Graphene effects on the structural, morphological and optical properties of PEDOT:PSS thin films

Jebur, Sura.K.; Braihi, Auda J.; Hassan, Ali Saleh

doi:10.1016/j.matpr.2021.09.255

Cited by 9 publications

(3 citation statements)

References 11 publications

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“…In addition, a broad and slight peak centered at 25.5°is ascribed to the PEDOT:PSS shell, which has a semiamorphous structure. 43,44 Furthermore, the UV−visible (UV−vis) absorption spectrum from 300 to 800 nm is measured to ensure the light harvesting capacity of the CdS NRs and the PEDOT:PSS layer. As shown in Figure 2f, light with wavelengths below and above 570 nm is mainly absorbed by the CdS NRs and the PEDOT:PSS, respectively, which divides the spectrum into short-and long-wavelength regions.…”

Section: Resultsmentioning

confidence: 99%

“…Figure e shows the X-ray diffraction (XRD) patterns of CdS@PEDOT:PSS core–shell NRs, in which the diffraction peaks correspond to hexagonal CdS (JCPDS 41–1049). , The dominant peaks at 26.5 and 47.8° are indexed to the (002) and (103) crystal faces, respectively. In addition, a broad and slight peak centered at 25.5° is ascribed to the PEDOT:PSS shell, which has a semiamorphous structure. , Furthermore, the UV–visible (UV–vis) absorption spectrum from 300 to 800 nm is measured to ensure the light harvesting capacity of the CdS NRs and the PEDOT:PSS layer. As shown in Figure f, light with wavelengths below and above 570 nm is mainly absorbed by the CdS NRs and the PEDOT:PSS, respectively, which divides the spectrum into short- and long-wavelength regions.…”

Section: Resultsmentioning

confidence: 99%

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Self-Powered Wavelength-Dependent Dual-Polarity Response Photodetector Based on CdS@PEDOT:PSS@Au Sandwich-Structured Core–Shell Nanorod Arrays

Zhang,

Zhai,

Wang

2023

ACS Appl. Mater. Interfaces

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Self-powered operation and multifunctionality have significantly oriented the development of photodetectors (PDs), which could be realized through nanoarchitecture construction and energy band structure design. Herein, a self-powered wavelength-dependent dual-polarity response PD based on (CdS@PEDOT:PSS@Au) sandwich-structured core–shell nanorod arrays (NRAs) is proposed. The synthesis approach of this three-layer heterostructure consists of a hydrothermal reaction, spin coating, and thermal evaporation. The n-CdS/p-PEDOT:PSS junction and the PEDOT:PSS/Au Schottky junction at the interfaces provide two photocurrent driving forces in opposite directions, and their contribution to the net photocurrent is controlled by the incident light wavelength due to the different light absorption ranges of the CdS core and the PEDOT:PSS shell. As a result, the polarity of the photocurrent switches from negative to positive as the wavelength increases. In addition, the response speed of negative photocurrents (∼10 ms) is faster than that of positive photocurrents (∼100 ms), which is consistent with the underlying mechanism of the dual-polarity response. Furthermore, color discrimination and imaging capabilities are demonstrated by deploying the PDs as sensing pixels and recognizing green and red patterns. The sandwich-structured core–shell NRA heterojunction system introduces a novel idea for dual-polarity response PDs.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Self-Powered Wavelength-Dependent Dual-Polarity Response Photodetector Based on CdS@PEDOT:PSS@Au Sandwich-Structured Core–Shell Nanorod Arrays

Zhang,

Zhai,

Wang

2023

ACS Appl. Mater. Interfaces

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“…New inks based on composites between PEDOT:PSS and graphene dots have advanced, offering opportunities for simpler and more cost-effective deposition technology. Various approaches have been explored for the growth of PEDOT:PSS/graphene films, including electro-polymerization (where PEDOT is electropolymerized on carbon paper-coated graphene [ 18 ]), spin-coating [ 19 ], and inkjet printing [ 20 ]. However, challenges remain concerning the uniformity and agglomeration of these coatings.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Properties of PEDOT:PSS/Graphene Conductive Layers in Artificial Sweat

Tzaneva,

Aleksandrova,

Mateev

et al. 2023

Sensors

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Electrodes based on PEDOT:PSS are gaining increasing importance as conductive electrodes and functional layers in various sensors and biosensors due to their easy processing and biocompatibility. This study investigates PEDOT:PSS/graphene layers deposited via spray coating on flexible PET substrates. The layers are characterized in terms of their morphology, roughness (via AFM and SEM), and electrochemical properties in artificial sweat using electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The layers exhibit dominant capacitive behavior at low frequencies, with cut-off frequencies determined for thicker layers at 1 kHz. The equivalent circuit used to fit the EIS data reveals a resistance of about three orders of magnitude higher inside the layer compared to the charge transfer resistance at the solid/liquid interface. The capacitance values determined from the CV curves range from 54.3 to 122.0 mF m−2. After 500 CV cycles in a potential window of 1 V (from −0.3 to 0.7 V), capacitance retention for most layers is around 94%, with minimal surface changes being observed in the layers. The results suggest practical applications for PEDOT:PSS/graphene layers, both for high-frequency impedance measurements related to the functioning of individual organs and systems, such as impedance electrocardiography, impedance plethysmography, and respiratory monitoring, and as capacitive electrodes in the low-frequency range, realized as layered PEDOT:PSS/graphene conductive structures for biosignal recording.

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Improving the electrical conductivity and electrochemical properties of PEDOT:PSS thin films by Ca and Mg doping

Yağci

Özdemir

2022

Polym. Bull.

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Graphene effects on the structural, morphological and optical properties of PEDOT:PSS thin films

Cited by 9 publications

References 11 publications

Self-Powered Wavelength-Dependent Dual-Polarity Response Photodetector Based on CdS@PEDOT:PSS@Au Sandwich-Structured Core–Shell Nanorod Arrays

Self-Powered Wavelength-Dependent Dual-Polarity Response Photodetector Based on CdS@PEDOT:PSS@Au Sandwich-Structured Core–Shell Nanorod Arrays

Electrochemical Properties of PEDOT:PSS/Graphene Conductive Layers in Artificial Sweat

Improving the electrical conductivity and electrochemical properties of PEDOT:PSS thin films by Ca and Mg doping

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