Dan Popescu

Dan Popescu
Technische Universität München | TUM · Institute of Nanoelectronics

About

17
Publications
1,867
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119
Citations
Citations since 2016
5 Research Items
107 Citations
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201620172018201920202021202205101520

Publications

Publications (17)
Article
In this paper, we use circuit-level simulations to investigate the synchronization dynamics of spin torque oscillators (STOs) and demonstrate a pattern recognition scheme based on STO dynamics. We perform a sensitivity analysis in order to determine the robustness of the different STO coupling methods, considering parameter variations, such as radi...
Article
In this paper, we present a modeling framework suited for the theoretical study of electrolyte-gated organic thin-film transistors. Employing a novel, fully self-consistent, coupled Poisson-Boltzmann/drift-diffusion simulator, we analyze the response of biosensors for varying bias conditions and ion concentrations in the electrolyte. Our model cons...
Article
In this paper, we have investigated the electron transport and frequency response of the state-of-the-art single-InAs nanowire (NW) FETs using a full-band Monte Carlo simulator. InAs transistors using a single NW as the channel reveal excellent properties such as high current densities, high transconductance, and superior mobility when compared wit...
Article
Full-text available
In this work we fabricate and characterize field-effect transistors based on the solution-processable semiconducting polymer poly(3-hexylthiophene) (P3HT). Applying two independent gate potentials to the electrolyte-gated organic field-effect transistor (EGOFET), by using a conventional SiO2 layer as the back-gate dielectric and the electrolyte-gat...
Conference Paper
Simulations based on kinetic Monte Carlo (kMC) methods provide a powerful and versatile tool to gain a deep understanding of nanoscale processes in organic bulk-heterojunction (BHJ) solar cells and to guide their optimization. We developed a simulation algorithm to model a state-of-the-art solar cell device comprised of a polymer: fullerene active...
Article
In this paper, we have investigated the transport in InAs nanowire-based wrap gate field-effect transistors and their high-frequency performance. State-of-the-art InAs devices reveal excellent dc performance in terms of transconductance, subthreshold slope, and saturation behavior. Only, very recently high-frequency measurements have been performed...
Conference Paper
Numerical simulations based on kinetic Monte Carlo (kMC) techniques provide a powerful and versatile tool to gain a deep understanding of nanoscale processes in bulk organic heterojunction (BHJ) solar cells and to guide their optimization. Low-bandgap polymer donor materials count as constituents for novel cells with improved efficiency, mainly bec...
Article
In this paper, we have investigated the leakage current versus voltage characteristic of high- $k$ thin film capacitors over a large temperature range. Fabricated samples, consisting of a 10-nm thin ${rm SrTiO}_{3}$ (STO) layer as a dielectric material and ${rm SrRuO}_{3}$ as electrodes, have been examined. Electrical measurements performed at diff...
Conference Paper
Organic polymer solar cells have attracted increasing attention over the last decade. Substantial efforts have been made in order to improve the performance of these low cost, solution processed photovoltaic devices, resulting in efficiencies as high as 5% compared to merely 1% in the early 2000s. Beside the planar heterojunction - bilayer structur...
Article
In this paper, we investigate the dynamic response of two different bulk heterojunction organic photodetectors over a large illumination and frequency range. To our knowledge, there is no similar study that includes the nW/cm2 regime. Photocurrent transient measurements reveal that the interlayer at the hole-extracting electrode is critical for the...
Article
Important advances in the development of magnetic manipulation devices have been recorded over the last few years and promising experimental results have been presented. In this article we first perform a detailed analysis on one of most widely used magnetic actuators, namely a planar microcoil. Key parameters that affect the performance of the act...
Conference Paper
Full-text available
This paper describes a feasibility study of a fully organic, low cost, frequency doubler for harmonic RFID applications. The proposed structure is formed by two antennas (RX and TX) printed on paper and an organic Shottky diode able to double the frequency of the received signal. To the author knowledge this contribution proofs for the first time t...

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