51 citations · 163 across the 33 of their papers we have counts for
34 papers
The use of the output states generated by the broadcasting of entanglement in quantum teleportation
Iulia Ghiu, Catalina Cirneci, George Alexandru Nemnes
In this article, we find a theorem that gives a relation between the maximal fidelity of teleportation and the concurrence of the inseparable state used as a quantum channel in…
Electron transporting bilayers for perovskite solar cells: spray coating deposition of c-TiO2/m-SnO2-quantum dots
Anca G. Mirea, Ioana D. Vlaicu, Sarah Derbali +12
Herein we present a comparative study among different mesoporous electron transporter layers (ETLs), namely nanometric m-TiO2, m-SnO2 and m-SnO2 quantum dots (QDs), deposited by sp…
Impact of interface defects on the band alignment and performance of TiO/MAPI/CuO perovskite solar cells
Nicolae Filipoiu, Marina Cuzminschi, Mihaela Cosinschi +9
Optimizing the interfaces in perovskite solar cells (PSCs) is essential for enhancing their performance, improving their stability, and making them commercially viable for large-sc…
OH ions can reduce the iodide migration in MAPI
R. E. Brophy, M. Kateb, I. Ghitiu +6
One of the main degradation mechanisms of methylammonium lead iodine (MAPI), which is an important material for perovskite based solar cells, is the migration of iodide ions. It is…
Effect of pressure on the dynamics of iodine defects in MAPI: An atomistic simulation
Rachel Elizabeth Brophy, Movaffaq Kateb, Kristinn Torfason +4
The diffusion of iodine defects has been considered the most important degradation mechanism of methylammonium lead iodine (MAPI) in solar cells. The present study demonstrates the…
Mapping confinement potentials and charge densities of interacting quantum systems using conditional generative adversarial networks
Calin-Andrei Pantis-Simut, Amanda Teodora Preda, Lucian Ion +2
Accurate and efficient tools for calculating the ground state properties of interacting quantum systems are essential in the design of nanoelectronic devices. The exact diagonaliza…
Optoelectronic and stability properties of quasi-2D alkylammonium based perovskites
N. Filipoiu, Anca G. Mirea, Sarah Derbali +6
Electronic and stability properties of quasi-2D alkylammonium perovskites are investigated using density functional theory (DFT) calculations and validated experimentally on select…
Capacitive and inductive effects in perovskite solar cells: the different roles of ionic current and ionic charge accumulation
Nicolae Filipoiu, Amanda Teodora Preda, Dragos Victor Anghel +8
Dynamic hysteresis effects have been long known to occur in the J-V characteristics of perovskite solar cells (PSCs), with the ionic migration being identified as the primary facto…
Structure and electrical behavior of silicon nanowires prepared by MACE process
R. Plugaru, E. Fakhri, C. Romanitan +9
We report on the structure and electrical characteristics of silicon nanowire arrays prepared by metal assisted chemical etching (MACE) method, investigated by cross-sectional scan…
Investigation of bi-particle states in gate-array-controlled quantum-dot systems aided by machine learning techniques
G. A. Nemnes, T. L. Mitran, A. T. Preda +3
Quantum computing architectures require an accurate and efficient description in terms of many-electron states. Recent implementations include quantum dot arrays, where the ground…
A ballistic transport model for an artificial neuron
George Alexandru Nemnes, Daniela Dragoman
We introduce a model for an artificial neuron which is based on ballistic transport in a multi-terminal device. Unlike standard configurations, the proposed design embeds the synap…
Graphene bandgap induced by ferroelectric Pca2 HfO substrate: a first-principles study
George Alexandru Nemnes, Daniela Dragoman, Mircea Dragoman
The electronic properties of graphene on top of ferroelectric HfO substrates in orthorhombic phase with space group Pca2 are investigated using density functional theory ca…
Reconfigurable quantum logic gates using Rashba controlled spin polarized currents
George Alexandru Nemnes, Daniela Dragoman
A reconfigurable logic gate is proposed in a two-dimensional double quantum wire system with a coupling window enabled by a Rashba field. Manipulating the spin states of incoming e…
Gap prediction in hybrid graphene - hexagonal boron nitride nanoflakes using artificial neural networks
G. A. Nemnes, T. L. Mitran, A. Manolescu
The electronic properties graphene nanoflakes (GNFs) with embedded hexagonal boron nitride (hBN) domains are investigated by combined {\it ab initio} density functional theory calc…
Electric and thermoelectric properties of graphene bilayers with extrinsic impurities under applied electric field
G. A. Namnes, T. L. Mitran, A. Manolescu +1
In contrast to monolayer graphene, in bilayer graphene (BLG) one can induce a tunable bandgap by applying an external electric field, which makes it suitable for field effect appli…
The hysteresis-free behavior of perovskite solar cells from the perspective of the measurement conditions
George Alexandru Nemnes, Cristina Besleaga, Andrei Gabriel Tomulescu +5
We investigate in how far the hysteresis-free behavior of perovskite solar cells can be reproduced using particular pre-conditioning and measurement conditions. As there are curren…
Electric field effect in boron and nitrogen doped graphene bilayers
G. A. Nemnes, T. L. Mitran, A. Manolescu +1
Unlike single layer graphene, in the case of -stacked bilayer graphene (BLG) one can induce a non-zero energy gap by breaking the inversion symmetry between the two layers usin…
How measurement protocols influence the dynamic J-V characteristics of perovskite solar cells: theory and experiment
G. A. Nemnes, Cristina Besleaga, A. G. Tomulescu +4
The dynamic effects observed in the J-V measurements represent one important hallmark in the behavior of the perovskite solar cells. Proper measurement protocols (MPs) should be em…
Reversal of thermoelectric current in tubular nanowires
Sigurdur Ingi Erlingsson, Andrei Manolescu, George Alexandru Nemnes +2
We calculate the charge current generated by a temperature bias between the two ends of a tubular nanowire. We show that in the presence of a transversal magnetic field the current…
Normal and inverted hysteresis in perovskite solar cells
George Alexandru Nemnes, Cristina Besleaga, Viorica Stancu +6
Hysteretic effects are investigated in perovskite solar cells in the standard FTO/TiO/CHNHPbICl/spiro-OMeTAD/Au configuration. We report normal (NH) and inv…
Electronic and thermal conduction properties of halogenated porous graphene nanoribbons
George Alexandru Nemnes, Camelia Visan, Andrei Manolescu
In the framework of density functional theory (DFT) calculations we investigate the electronic and thermal properties of porous graphene (PG) structures passivated with halogen ato…
Molecular dynamics of halogenated graphene - hexagonal boron nitride nanoribbons
George Alexandru Nemnes, Camelia Visan, Dragos Victor Anghel +1
The hybrid graphene - hexagonal boron nitride (G-hBN) systems offer new routes in the design of nanoscale electronic devices. Using {\it ab initio} density functional theory calcul…
Dynamic electrical behavior of halide perovskite based solar cells
George Alexandru Nemnes, Cristina Besleaga, Andrei Gabriel Tomulescu +4
A dynamic electrical model is introduced to investigate the hysteretic effects in the I-V characteristics of perovskite based solar cells. By making a simple ansatz for the polariz…
The role of the chemical potential in the BCS theory
Dragos-Victor Anghel, George Alexandru Nemnes
We study the effect of the chemical potential on the results of the BCS theory of superconductivity. We assume that the pairing interaction is manifested between electrons of singl…