Real-time ellipsometric characterization of the initial growth stage of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) films by electrospray deposition using N,N-dimethylformamide solvent solution

Ino, Tomohisa; Hiate, Taiga; Fukuda, Tsuguo; Ueno, Keiji; Shirai, Hajime

doi:10.1016/j.jnoncrysol.2012.01.055

Cited by 9 publications

(5 citation statements)

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“…28) This feature is also influenced by the addition of polar solvent materials such as graphene oxide (GO) flakes and dimethyl sulfoxide (DMSO). 29,30) These findings suggest that a polar solvent reduces the fundamental band gap, i.e., enhances the electrical conductivity of PEDOT:PSS, without significantly changing the polymer structure.…”

Section: Resultsmentioning

confidence: 90%

Electrospray-Deposited Poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonate) for Poly(3-hexylthiophene):Phenyl-C₆₁-Butyric Acid Methyl Ester Photovoltaic Cells

Hiate¹,

Ino²,

Ishikawa³

et al. 2012

Jpn. J. Appl. Phys.

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Electrospray-deposited poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) was investigated using several solvent solutions as a hole-transporting layer for spin-coated poly(3-hexylthiophene-2,5-diyl):[6,6]-phenyl-C61 butyric acid methyl ester (P3HT:PCBM) mixture organic thin-film solar cells (OSCs). Among them, the uniform deposition of PEDOT:PSS films was realized using 70% N,N-dimethylformamide solvent solution. The P3HT:PCBM solar cells with electrospray-deposited PEDOT:PSS as a hole transport layer showed a relatively high performance with an open-circuit voltage V oc of 0.47 V, a short-circuit current J sc of 8.9 mA/cm2, a fill factor FF of 0.48, and a power conversion efficiency of 2.0%, which were almost the same as those with a spin-coated PEDOT:PSS layer. These findings imply that the electrospray-deposited PEDOT:PSS is a possible material for use as a hole transport layer for conjugated polymer-based OSCs.

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Section: Resultsmentioning

confidence: 90%

Electrospray-Deposited Poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonate) for Poly(3-hexylthiophene):Phenyl-C₆₁-Butyric Acid Methyl Ester Photovoltaic Cells

Hiate¹,

Ino²,

Ishikawa³

et al. 2012

Jpn. J. Appl. Phys.

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“…However, uniaxial anisotropy has been found in these samples. According to Ino et al [ 31 ], it probably arises from a geometric anisotropy of the polymer chains, due to a preferential molecular orientation during the film growth.…”

Section: Practical Considerations Related To the Determination Of The...mentioning

confidence: 99%

Isotropic and Anisotropic Complex Refractive Index of PEDOT:PSS

2023

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In this work, the complex refractive indexes of seven PEDOT:PSS samples, three with isotropic behavior and four with optical anisotropy, were determined. For the anisotropic samples, the ordinary and extraordinary components of the refractive index were described. The effect of the film thickness, measurement technique and preparation method on the extinction coefficient (k) and refractive index (n) of each sample was also discussed. Important differences (up to 20% in the average n) were found among the samples investigated. In most anisotropic films, the mean value of the extraordinary component was between 7 and 10% higher than that of the ordinary. In the three isotropic films, the average k rose when the film thickness increased. Moreover, the different sets of refractive index data were fitted to three different models: the original Forouhi–Bloomer model, the Liu (2007) model and the revised version of the Forouhi–Bloomer model (2019). In general, Liu’s model gave better results, with small errors in n and k (<7.81 and 4.68%, respectively, in all the cases). However, this model had seven fitting parameters, which led to significantly longer computation time than the other two models. The influence of the differences in the measurement of the complex refractive index on the simulation of the optical properties of PEDOT:PSS multilayers was discussed. The results showed that n must be known precisely to accurately calculate the light absorption in a multilayer, without ignoring the isotropic or anisotropic behavior of the material or the influence of the layer thickness on its optical properties. This study aids in the development of simulation and optimization tools that allow understanding the optical properties of PEDOT:PSS films for their potential applications in organic optoelectronic devices, such as organic solar cells.

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“…The optical properties of PEDOT:PSS films have been extensively investigated also by SE in the Vis-fUV spectral region, for example during its fabrication by electrospray, spin coating and printing techniques [57,58,[69][70][71][72]. The conductivity of PEDOT:PSS depends strongly on its structure and morphology.…”

Section: Pedot:pss For Transparent Electrodesmentioning

confidence: 99%

Polymer Blends and Composites

Logothetidis

2014

Ellipsometry of Functional Organic Surfaces and Films

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The implementation of flexible Organic Electronic (OE) devices in a large variety of consumer applications (generation of electricity, visualization of information, lighting, sensing, etc.) will significantly improve our everyday life. The typical OE device (e.g. a organic photovoltaic cell-OPV) consists of multilayered structures (30-200 nm thick each) fabricated onto rigid (e.g. glass) and/or flexible substrates (as PET, PEN) from transparent and electrically active organic nanolayers. The OE device core is the active or the organic semiconducting (polymer or small molecules) layer, that absorbs photons and generates electric charges, sandwiched between the device electrodes. Finally, the device is encapsulated by barrier layers for the protection of the photoactive layers against degradation and corrosion due to atmospheric gas penetration inside the device.The understanding of the correlation between the polymer blend structure and its optical and electrical properties, and the achievement of the desirable morphology at nanometer scale, is a prerequisite in order to optimize the device performance and stability. Spectroscopic Ellipsometry (SE) from the infrared to the visible and far ultraviolet spectral region has been widely used to provide significant insights on the optical properties, blend morphology, and composition of the polymer blends that are used as active layers in OE devices. In this chapter, we summarize on the latest advances in the implementation of SE from the infrared to the visible and ultraviolet spectral region, for the investigation of the optical and electronic properties, composition profile and structure of polymer nanomaterials that are used as organic semiconductors and transparent electrodes for OE devices, and we discuss the effect of their nanoscale structure on their properties and functionality.

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Real-time ellipsometric characterization of the initial growth stage of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) films by electrospray deposition using N,N-dimethylformamide solvent solution

Cited by 9 publications

References 14 publications

Electrospray-Deposited Poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonate) for Poly(3-hexylthiophene):Phenyl-C₆₁-Butyric Acid Methyl Ester Photovoltaic Cells

Electrospray-Deposited Poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonate) for Poly(3-hexylthiophene):Phenyl-C₆₁-Butyric Acid Methyl Ester Photovoltaic Cells

Isotropic and Anisotropic Complex Refractive Index of PEDOT:PSS

Polymer Blends and Composites

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Real-time ellipsometric characterization of the initial growth stage of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) films by electrospray deposition using N,N-dimethylformamide solvent solution

Cited by 9 publications

References 14 publications

Electrospray-Deposited Poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonate) for Poly(3-hexylthiophene):Phenyl-C61-Butyric Acid Methyl Ester Photovoltaic Cells

Electrospray-Deposited Poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonate) for Poly(3-hexylthiophene):Phenyl-C61-Butyric Acid Methyl Ester Photovoltaic Cells

Isotropic and Anisotropic Complex Refractive Index of PEDOT:PSS

Polymer Blends and Composites

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Product

Resources

About

Electrospray-Deposited Poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonate) for Poly(3-hexylthiophene):Phenyl-C₆₁-Butyric Acid Methyl Ester Photovoltaic Cells

Electrospray-Deposited Poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonate) for Poly(3-hexylthiophene):Phenyl-C₆₁-Butyric Acid Methyl Ester Photovoltaic Cells