Fernando Avila-Herrera

Organic Solar Cells Toward the Fabrication Under Air Environment

In this work, we analyze the performance parameters of the inverted organic solar cells (OSC) partially fabricated under an air environment, comparing them with those of similar solar cells manufactured totally under a nitrogen environment. Both solar cells use PTB7 and PC70BM as the active blend layer. The electrical parameters were extracted from the current density-voltage characteristic (J-V) under light and dark conditions. At the beginning, the OSCs partially fabricated under an air environment showed a similar performance as those manufactured under an N2 environment. After 120 h, the power conversion efficiency of the OSCs partially fabricated under an air environment decreased 32% with respect to its initial value. The degradation process under the ISOS-D1 protocols was also analyzed.

From double to triple gate: Modeling junctionless nanowire transistors

This paper presents a continuous, physically and charge-based new model for triple gate junctionless nanowire transistors (3G JNT). The presented model was evolved from a previous one designed for double gate junctionless transistors (2G JNT). The capacitance coupling and the internal potential changing from 2G to 3G JNTs are considered. The model validation is performed through both numerical simulation and experimental measurements for long and short channel devices.

Proposal of compact analytical modeling for trigate junctionless nanowire transistors

A compact analytical model for junctionless nanowire transistors is developed taking into account the fin height and including its capacitance. This model is based on a previous one for double-gate transistors just considering the dependence of the fin height and the short channel effects. The validation has been performed by 3D simulations for structures of 15 nm and 10 nm of height obtaining a very good agreement between modeled and simulated data.