Journal
APPLIED PHYSICS LETTERS
Volume 92, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2937845
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- Ministry of Education, Science & Technology (MoST), Republic of Korea [2E20780] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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By inserting a very thin layer of Ag between two layers of amorphous indium zinc tin oxide (IZTO), we fabricated a highly flexible, low resistance, and highly transparent IZTO-Ag-IZTO multilayer electrode on a polyethylene terephthalate (PET) substrate. Due to surface plasmon resonance (SPR) effects and the ductility of the Ag layer, the IZTO-Ag-IZTO electrode exhibited a low sheet resistance of 4.99 Omega/sq. and a high transparency of 86% as well as superior flexibility despite the very thin thickness of the IZTO layer (30 nm). It was found that the transition of the Ag layer from distinct islands to a continuous film occurred at a critical thickness (similar to 14 nm). Continuity of the Ag film is very important for SPR in IZTO-Ag-IZTO electrode. The current density-voltage-luminance characteristics of flexible organic light emitting diodes (OLEDs) fabricated on IZTO-Ag-IZTO/PET were better than those of flexible OLEDs fabricated on an ITO/PET substrate due to the low sheet resistance and high work function of the IZTO. (C) 2008 American Institute of Physics.
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