Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 109, Issue -, Pages 192-198Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2012.10.015
Keywords
In-Zn-Sn-O (IZTO); PEDOT:PSS; LFTS; Flexibility; Flexible organic solar cells
Funding
- New & Renewable Energy of Korea Institute of Energy Technology Evaluation and Planning (KETEP) [2011T100200034]
- Korea government Ministry of Knowledge Economy
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We have investigated the characteristics of transparent and flexible PEDOT:PSS electrodes passivated by thin InZnSnO (IZTO) film for flexible organic solar cells (FOSCs). Using damage-free linear facing target sputtering (LFTS), an IZTO passivation layer was deposited on the gravure printed PEDOT:PSS electrode without causing plasma damage. The thickness of the IZTO passivation layer was found to critically affect electrical and optical properties of the IZTO/PEDOT multilayer because the continuity and morphology of the thin IZTO passivation layer were greatly influenced by thickness. At optimized IZTO passivation thickness of 20 nm, the IZTO/PEDOT:PSS multilayer electrode exhibited decreased sheet resistance of 353.6 Omega/sq and optical transmittance of 83.09% without flexibility degradation. The FOSC with an optimized IZTO/PEDOT:PSS electrode showed better performances than the FOSC with PEDOT:PSS electrodes due to the effect of a stable En) passivation layer. This indicates that IZTO passivation on the PEDOT:PSS electrode using a LETS is one of the key solutions for improving the properties and stability of flexible PEDOT:PSS electrodes for high performance FOSCs. (C) 2012 Elsevier B.V. All rights reserved.
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