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Optical images and typical height vs width profiles for annealed silver precursor lines printed at dot-to-dot spacing of (a) , (b) , and (c) . The ink contains silver acetate and ethylene glycol as cosolvent. Scale bars indicate .
Effect of dot-to-dot spacing on line width and center-to-edge height ratio for inks containing silver acetate and, respectively, (◼, line width; ▲, ratio) and ethylene glycol (◻, line width; △, ratio). The increasing ethylene glycol concentration causes a shift in optimal dot-to-dot spacing, which in turn decreases the line width at the optimal spacing.
(a) Line width printed on glass microscope slides (▲) and on silicon wafer (△) at optimal dot-to-dot spacing for inks with ethylene glycol as a function of ink viscosity. Inset shows the viscosity as a function of silver acetate concentration. (b) Center-to-edge height ratio of lines printed at various dot-to-dot spacing for inks with viscosities of (▲) 9.52 cp, (◼) 13.46 cp, and (●) 15.84 cp.
(a) The fabrication scheme used to make our OTFTs, (b) top view of a typical OTFT fabricated using inkjet printed source and drain electrodes and inkjet printed PQT semiconductor, (c) the drain current as a function of drain voltage at various gate voltages, and (d) the drain current as a function of gate voltage at drain voltage of −60 V. The transistor had an electrode width of , a channel length of , and a channel width of .
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