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ITO free MoO3/Au/MoO3 structures using Al2O3 as protective barrier between MoO3 and PEDOT:PSS in organic solar cells

Author

Listed:
  • Maniruzzaman, Md.
  • Rahman, Mohammad Arifur
  • Jeong, Kyunghoon
  • Nam, Ho-seok
  • Lee, Jaegab

Abstract

A MoO3/Au/MoO3 structure with a protective barrier Al2O3 was developed to suppress the reactions between MoO3 and the PEDOT:PSS film in organic solar cells (OSCs). Though the maximum optical transmittance of this structure was 66% at 550 nm wavelength, the power conversion efficiency of a MoO3/Au/MoO3/Al2O3/PEDOT:PSS based OSCs was 2.77%, comparable to the 2.89% of an ITO-based OSCs. The introduction of a very thin Al2O3 layer between the MoO3 and the acidic PEDOT:PSS film effectively protected the MoO3 from the acidic and water dispersed PEDOT:PSS film, increasing the Jsc, Voc and FF of the structure above those of the MoO3/Au/MoO3/PEDOT:PSS structure. The Al2O3 (1 nm) introduced to the MoO3/Au/MoO3 structure improved Jsc because it suppressed the reactions between MoO3 and PEDOT:PSS and lowered the work function of the PEDOT:PSS film. The MoO3/Au/MoO3/Al2O3 electrode was shown to be a promising replacement of ITO for use in flexible optoelectronic devices.

Suggested Citation

  • Maniruzzaman, Md. & Rahman, Mohammad Arifur & Jeong, Kyunghoon & Nam, Ho-seok & Lee, Jaegab, 2014. "ITO free MoO3/Au/MoO3 structures using Al2O3 as protective barrier between MoO3 and PEDOT:PSS in organic solar cells," Renewable Energy, Elsevier, vol. 71(C), pages 193-199.
    • Handle: RePEc:eee:renene:v:71:y:2014:i:c:p:193-199
    DOI: 10.1016/j.renene.2014.05.040
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    Keywords

    ITO-free; Multilayer; Al2O3; Organic solar cell;
    All these keywords.

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