Authors: Kim, Minseok; Koo, Jae Bon; Baeg, Kang-Jun; Noh, Yong-Young; Yang, Yong Suk; Jung, Soon-Won; Ju, Byeong-Kwon; You, In-Kyu

Source: Journal of Nanoscience and Nanotechnology, Volume 12, Number 4, April 2012 , pp. 3272-3275(4)

Publisher: American Scientific Publishers

Abstract:

Silver (Ag) metal electrode having 20 μm channel length was printed by reverse offset printing (ROP) using nano-silver paste ink for the source/drain of organic thin-film transistors (OTFT). Specific resistance and surface roughness of printed Ag electrodes with increasing curing temperature were investigated, and surface morphology and grain growth mechanism were systematically verified using a scanning electron microscope (SEM) and atomic force microscope (AFM) in order to obtain an optimized ROP Ag electrode. The Ag electrode was applied to fabricate top-gate/bottom-contact poly(3-hexylthiophene) OTFT devices, which showed reproducible OTFT characteristics such as the field-effect mobility, threshold voltage, and an on/off-current ratio of ∼10⁻³ cm²/Vs, 0.36 V, and ∼10², respectively.

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2012.5639

Publication date: 2012-04-01

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