ITO free MoO3/Au/MoO3 structures using Al2O3 as protective barrier between MoO3 and PEDOT:PSS in organic solar cells
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/Mo...
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Veröffentlicht in: | Renewable energy 2014-11, Vol.71, p.193-199 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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.
•We optimized the MoO3 (30 nm)/Au (12 nm)/MoO3 (30 nm) anode shows the best transparency.•The introduction of Al2O3 film suppress the reaction between MoO3 and PEDOT:PSS.•The strong dipole moment of Al2O3 lower the work function of the PEDOT:PSS.•An OSCs with Al2O3 shows power conversion efficiency of 2.77%. |
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ISSN: | 0960-1481 1879-0682 |
DOI: | 10.1016/j.renene.2014.05.040 |