Photoelectron studies of electrochemical diffusion of conducting polymer/transparent conductive metal oxide film interfaces

Takemura, Susumu; Kato, Hitoshi

doi:10.1016/s0169-4332(98)00753-3

Cited by 13 publications

(5 citation statements)

References 18 publications

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“…In the pure PTh sample, about 45% fraction of thiophene contain the oxidized sulfur. The third peak (at 167.57 eV) is associated with the formation of positively charged sulfur (S δ+ ) [28]. This positive charge is consistent with the formation and transport of polarons and bipolarons in the conductive grafted polythiophene chains.…”

Section: Xrd and Xps Characterizationsupporting

confidence: 57%

“…5b) can also be deconvoluted into three peaks as well as that of the polythiophene film, while the higher binding energy (163.69, 164.89 and 168.28 eV) is observed. This result indicates the strong interaction between polythiophene and titania through electron transfer from polythiophene to titania, or the formation of bonding between sulfur and oxygen [28]. While the PTh3/TNT and PTh5/TNT composites showed a similar pattern of their composition, the PTh5/TNT composite showed a higher ratio of S/Ti and also a higher level of the positively charged sulfur.…”

Section: Xrd and Xps Characterizationmentioning

confidence: 92%

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Visible-induced photocatalytic reactivity of polymer–sensitized titania nanotube films

Liang

2009

Applied Catalysis B: Environmental

200

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In this study, polythiophene-TiO 2 nanotube films (PTh/TNT) were successfully prepared by a two-step electrochemical process of anodizaton and electropolymerization, in which a highly-ordered TiO 2 nanotube (TNT) film was anodized at a low-voltage with post calcination first and then the prepared TNT film was deposited with a polythiophene layer by electropolymerization in the BFEE electrolyte. The morphology and structures of PTh/TNT composites were examined by FESEM, EDX, XRD, and XPS methods. XPS spectra of PTh/TNT composites indicate the strong interaction between S sites of polymer backbone and TiO 2 nanotubes, in which electron transfer from polythiophene to titania takes place. UV-vis DRS analysis shows that these composites have a strong photoresponse in the visible region at 500 nm. The prepared PTh/TNT films revealed significant activity for 2,3-DCP degradation under visible light irradiation and also sunlight irradiation, in which the PTh3/TNT film achieved the best performance. On the other hand, this study also confirmed that the sidechains of polythiophene could influence its photocatalytic activity significantly in an order from high to low as poly3-methylthiophene ≈ polythiophene > polythiophenecarboxylic acid > poly3-hexylthiophene. The results may provide useful information to further develop This is the Pre-Published Version.2 some effective polymer-semiconductor catalysts for pollutant degradation under sunlight irradiation for water and wastewater treatment.

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Section: Xrd and Xps Characterizationsupporting

confidence: 57%

Section: Xrd and Xps Characterizationmentioning

confidence: 92%

Visible-induced photocatalytic reactivity of polymer–sensitized titania nanotube films

Liang

2009

Applied Catalysis B: Environmental

200

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“…Because of this process in polymers, the In concentration in the organic layer can be enhanced as compared to small molecule-based OLEDs. This mechanisms of ITO etching in the presence of polymers were confirmed using XPS depth profiling as well as Rutherford back scattering (RBS) on ITO|PEDOT:PSS (poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)) and other ITO|polymer interfaces. ,, Additional investigations on other interfaces like SnO 2 |polymer interfaces show that reduced ITO and SnO 2 interfaces may convert into pure metal ions or oxides, which will diffuse through the entire organic . The content of In in the organic layers is found to be nearly 0.1 at.…”

Section: Internal Degradation Mechanismsmentioning

confidence: 75%

“…197,221,365 Additional investigations on other interfaces like SnO 2 |polymer interfaces show that reduced ITO and SnO 2 interfaces may convert into pure metal ions or oxides, which will diffuse through the entire organic. 366 The content of In in the organic layers is found to be nearly 0.1 at. % (1:1000 In:C).…”

Section: Diffusion and Driftmentioning

confidence: 98%

Degradation Mechanisms and Reactions in Organic Light-Emitting Devices

et al. 2015

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“…Figure 5A shows S 2p peaks for unmodified P3HT thin film: S 2p 3/2 (163.4 eV) and S 2p 1/2 (164.2 eV) and is in agreement with the binding energy of S for P3HT. 22,28 The deconvolution of XPS spectra for P3HT−CdS sample shows the peaks corresponding to S 2p binding energies for CdS (161.8 and 163.2 eV) 29 and P3HT (163.8 and 164.8 eV) samples ( Figure 5B). The shifting of S 2P peaks toward higher binding energy (163.8 and 164.8 eV) than that of observed for unmodified P3HT further corroborate the formation of heterostructured P3HT−CdS.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Photocatalytic Activity and Charge Carrier Dynamics of Hetero-Structured Organic–Inorganic Nano-Photocatalysts

Nanda

Swain

Satpati

et al. 2015

ACS Appl. Mater. Interfaces

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P3HT-coupled CdS heterostructured nanophotocatalysts have been synthesized by an inexpensive and scalable chemical bath deposition approach followed by drop casting. The presence of amorphous regions corresponding to P3HT in addition to the lattice fringes [(002) and (101)] corresponding to hexagonal CdS in the HRTEM image confirm the coupling of P3HT onto CdS. The shift of π* (C═C) and σ* (C-C) peaks toward lower energy losses and prominent presence of σ* (C-H) in the case of P3HT-CdS observed in electron energy loss spectrum implies the formation of heterostructured P3HT-CdS. It was further corroborated by the shifting of S 2p peaks toward higher binding energy (163.8 and 164.8 eV) in the XPS spectrum of P3HT-CdS. The current density recorded under illumination for the 0.2 wt % P3HT-CdS photoelectrode is 3 times higher than that of unmodified CdS and other loading concentration of P3HT coupled CdS photoelectrodes. The solar hydrogen generation studies show drastic enhancement in the hydrogen generation rate i.e. 4108 μmol h(-1)g(-1) in the case of 0.2 wt % P3HT-CdS. The improvement in the photocatalytic activity of 0.2 wt % P3HT-CdS photocatalyst is ascribed to improved charge separation lead by the unison of shorter lifetime (τ1=0.25 ns) of excitons, higher degree of band bending, and increased donor density as revealed by transient photoluminescence studies and Mott-Schottky analysis.

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Photoelectron studies of electrochemical diffusion of conducting polymer/transparent conductive metal oxide film interfaces

Cited by 13 publications

References 18 publications

Visible-induced photocatalytic reactivity of polymer–sensitized titania nanotube films

Visible-induced photocatalytic reactivity of polymer–sensitized titania nanotube films

Degradation Mechanisms and Reactions in Organic Light-Emitting Devices

Enhanced Photocatalytic Activity and Charge Carrier Dynamics of Hetero-Structured Organic–Inorganic Nano-Photocatalysts

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