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The detection of toxic chemicals/biomolecules is of paramount importance for medical applications, environmental monitoring, food and pharmaceutical industries. Among the sensors available, FET based chemical/biosensors promise highly-sensitive, label-free detection for point-of-care applications. Further, compatibility with CMOS technology reduces costs and allows functional integration. Unfortunately,...
Understanding the effects of device parameters on carrier transport is essential for the design of high efficiency aSi/c-Si heterojunction solar cells. It is well known that the dark current-voltage (I-V) characteristics are correlated to fundamental PV parameters that dictate cell performance, and therefore an analysis of dark I-V may be a useful diagnostic tool to monitor changes in the device parameters...
Electronic sensing of biomolecules is an area of immerse interest for semiconductor industry. Here we utilize the remarkable sensitivity of double-gated field-effect transistors above the fundamental Nernst limit (59mV/pH) in pH sensing to improve the sensitivity of biomolecule detection in electrolyte screening limited conditions. Our simulation results and compact models are broadly supported by...
A numerical simulation tool for Schottky-Barrier Carbon Nanotube Field-Effect Transistors (SB-CNFETs), based on self-consistent solution of Poisson and continuity equations was developed. Method of moments is used for solving Poisson equation. Continuity equations are solved using current boundary conditions. Boundary currents are those currents tunneling through Schottky barriers at the contacts,...
Recently, there has been a lot of interest in flexible and high efficiency solar cells due to cost advantages of roll to roll printing. Traditionally, ITO (Indium Tin Oxide) or ZnO (Zinc Oxide) electrodes have been used as top contacts for solar cells because of their reasonable transparency and moderately low sheet resistance. However, these electrodes are not flexible and would undergo breakdown...
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