Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Nemnes, George Alexandru"'
Autor:
Filipoiu, Nicolae, Cuzminschi, Marina, Pantis-Simut, Calin-Andrei, Torfason, Kristinn, Brophy, Rachel Elizabeth, Manolescu, Andrei, Patru, Roxana E., Besleaga, Cristina, Stan, George E., Pintilie, Ioana, Nemnes, George Alexandru
Optimizing the interfaces in perovskite solar cells (PSCs) is essential for enhancing their performance, improving their stability, and making them commercially viable for large-scale deployment in solar energy harvesting applications. Point defects,
Externí odkaz:
http://arxiv.org/abs/2406.19594
Autor:
Brophy, Rachel Elizabeth, Kateb, Movaffaq, Torfason, Kristinn, Nemnes, George Alexandru, Svavarsson, Halldor Gudfinnur, Pintilie, Ioana, Manolescu, Andrei
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 importance of the pressure inside this material on the dynamics of io
Externí odkaz:
http://arxiv.org/abs/2302.05696
Autor:
Pantis-Simut, Calin-Andrei, Preda, Amanda Teodora, Ion, Lucian, Manolescu, Andrei, Nemnes, George Alexandru
Accurate and efficient tools for calculating the ground state properties of interacting quantum systems are essential in the design of nanoelectronic devices. The exact diagonalization method fully accounts for the Coulomb interaction beyond mean fie
Externí odkaz:
http://arxiv.org/abs/2301.02122
Autor:
Filipoiu, Nicolae, Preda, Amanda Teodora, Anghel, Dragos Victor, Patru, Roxana, Brophy, Rachel Elizabeth, Kateb, Movaffaq, Besleaga, Cristina, Tomulescu, Andrei Gabriel, Pintilie, Ioana, Manolescu, Andrei, Nemnes, George Alexandru
Publikováno v:
Phys. Rev. Applied 18, 064087 (2022)
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 factor. The hysteretic effects impacted early studies by the uncertainty in
Externí odkaz:
http://arxiv.org/abs/2208.10199
Akademický článek
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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 synaptic weights into the active region, thus significantly reducing the co
Externí odkaz:
http://arxiv.org/abs/1912.09267
The electronic properties of graphene on top of ferroelectric HfO$_2$ substrates in orthorhombic phase with space group Pca2$_1$ are investigated using density functional theory calculations. The space group Pca2$_1$ was recently identified as one of
Externí odkaz:
http://arxiv.org/abs/1903.09826
Publikováno v:
Physica E 111, 13 (2019)
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 electrons several quantum logic gates (OR, AND, XOR, CNOT) can be imple
Externí odkaz:
http://arxiv.org/abs/1812.06346
Autor:
Nemnes, George Alexandru, Besleaga, Cristina, Tomulescu, Andrei Gabriel, Leonat, Lucia Nicoleta, Stancu, Viorica, Florea, Mihaela, Manolescu, Andrei, Pintilie, Ioana
Publikováno v:
Journal of Materials Chemistry C 2019
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 currently more and more reports of perovskite solar cells without J-V hyster
Externí odkaz:
http://arxiv.org/abs/1812.03855
Autor:
Erlingsson, Sigurdur Ingi, Manolescu, Andrei, Nemnes, George Alexandru, Bardarson, Jens H., Sanchez, David
Publikováno v:
Phys. Rev. Lett. 119, 036804 (2017)
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 can change sign, i.e., electrons can either flow from the hot to the
Externí odkaz:
http://arxiv.org/abs/1705.01569