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Article Dans Une Revue Materials Science and Engineering: B Année : 2016

Electro-synthesis, characterization and photoconducting performance of ITO/polybithiophene–MnO2 composite

Résumé

tManganese dioxide is synthesized by reduction reaction of potassium permanganate with hydrogenperoxide. The as-synthesized -MnO2is characterized by powder X-ray diffraction and infrared spec-troscopy. The MnO2particles are used to prepare composite films containing polybithophene (PBTh) onindium tin oxide (ITO) glass substrates. The composite films ITO/PBTh–MnO2are obtained by electro-polymerization of bithiophene in the presence the -MnO2particles dispersed in the electrolytic solution.The XRD and SEM analyses show that the -MnO2particles of size in the range 100–300 nm are incorpo-rated in the polymer. The films are characterized by cyclic voltammetry impedance spectroscopy, UV–visspectroscopy and scanning electron microscopy. As a result, the electrochemical gap and the opticalgap are shifted by the incorporation of MnO2from 2.15 eV for ITO/PBTh to 1.88 eV for ITO/PBTh–MnO2,while the electrical conductivity decreases from 195.35 S/cm for ITO/PBTh down to 0.047 S/cm forITO/PBTh–MnO2at the highest MnO2investigated. The photo-electrochemical measurements also indi-cate that the ITO/PBTh–MnO2films show a photocurrent that is three times higher than that of ITO/PBThsubstrate to reach 20.6 A cm−2, so that such a composite can be used as a new active material insolar cells.
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Dates et versions

hal-01286829 , version 1 (11-03-2016)

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H. Zouaoui, D. Abdi, A. Bahloul, B. Nessark, E. Briot, et al.. Electro-synthesis, characterization and photoconducting performance of ITO/polybithiophene–MnO2 composite. Materials Science and Engineering: B, 2016, 208, pp.29-38. ⟨10.1016/j.mseb.2016.02.007⟩. ⟨hal-01286829⟩
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