Investigate the effects of EG doping PEDOT/PSS on transmission and anti-reflection properties using terahertz pulsed spectroscopy

Sun, Yiwen; Yang, Shengxin; Du, Pengju; Yan, Fei; Qu, Junle; Zhu, Zexuan; Zuo, Jian‐Min; Zhang, Cunlin

doi:10.1364/oe.25.001723

Cited by 15 publications

(12 citation statements)

References 31 publications

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“…Based on the observations above, we chose the 1 µm thick pristine PEDOT: PSS layer for THz phase shifter applications as TCEs. We note that the present 1 µm thick pristine PEDOT: PSS layer exhibits a much higher THz transmittance as compared with published reports [14,15]. It is possible that different manufactured batches of pristine PEDOT could have subtle differences in the THz optical properties.…”

Section: Resultssupporting

confidence: 54%

“…Further analysis is needed to ascertain the observed phenomena. In addition, the THz transmittance achieved is much higher than those for DMSO-and EG-doped PEDOT: PSS thin layers, where their thicknesses are only approximately 31 and 34 nm, respectively [14,15].…”

Section: Resultsmentioning

confidence: 83%

“…The THz transmittance and conductivity of PEDOT: PSS thin film doped with either dimethyl sulfoxide (DMSO) or ethylene glycol (EG) have also been investigated. Sun et al [14] reported that PEDOT: PSS thin films doped with 10% EG and with thicknesses between 34 and 102 nm exhibited transmission between 62% and 83% in the frequency range of 0.3-1.2 THz. Moreover, Yan et al [15] reported that 6% DMSO-doped PEDOT: PSS thin film with thicknesses between 31 and 129 nm showed transmission between 30% and 72% in the frequency range of 0.5-2.5 THz.…”

Section: Introductionmentioning

confidence: 99%

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Twisted Nematic Liquid-Crystal-Based Terahertz Phase Shifter using Pristine PEDOT: PSS Transparent Conducting Electrodes

et al. 2019

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For this study, we demonstrated three different types of twisted nematic (TN) liquid crystal (LC) terahertz (THz) phase shifters using pristine poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT: PSS) thin films as transparent conducting electrodes (TCEs). The transmittance of spin-coated pristine PEDOT: PSS thin film was as high as 92% in the frequency range of 0.2–1.2 THz. This is among the highest reported. Several TN-LC cells were constructed in a comparative study, which confirmed the reliability of pristine PEDOT: PSS as a TCE layer for THz phase shifter applications. The highest phase shift, required root-mean-square (RMS) driving voltage, and threshold voltage achieved by devices tested were 95.2° at 1 THz, 7.2 VRMS, and 0.5 VRMS, respectively. The thickness of the LC layer for the phase shifter was 250 µm, approximately half as thick as previous designs. In addition, the pristine PEDOT: PSS-based TN-LC phase shifter exhibited a figure-of-merit (FOM) value of approximately 6.65 degree·dB−1·V−1. This compared favorably with previously reported homogeneously aligned phase shifters with an FOM of 2.19 degree·dB−1·V−1. Our results indicated that a twisted nematic LC cell with pristine PEDOT: PSS thin films as electrodes is a good combination for a THz phase shifter and wave plates as well as other LC-based THz devices.

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Section: Resultssupporting

confidence: 54%

Section: Resultsmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

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Twisted Nematic Liquid-Crystal-Based Terahertz Phase Shifter using Pristine PEDOT: PSS Transparent Conducting Electrodes

et al. 2019

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“…[1][2][3] Several researchers have paid their attention towards the development of polymer thin lm-based sensors by doping the thin lms with small quantities of polar solvents, such as DMSO, ethylene glycol, DMF and sorbitol, due to their unique electrical resistivity and selective gas sensing properties. [4][5][6] For instance, the doping of ZnO into PEDOT-PSS has reasonably improved the gas sensitivity, response and recovery time for sensing LPG.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive ethylene glycol-doped PEDOT–PSS organic thin films for LPG sensing

Pasha¹,

Khasim

Al‐Hartomy

et al. 2018

RSC Adv.

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In this study, for the first time we report the fabrication of low-cost ethylene glycol (EG)-doped PEDOT-PSS (poly 3,4-ethylenedioxythiophene:polystyrene sulfonate) organic thin film sensors for the detection of LPG at room temperature. The prepared thin films were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-Vis) spectroscopy and thermogravimetric analysis (TGA) techniques for the analysis of their structural and morphological features. The doping of EG strongly improved the conductivity of pure PEDOT-PSS films by three orders of magnitude. The gas sensing responses of pristine and doped PEDOT-PSS thin films were investigated at room temperature by fabricating a sensor device on an ITO-coated glass substrate. The gas sensing characteristics of the prepared thin films were investigated for liquified petroleum gas (LPG), dimethyl propane, methane and butane test gases. The EG-doped PEDOT-PSS thin films exhibited excellent sensitivity for all the test gases, especially towards LPG, at room temperature. The sensitivity of the doped PEDOT-PSS films was recorded to be >90% for LPG with improved response and recovery time. The stability study indicated that the sensing response of doped PEDOT-PSS thin films was highly stable over a period of 30 days. Due to enhanced sensitivity, stability and fast response and recovery times, these EG-doped PEDOT-PSS thin films can be used in gas sensor technology, especially towards the detection of LPG at room temperature.

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“…A dopant is typically introduced during the synthesis of CPs, to produce favourable electrical characteristics. Dimethyl sulfoxide (DMSO), ethylene glycol (EG), sulfuric acid (H 2 SO 4 ), phytic acid, and p -Toluenesulfonic acid ( p TSA) are commonly employed as dopants [ 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 ]. In their research of crosslinked porous 3D hydrogel–PEDOT CP scaffolds, Mawad et al (2016) mixed all of the required chemicals, followed by a filtration process [ 55 ].…”

Section: Techniques In Fabricating Electrically Conductive Scaffoldsmentioning

confidence: 99%

Advocating Electrically Conductive Scaffolds with Low Immunogenicity for Biomedical Applications: A Review

et al. 2021

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Scaffolds support and promote the formation of new functional tissues through cellular interactions with living cells. Various types of scaffolds have found their way into biomedical science, particularly in tissue engineering. Scaffolds with a superior tissue regenerative capacity must be biocompatible and biodegradable, and must possess excellent functionality and bioactivity. The different polymers that are used in fabricating scaffolds can influence these parameters. Polysaccharide-based polymers, such as collagen and chitosan, exhibit exceptional biocompatibility and biodegradability, while the degradability of synthetic polymers can be improved using chemical modifications. However, these modifications require multiple steps of chemical reactions to be carried out, which could potentially compromise the end product’s biosafety. At present, conducting polymers, such as poly(3,4-ethylenedioxythiophene) poly(4-styrenesulfonate) (PEDOT: PSS), polyaniline, and polypyrrole, are often incorporated into matrix scaffolds to produce electrically conductive scaffold composites. However, this will reduce the biodegradability rate of scaffolds and, therefore, agitate their biocompatibility. This article discusses the current trends in fabricating electrically conductive scaffolds, and provides some insight regarding how their immunogenicity performance can be interlinked with their physical and biodegradability properties.

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Investigate the effects of EG doping PEDOT/PSS on transmission and anti-reflection properties using terahertz pulsed spectroscopy

Cited by 15 publications

References 31 publications

Twisted Nematic Liquid-Crystal-Based Terahertz Phase Shifter using Pristine PEDOT: PSS Transparent Conducting Electrodes

Twisted Nematic Liquid-Crystal-Based Terahertz Phase Shifter using Pristine PEDOT: PSS Transparent Conducting Electrodes

Highly sensitive ethylene glycol-doped PEDOT–PSS organic thin films for LPG sensing

Advocating Electrically Conductive Scaffolds with Low Immunogenicity for Biomedical Applications: A Review

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