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Influence of zinc oxide morphology in hybrid solar cells of poly(3-octylthiophene)

Maia, Guilherme A. R. ; Larsson, Letícia F. G. ; Viomar, Aline ; Matos, Larissa A. C. ; Antunes, Sandra R. M. ; Maia, Elaine C. R. ; Oliveira, Marilei F. ; Cunha, Maico T. ; Rodrigues, Paulo R. P.

Journal of materials science. Materials in electronics, 2016-08, Vol.27 (8), p.8271-8278 [Periódico revisado por pares]

New York: Springer US

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  • Título:
    Influence of zinc oxide morphology in hybrid solar cells of poly(3-octylthiophene)
  • Autor: Maia, Guilherme A. R. ; Larsson, Letícia F. G. ; Viomar, Aline ; Matos, Larissa A. C. ; Antunes, Sandra R. M. ; Maia, Elaine C. R. ; Oliveira, Marilei F. ; Cunha, Maico T. ; Rodrigues, Paulo R. P.
  • Assuntos: Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Electrochemical impedance spectroscopy ; Electron transport ; Materials Science ; Morphology ; Optical and Electronic Materials ; Photovoltaic cells ; Scanning electron microscopy ; Semiconductors ; Solar cells ; Zinc oxide
  • É parte de: Journal of materials science. Materials in electronics, 2016-08, Vol.27 (8), p.8271-8278
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Hybrid solar cells of semiconductor oxides and conductive polymers have been broadly studied. Poly(3-octylthiophene) (P3OT), is an organic polymer formed by conjugated structures with conductive properties, photoluminescence, a relatively high charge mobility and stability. Zinc oxide (ZnO) has been used as an electron acceptor in this cell type because it offers great electron transport properties, simple manufacturing techniques, non-toxicity, variation and morphologic control. Different ZnO morphologies allow distinct properties in terms of electronic transport in solar cell interfaces. The objective of this paper was to evaluate whether ZnO with its different morphologies can improve the anchorage of P3OT and influence the conductive properties of hybrid solar cells of ZnO/P3OT. ZnO particles were synthetized by co-precipitation with Zn(NO 3 ) 2 ·6H 2 O in concentrations of 0.05, 0.10 and 0.15 mol L −1 . The morphology was evaluated by scanning electron microscopy (SEM), and the suspension was evaluated by thermogravimetric analysis and differential scanning calorimetry and X-ray diffraction. Cells containing the working electrode (ZnO/P3OT) were evaluated by open circuit potential (V oc ) and electrochemical impedance spectroscopy (EIS). The SEM images showed three morphologies: spherical ZnO (ZnOE), hexagonal ZnO (ZnOH) and ZnO without defined morphology (ZnOM) due to the variation of the precursor salt concentration. Cells with different morphologies presented medium values of V oc  = −0.438 ± 0.027 V. The EIS indicated that ZnOM/P3OT cells have lower values of charge transfer resistance and higher values of capacitance at intermediate frequencies. ZnOM/P3OT solar cells presented the best results in relation to the electron transfer processes.
  • Editor: New York: Springer US
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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