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Journal of Vacuum Science & Technology B, Vol.28, No.4, C5F22-C5F27, 2010
Mobility saturation in tapered edge bottom contact copper phthalocyanine thin film transistors
Copper phthalocyanine (CuPc) thin film transistors were fabricated using a tapered edge bottom contact device geometry, and mobility saturation was observed for devices with CuPc thicknesses of 12 monolayers (MLs) and greater. The mobility saturation is attributed to a significantly decreased contact resistance resulting from a bilayer resist lift-off method, as compared with a single layer resist lift-off method. Threshold voltages are also found to saturate above 12 ML CuPc thicknesses. (C) 2010 American Vacuum Society. [DOI:10.1116/1.3464771]