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http://dx.doi.org/10.7736/KSPE.2014.31.11.993

Fabrication of Ag Grid Patterned PET Substrates by Thermal Roll-Imprinting for Flexible Organic Solar Cells  

Cho, Jung Min (School of Global Convergence Studies, Hanbat University)
Jo, Jeongdai (Department of Printed Electronics, Korea Institute of Machinery and Materials)
Kim, Taeil (School of Global Convergence Studies, Hanbat University)
Kim, Dong Soo (School of Global Convergence Studies, Hanbat University)
Publication Information
Journal of the Korean Society for Precision Engineering / v.31, no.11, 2014 , pp. 993-998 More about this Journal
Abstract
Silver (Ag) grid patterned PET substrates were manufactured by thermal roll-imprinting methods. We coated highly conductive layer (HCL) as a supply electrode on the Ag grid patterned PET in the three kinds of conditions. One was no-HCL without conductive PEDOT:PSS on the Ag grid patterned PET substrate, another was thin-HCL coated with ~50 nm thickness of conductive PEDOT:PSS on the Ag grid PET, and the other was thick-HCL coated with ~95 nm thickness of conductive PEDOT:PSS. These three HCLs in order showed 73.8%, 71.9%, and 64.7% each in transmittance, while indicating $3.84{\Omega}/{\Box}$, $3.29{\Omega}/{\Box}$, and $2.65{\Omega}/{\Box}$ each in sheet resistance. Fabrication of organic solar cells (OSCs) with HCL Ag grid patterned PET substrates showed high power conversion efficiency (PCE) on the thin-HCL device. The thick-HCL device decreased efficiency due to low open circuit voltage ($V_{OC}$). And the Ag grid pattern device without HCL had the lowest energy efficiency caused by quite low short current density ($J_{SC}$).
Keywords
Thermal Roll-Imprinting; Ag Grid PET Film; Flexible Organic Solar Cells;
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