Zobrazeno 1 - 10
of 158
pro vyhledávání: '"Aeberhard, U."'
Autor:
Aeberhard, U.
Publikováno v:
Phys. Rev. B 89, 115303 (2014)
The generation of photocurrents due to coupling of electrons to both classical and quantized electromagnetic fields in thin semiconductor films is described within the framework of the nonequilibrium Green's function formalism. For the coherent coupl
Externí odkaz:
http://arxiv.org/abs/1308.3841
Autor:
Aeberhard, U.
The propagation of light in layered semiconductor media is described theoretically and simulated numerically within the framework of the non-equilibrium Green's function formalism as used for state-of-the-art nanodevice simulations, treating the non-
Externí odkaz:
http://arxiv.org/abs/1308.3159
Autor:
Aeberhard, U.
Publikováno v:
Optical and Quantum Electronics 44, 133 (2012)
We introduce a quantum dot orbital tight-binding non-equilibrium Green's function approach for the simulation of novel solar cell devices where both absorption and conduction are mediated by quantum dot states. By the use of basis states localized on
Externí odkaz:
http://arxiv.org/abs/1206.2674
Autor:
Aeberhard, U.
Publikováno v:
Journal of Computational Electronics 10, 394 (2011)
This article reviews the application of the non-equilibrium Green's function formalism to the simulation of novel photovoltaic devices utilizing quantum confinement effects in low dimensional absorber structures. It covers well-known aspects of the f
Externí odkaz:
http://arxiv.org/abs/1206.2671
Autor:
Aeberhard, U.
Publikováno v:
Physical Review B 86, 115317 (2012)
Excitonic contributions to absorption and photocurrent generation in semiconductor nanostructures are described theoretically and simulated numerically using steady-state non-equilibrium Green's function theory. In a first approach, the coherent inte
Externí odkaz:
http://arxiv.org/abs/1206.1682
Quantum-kinetic theory of photocurrent generation via direct and phonon-mediated optical transitions
Autor:
Aeberhard, U.
Publikováno v:
Physical Review B, 84, 035454 (2011)
A quantum-kinetic theory of direct and phonon mediated indirect optical transitions is developed within the framework of the non-equilibrium Green's function formalism. After validation against the standard Fermi-Golden-Rule approach in the bulk case
Externí odkaz:
http://arxiv.org/abs/1012.5462
Autor:
Aeberhard, U.
Publikováno v:
Nanoscale Research Letters, 6, 242 (2011)
Si-SiOx superlattices are among the candidates that have been proposed as high band gap absorber material in all-Si tandem solar cell devices. Due to the large potential barriers for photoexited charge carriers, transport in these devices is restrict
Externí odkaz:
http://arxiv.org/abs/1009.3643
Autor:
Aeberhard, U., Rau, U.
Absorption and emission in inorganic bipolar solar cells based on low dimensional structures exhibiting the effects of quantum confinement is investigated in the framework of a comprehensive microscopic theory of the optical and electronic degrees of
Externí odkaz:
http://arxiv.org/abs/0912.1450
Autor:
Aeberhard, U.
Publikováno v:
Solar Energy Materials and Solar Cells, 94, 1897 (2010)
The use of low-dimensional structures such as quantum wells, wires or dots in the absorbing regions of solar cells strongly affects the spectral response of the latter, the spectral properties being drastically modified by quantum confinement effects
Externí odkaz:
http://arxiv.org/abs/0912.0592
Autor:
Aeberhard, U., Morf, R. H.
Publikováno v:
Physical Review B, 77, 125343 (2008)
We present a microscopic theory of bipolar quantum well structures in the photovoltaic regime, based on the non-equilibrium Green's function formalism for a multi band tight binding Hamiltonian. The quantum kinetic equations for the single particle G
Externí odkaz:
http://arxiv.org/abs/0709.4131