ITO free MoO3/Au/MoO3 structures using Al2O3 as protective barrier between MoO3 and PEDOT:PSS in organic solar cells |
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| Affiliation: | 1. School of Advanced Materials Engineering, Kookmin University, Seoul 136-702, South Korea;2. Department of Chemistry, University of Dhaka, Dhaka 1000, Bangladesh;1. Stichting Monitoring Zonnestroom (SMZ), Utrecht, The Netherlands;2. Utrecht University, CopernicusInstitute, Utrecht, The Netherlands;3. New-Energy-Works (NEW), Utrecht, The Netherlands;4. Rencom, Ouderkerk a/d Amstel, The Netherlands;5. Holland Solar, Utrecht, The Netherlands;6. Organisatie voor Duurzame Energie (ODE), Utrecht, The Netherlands;1. Cascadia Coast Research Ltd., 26 Bastion Square, Third Floor – Burnes House, Victoria, BC V8W1H9, Canada;2. University of Victoria, Department of Mechanical Engineering, PO Box 3075 STN CSC, Victoria, BC V8W 3P6, Canada;1. Electrical and Computer Engineering Department, Mississippi State University, Mississippi State, MS 39762, USA;2. Department of Electrical Engineering, K.N. Toosi University of Technology, Tehran, Iran;3. Battery Management Department, Qualcomm, San Diego, CA, USA;1. EDMANS Group, Department of Mechanical Engineering, University of La Rioja, Logroño, Spain;2. Division of Biosciences, University of Helsinki, 00014 Helsinki, Finland;3. Electrical Engineering Department, EUITI-UPM, Ronda de Valencia 3, 28012 Madrid, Spain;4. Instituto de Energía Solar, Ciudad Universitaria s/n, Madrid, Spain;5. Renewable Energy Division (Energy Department), CIEMAT Avda. Complutense 22, 28040 Madrid, Spain |
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| 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. |
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| Keywords: | ITO-free Multilayer Organic solar cell |
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