InGaAs tunnel diodes for the calibration of semi-classical and quantum mechanical band-to-band tunneling models

摘要

Promising predictions are made for Ⅲ-Ⅴ tunnel-field-effect transistor (FET), but there is still uncertainty on the parameters used in the band-to-band tunneling models. Therefore, two simulators are calibrated in this paper; the first one uses a semi-classical tunneling model based on Kane's formalism, and the second one is a quantum mechanical simulator implemented with an envelope function formalism. The calibration is done for In_(0.53)Ga_(0.47)As using several p+/intrinsic+ diodes with different intrinsic region thicknesses. The dopant profile is determined by SIMS and capacitance-voltage measurements. Error bars are used based on statistical and systematic uncertainties in the measurement techniques. The obtained parameters are in close agreement with theoretically predicted values and validate the semi-classical and quantum mechanical models. Finally, the models are applied to predict the input characteristics of In_(0.53)Ga_(0.47)As n- and p-lineTFET, with the n-lineTFET showing competitive performance compared to MOSFET.