (7 [times] 7 cm) vertical electrochromic devices demonstrate practical suitability and showed effective temperature changes of approximately 7 [degree]C, with good optical memory and fast switching (1.9 s from the oxidized state to the reduced state and 3.3 s for the reversed switching). The results are highly encouraging for using PEDOT:Tosylate for IR electrochromic applications.

Funding agencies: Wenner-Gren Foundations; Swedish Research Council; Swedish Foundation for Strategic Research; AForsk Foundation; Knut and Alice Wallenberg Foundation (Tail of the sun), Vinnova as part of the Swedish national innovation program SIO Graphene; Swedish Gover

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Infrared electrochromic conducting polymer devices

et al. 2017

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“…A separate report investigated the effect of various organic solvent additions to the Fe(Tos) 3 oxidant solution, but none outperformed the ethanol solution. 33 Alcohol based solvents have been used extensively in the VPP of EDOT 3,4,34,35 and several of them were trialled for the best electrical and optical properties of PEDOT. Similar to the studies on PEDOT:Tos, we show that ethanol provides the highest electrical conductivity for PEDOT:Tof before (3250 AE 122 S cm À1 ) and aer acid treatment (4430 AE 168 S cm À1 ) (Fig.…”

Section: Synthesis Of Highly Conductive Pedotmentioning

confidence: 99%

Vapor phase synthesized poly(3,4-ethylenedioxythiophene)-trifluoromethanesulfonate as a transparent conductor material

et al. 2018

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“…Hee et al [7] concluded that electrochromic windows are more suitable for applications in residential areas in cold climate regions. Brooke et al [8] investigated the effect of oxidant on the performance of conductive polymer films. They concluded that the oxidant Fe(Tos) 3 produced superior device performance with respect to optical switching, switch speed and optical relaxation.…”

Section: Introductionmentioning

confidence: 99%

A Spectrally Selective Window for Hot Climates

Sid-Ahmed¹,

Bilal²,

Babiker³

2017

JECTC

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Rigorous coupled-wave analysis has been used to design a glazing for hot climates. The designed glazing is relatively simple and it transmits most of the visible light and reflects most of the infrared radiation. It does not need any external source of energy to control its optical properties. It consists of ITO and four periodic pairs of Si/SiO 2 , deposited on a glass sheet. The optimum thicknesses of ITO, Si and SiO 2 are 0.1 μm, 0.15 and 0.4 μm, respectively. The glazing acts as an optically selective filter. It transmits about 80% of the visible light and reflects almost all the infrared radiation. The performance of the glazing is almost independent of the angle of incidence of solar radiation. This makes it suitable for all hours of the day. The fabrication of the glazing and the testing have been performed at the laboratories of the Faculty of Science, University of Witwatersrand, South Africa. Magnetron sputtering technique has been used for the fabrication. ITO, Si and SiO 2 have been used as sputtering targets. The experimental results are almost identical to the simulation results.

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Effect of oxidant on the performance of conductive polymer films prepared by vacuum vapor phase polymerization for smart window applications

Cited by 24 publications

References 57 publications

Infrared electrochromic conducting polymer devices

Infrared electrochromic conducting polymer devices

Vapor phase synthesized poly(3,4-ethylenedioxythiophene)-trifluoromethanesulfonate as a transparent conductor material

A Spectrally Selective Window for Hot Climates

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