Heterojunction devices consisting of conducting polymers

Miyauchi, Shinnosuke; Goto, Yutaka; Tsubata, Ichiro; Sorimachi, Yoshio

doi:10.1016/0379-6779(91)91553-m

Cited by 25 publications

(9 citation statements)

References 4 publications

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“…The impedance and voltammetric results show that once the coverage rate is complete, the TiO 2-polypyrrole junction behaves like a conductor in the dark, although the underlying Miyauchi et al [29], from reference [28], and from the estimation of the energy of the conduction band for TiO 2 -NTA (Fig. 10b), the electron transfer process between the oxide and the polymer is schemed in Fig.…”

Section: Eis Investigations In the Dark And Under Uv Of Junctions Promentioning

confidence: 99%

Photo-assisted electrodeposition of an electrochemically active polypyrrole layer on anatase type titanium dioxide nanotube arrays

Ngaboyamahina

Cachet

Pailleret

et al. 2014

Electrochimica Acta

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Section: Eis Investigations In the Dark And Under Uv Of Junctions Promentioning

confidence: 99%

Photo-assisted electrodeposition of an electrochemically active polypyrrole layer on anatase type titanium dioxide nanotube arrays

Ngaboyamahina

Cachet

Pailleret

et al. 2014

Electrochimica Acta

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“…The number of articles on bilayers formed by conducting polymers only is, however, limited [17, [22][23][24][25][26][27][28][29][30][31][32][33][34]. These works demonstrate the presence of rectifying effects and charge trapping effects both in electrolyte solutions and for bilayers put between two metal electrodes.…”

Section: Introductionmentioning

confidence: 96%

Estimation of charge trapping in bilayers of coducting polymers composed of polypyrrole and poly(N‐methylpyrrole)

Maksymiuk

1996

Electroanalysis

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Charge trapping effects were studied in bilayers of conducting polymers composed of poly(N-methylpyrrole) (PMPy) and polypyrrole (PPy), by comparing redox charges of the polymer [Q(ox/red)] obtained by integration of cyclic voltammetric and chronoamperometric curves for single films and bilayers with variable thickness of both components. Charge trapping factors, TF, for PMPy(inner layer)/ PPy(outer layer) bilayers were determined using the definition: TF = 1 -Q(ox/red)~~~/Q(ox/red)ppr. where Q(ox/red)F& is redox charge of PPy in the bilayer, Q(ox/red)pp, relates to the charge for a single PPy film of the same thickness as that in the bilayer. Since the formal potential of PMPy is higher than that of PPy, the outer PPy film cannot be entirely reduced due to low conductivity of PMPy at negative potentials. The estimated charge trapping factor is independent of the outer layer thickness, it depends, however on the thickness of the inner film. For the reverse sequence of polymers, PPy/PMPy, charge trapping was not observed. Modification of the outer PPy layer by immobilized poly(4-styrenesulfonate) anions changes the response of the bilayer due to low permeability of the cation-exchanging outer polymer to anions. Therefore perchlorate anions compensating charge of PMPy film were found to be entrapped in the polymer matrix under conditions of cyclic voltammetry.

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“…The pioneer conducting polymer 'polyacetylene' was doped with molecular donors (Lithium, Sodium, Potassium etc) to make it n-type and molecular acceptor (Bromine, Iodine & AsF 5 ) to make it p-type and the junction was made by mechanical pressing. Similarly electrochemically doped polypyrrole (anion doped) and derivatives of polythiophenes (cation doped) were also used as n and p type semiconductors for fabrication of p-n heterojunction [6]. Several other similar attempts are known in the literature [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 98%