Quasi-static capacitancevoltage characteristics of pentacene-based metaloxidesemiconductor structures
Quasi-static capacitancevoltage (QSCV) measurements are performed on modified metaloxidesemiconductor capacitors in order to investigate the capacitance characteristics of the active channel region of organic thin-film transistors (OTFTs). Devices are fabricated on highly doped Si wafer with SiO2 as the gate dielectric and pentacene as the organic semiconductor. Hysteresis is observed in the QSCV characteristics, which is explained with the charge trapping in the organic semiconductor. In addition, we show that surface charges generated by Au penetration into pentacene can cause plateaus in the QSCV curves. A behavioral PSpice model is also presented which allows QSCV simulations of OTFTs to be performed.
quasi-static capacitancevoltage characteristics metaloxidesemiconductor capacitor organic thin-film transistors hysteresis pspice modeling threshold voltage shift