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(a) Optical microscopic image of ink-jet printed silver nanoparticle electrode prior to ablation. (b) Schematics of the fabricated OTFTs by the combined use of ink-jet printing and laser ablation. (c) Confocal laser scanning microscopic three-dimensional images showing the channel region crosscut produced by nanosecond laser. (d) Corresponding two-dimensional profiles of the channel region.
SEM images of (a) nanoparticle film dried at and (b) sintered at . SEM images of single shot ablation crater of (c) nanoparticle film dried at and (d) sintered at . The incident energy and the corresponding peak fluence calculated from the beam waist of are indicated in (c) and (d), respectively.
Atomic force microscopy (AFM) cross-sectional profiles of the craters ablated on the silver nanoparticle film dried at as a function of laser energy. The corresponding AFM topographical images are also shown, and the incident energy and the corresponding peak fluence calculated from the beam waist of are indicated.
Output characteristics of the OTFTs with channel lengths of (a) 10, (b) 20, and (c) . Analysis of contact resistance by transmission line method (TLM) is also shown in (e). Channel width normalized by total resistance is plotted as a function of channel lengths varying from at each gate voltage.
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