Effects of Layer Thickness and Annealing of PEDOT:PSS Layers in Organic Photodetectors

Friedel, Bettina; Keivanidis, Panagiotis E.; Brenner, Thomas; Abrusci, Agnese; McNeill, Christopher R.; Friend, Richard H.; Greenham, Neil C.

doi:10.1021/ma901182u

Cited by 273 publications

(220 citation statements)

References 41 publications

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“…The bands at 1200, 1095, and 1034 cm −1 are ascribed to stretching modes of the alkylenedioxy group . Vibrations below 600 cm −1 , the S=O vibration near 1200 cm −1 , and the O-S-O signal at 1034 cm −1 are identical to those for the sulfonic acid group of the PSS chain (Friedel et al, 2009). The following results have definitely proved the effective reduction of GO and the presence of stable PEDOT:PSS layers in the 3D architecture of the composite.…”

Section: Fabrication Of Electrode and Chemical Reductionmentioning

confidence: 64%

Liquid Crystalline Graphene Oxide/PEDOT:PSS Self-Assembled 3D Architecture for Binder-Free Supercapacitor Electrodes

et al. 2014

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Binder-free self-assembled 3D architecture electrodes have been fabricated by a novel convenient method. Liquid crystalline graphene oxide was used as precursor to interact with poly(3,4-ethylene-dioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) in dispersion in order to form a conductive polymer entrapped, self-assembled layer-by-layer structure. This advanced network containing PEDOT:PSS enabled us to ascribe the superior electrochemical properties of particular graphene sheets. This layer-by-layer self-assembled 3D architecture of best performing composite (reduced graphene oxide-PEDOT:PSS 25) showed excellent electrochemical performance of 434 F g −1 through chemical treatment.To highlight these advances, we further explored the practicality of the as-prepared electrode by varying the composite material content. An asymmetric supercapacitor device using aqueous electrolyte was also studied of this same composite. The resulting performance from this set up included a specific capacitance of 132 F g −1 . Above all, we observed an increase in specific capacitance (19%) with increase in cycle life emphasizing the excellent stability of this device.

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Section: Fabrication Of Electrode and Chemical Reductionmentioning

confidence: 64%

Liquid Crystalline Graphene Oxide/PEDOT:PSS Self-Assembled 3D Architecture for Binder-Free Supercapacitor Electrodes

et al. 2014

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“…35 Among various conducting polymers, thin film Poly(3,4-ethylenedioxythiophene) Polystyrene sulfonate (PEDOT: PSS) is known to exhibit superior electronic conductivity. 36 Also, * Electrochemical Society Active Member. z E-mail: wonchangchoi@kist.re.kr a uniform layer of PEDOT:PSS can be easily fabricated by employing a simple wet-coating method.…”

mentioning

confidence: 99%

Surface Modification of Over-Lithiated Layered Oxides with PEDOT:PSS Conducting Polymer in Lithium-Ion Batteries

Lee

Choi

2015

J. Electrochem. Soc.

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Over-lithiated layered oxide (OLO) materials were coated with a PEDOT:PSS conducting polymer via a simple wet-coating method. The prepared samples were observed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The electrochemical properties of the samples were determined by galvanostatic testing and electrochemical impedance spectroscopy (EIS). PEDOT:PSS coated cathode materials showed better rate capability and cyclability between 2.0 V and 4.6 V. X-ray photoelectron spectroscopy (XPS) data imply that the improved electrochemical performance of coated OLO is due to the suppression of the formation and growth of the solid electrolyte interface. 1-7 Among the many candidates, over-lithiated layered oxide (OLO), reported by the Thackeray group in 2005, exhibits a higher capacity (>200 mAh/g) and can reduce the use of expensive cobalt. Therefore, OLO is receiving attention as a cathode material for lithium-ion batteries (LIBs). 8,9 However, OLO experiences an inevitable oxygen loss and, subsequently, an irreversible capacity during the initial charge and discharge process. Additionally, the layered structure of OLO transforms into the spinel phase on cycling. The Li 2 MnO 3 phase in OLO materials exhibits a relatively low electronic conductivity owing to the insulating characteristics of the Li 2 MnO 3 component. 8,9 Referring to the reports by the Thackeray group, OLO material properties such as particle size, morphology control, compositional control by cationic substitution, and surface modification of parent OLO materials have been investigated to improve electrochemical properties. [10][11][12][13][14][15][16] Among the various researches published, investigations of surface modification mostly aim to decrease the initial irreversible capacity at initial cycles and suppress the side reaction between the cathode and electrolyte. Most materials for surface modification can be categorized into three groups: inorganic oxides, carbonbased materials, and polymer-based materials. The inorganic materials, which include AlF 3 , AlPO 4 , CoPO 4 , TiO 2 , V 2 O 5 , Al 2 O 3 , MnO 2 , ZnO, ZrO, MgO, Sm 2 O 3 , Li-Mn-PO 4 , and Li-Ni-PO 4 , are known to decrease the irreversible capacity and improve the electrochemical performances of OLO materials owing to the enforcement of stability on the surface in the high-voltage region. 17-31The carbon materials, including graphene-based materials, are employed to improve the electronic conductivity of OLO cathode materials.19,32-34 Also, surface modification by conducting polymers, such as polypyrrole, has been recently reported to provide improved electronic conductivity as well as a thin protective layer on OLO cathode materials. 35 Among various conducting polymers, thin film Poly(3,4-ethylenedioxythiophene) Polystyrene sulfonate (PEDOT: PSS) is known to exhibit superior electronic conductivity.36 Also, * Electrochemical Society Active Member. z E-mail: wonchangchoi@kist.r...

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“…Besides, the heating of PEDOT films to 200˚C (473 K) revealed an improvement of the crystalline order, which makes easier the transport of carriers inside the grains. The simultaneous loss of water makes the hydrophilic PSS shell to shrink, which facilitates the tunneling of carriers between the grains [1]. Moreover, as the film is heated for longer periods, apart from the decrease of the intergrain distance mentioned before, an increment in the number of interparticle connections is observed, leading to an increase of the conductivity [9].…”

Section: Resultsmentioning

confidence: 93%

“…The insulating hydroscopic PSS surrounding the conductive grains can swell or shrink considerably depending on humidity [1].…”

Section: Resultsmentioning

confidence: 99%

“…PEDOT mixed with polystyrene sulphonate (PSS) forms a processible colloidal solution in water consisting of a random coil entanglement of hydrophilic insulating PSS chains with attached hydrophobic conductive PEDOT oligomers, forming conductive grains 30 -50 nm in diameter. These grains consist of a PEDOT-rich core surrounded by a PSS-rich shell [1]. Adhesion between the PEDOT:PSS grains is attained by hydrogen bonds among HSO 3 groups of the PSS rich shell [2].…”

Section: Introductionmentioning

confidence: 99%

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Differentiation of the Aging Process of PEDOT:PSS Films under Inert Helium and Ambient Atmosphere for Two Different Rates of Thermal Treatment

Sakkopoulos¹,

Vitoratos²

2014

OJOPM

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Effects of Layer Thickness and Annealing of PEDOT:PSS Layers in Organic Photodetectors

Cited by 273 publications

References 41 publications

Liquid Crystalline Graphene Oxide/PEDOT:PSS Self-Assembled 3D Architecture for Binder-Free Supercapacitor Electrodes

Liquid Crystalline Graphene Oxide/PEDOT:PSS Self-Assembled 3D Architecture for Binder-Free Supercapacitor Electrodes

Surface Modification of Over-Lithiated Layered Oxides with PEDOT:PSS Conducting Polymer in Lithium-Ion Batteries

Differentiation of the Aging Process of PEDOT:PSS Films under Inert Helium and Ambient Atmosphere for Two Different Rates of Thermal Treatment

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