Alinezhad Amin, Khatibi Mahdi, Ashrafizadeh Seyed Nezameddin
Research Lab for Advanced Separation Processes, Department of Chemical Engineering, Iran University of Science and Technology, NarmakTehran, 16846-13114, Iran.
Sci Rep. 2024 Aug 8;14(1):18409. doi: 10.1038/s41598-024-69335-1.
The PNP nanotransistor, consisting of emitter, base, and collector regions, exhibits distinct behavior based on surface charge densities and various electrolyte concentrations. In this study, we investigated the impact of surface charge density on ion transport behavior within PNP nanotransistors at different electrolyte concentrations and applied voltages. We employed a finite-element method to obtain steady-state solutions for the Poisson-Nernst-Planck and Navier-Stokes equations. The ions form a depletion region, influencing the ionic current, and we analyze the influence of surface charge density on the depth of this depletion region. Our findings demonstrate that an increase in surface charge density results in a deeper depletion zone, leading to a reduction in ionic current. However, at very low electrolyte concentrations, an optimal surface charge density causes the ion current to reach its lowest value, subsequently increasing with further increments in surface charge density. As such, at and , the ionic current increases by 25% when the surface charge density rises from 5 to 20 , whereas at , the ionic current decreases by 65% with the same increase in surface charge density. This study provides valuable insights into the behavior of PNP nanotransistors and their potential applications in nanoelectronic devices.
由发射极、基极和集电极区域组成的PNP纳米晶体管，根据表面电荷密度和各种电解质浓度表现出不同的行为。在本研究中，我们研究了在不同电解质浓度和施加电压下，表面电荷密度对PNP纳米晶体管内离子传输行为的影响。我们采用有限元方法来获得泊松-能斯特-普朗克方程和纳维-斯托克斯方程的稳态解。离子形成一个耗尽区，影响离子电流，并且我们分析了表面电荷密度对该耗尽区深度的影响。我们的研究结果表明，表面电荷密度的增加会导致耗尽区更深，从而导致离子电流降低。然而，在非常低的电解质浓度下，最佳表面电荷密度会使离子电流达到其最低值，随后随着表面电荷密度的进一步增加而增加。因此，在[具体浓度1]和[具体浓度2]时，当表面电荷密度从5增加到20[单位]时，离子电流增加25%，而在[具体浓度3]时，随着表面电荷密度相同的增加，离子电流降低65%。本研究为PNP纳米晶体管的行为及其在纳米电子器件中的潜在应用提供了有价值的见解。
