Effect of polymerization sequence on the electrochemical properties of polypyrrole / poly(3-methylthiophene) bilayers

Ayoub, S.M.; Dias, Bruna Lomba; Mascaro, Lúcia H.; Micaroni, Liliana; Gazotti, W.A.

doi:10.1515/epoly.2003.3.1.752

Cited by 2 publications

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“…Therefore, the morphological structure of the PPy-p͑TPTC3-PO 3 H 2 ͒ bilayer is dominated by the morphology of the deposited PPy films. Similar observations were made by other authors, reporting that the bilayer was composed of PPy as inner layer and poly͑3-methylthiophene͒, PMeT, 13 or poly͑3-octylthiophene͒ 37 as outer layers.…”

Section: Resultssupporting

confidence: 91%

“…It has been reported that bilayers composed of PPy as the inner layer and pMeT as the outer layer, present a similar picture. 43,13 When a reduction pulse is applied from OCP to −0.6 V ͑curve e in Fig. 7͒ in 0.1 M tris/HCl buffer, the intensity of the absorbance at 800-nm band decreases.…”

Section: Journal Of the Electrochemical Society 152 ͑11͒ E345-e350 ͑2...mentioning

confidence: 99%

“…One of them is to use layered conducting polymers by depositing a primary layer first and then to modify its surface by a second layer of conducting polymer containing appropriate functionality. Successive electrochemical deposition of polypyrrole ͑PPy͒ as inner film and polythiophene as outer film has been investigated, such as PPy and poly͑3-methylthiophene͒, 12,13 PPy and poly͑3-octylthiophene͒ 14 and polypyrrole/sulfosalicylic acid as inner film and poly͑N-methylpyrrole/poly͑styrene sulfonate͒ ͑PSS͒ as outer film. 15,16 Electrochemical analysis of those bilayers showed that redox processes occurring in the inner layer limit the charge transfer to the outer layer.…”

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confidence: 99%

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Electropolymerization of Bilayer with Phosphonic Acid Tethers for Immobilization of Biomolecules

Hartung¹,

Kowalik²,

Kranz³

et al. 2005

J. Electrochem. Soc.

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Bilayer consisting of polypyrrole, PPy, as the inner and poly(2,5-dithienyl-( N -3-phosphorylpropyl)pyrrole, p(TPTC3-normalPO3H2) as the outer layers was electropolymerized in layer-by-layer steps. Due to the presence of phosphonic acid functionality tethered to the backbone of outer polymer, the system is capable of binding organic and inorganic bases and offers an easy and conven- ient access to sensor devices. The ion transport through the polypyrrole film depends on its thickness. The thin layer of pTPTC3-PnormalO3normalH2 does not hinder the redox and ion-transport characteristics of the PPy layer.

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Section: Resultssupporting

confidence: 91%

Section: Journal Of the Electrochemical Society 152 ͑11͒ E345-e350 ͑2...mentioning

confidence: 99%

mentioning

confidence: 99%

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Electropolymerization of Bilayer with Phosphonic Acid Tethers for Immobilization of Biomolecules

Hartung¹,

Kowalik²,

Kranz³

et al. 2005

J. Electrochem. Soc.

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Low Bandgap Organic Semiconductors for Photovoltaic Applications

Afaq,

Pathak,

Aamir

et al. 2024

Int. J. Nanosci.

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Photovoltaic is one of the best low-cost alternative energy sources. In this paper, organic semiconductors were explored as light harvesters due to their extraordinary properties, but initially, the scientific community focused on synthesizing the large bandgap organic semiconductors, which were unsuitable for photovoltaic applications. Wide bandgap organic semiconductors can capture light only from the UV–Vis region of the solar spectrum, thus showing solar cells’ power conversion efficiency (PCE) of less than 5%. By reducing the bandgap, organic semiconductors can show good compatibility with the air mass (AM) of 1.5 solar spectrums. So, the attention came toward synthesizing low bandgap semiconductors, which led to the enhancement of PCE from 5% to 17%. This review summarizes the overall development of the last 15 years in the field of organic photovoltaic semiconductors. The significant parameters in organic semiconductors are their bandgap, the position of the highest occupied molecular orbital (HOMO), and the lowest unoccupied molecular orbital (LUMO) that can easily be tuned chemically by molecular designing. One of the issues in organic photovoltaic solar devices is the need for absorbers with a narrow bandgap to maximize power conversion efficiencies to a great extent. Moreover, several factors, such as conjugation length, bond length alteration, intermolecular interaction, donor–acceptor charge transfer, planarity, and physical states, are responsible for tuning the bandgap. This review also classifies low bandgap semiconductors based on the core skeleton with their bandgaps, structures, and power conversion efficiencies.

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Effect of polymerization sequence on the electrochemical properties of polypyrrole / poly(3-methylthiophene) bilayers

Cited by 2 publications

References 0 publications

Electropolymerization of Bilayer with Phosphonic Acid Tethers for Immobilization of Biomolecules

Electropolymerization of Bilayer with Phosphonic Acid Tethers for Immobilization of Biomolecules

Low Bandgap Organic Semiconductors for Photovoltaic Applications

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