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@ARTICLE{Aeberhard:861505,
author = {Aeberhard, Urs},
title = {{C}hallenges in the {NEGF} {S}imulation of
{Q}uantum‐{W}ell {P}hotovoltaics {P}osed by
{N}on‐{L}ocality and {L}ocalization},
journal = {Physica status solidi / B Basic research B},
volume = {256},
number = {7},
issn = {1521-3951},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2019-01963},
pages = {1800500 -},
year = {2019},
abstract = {In this paper, the implications of non‐locality and
localization for the implementation and performance of
quantum‐opto‐electronic device simulators based on the
non‐equilibrium Green's function formalism are considered.
It is shown that in the case of electron–photon
interaction enabling interband transitions, restriction of
the non‐locality range (the spatial distance over which
the coupling acts) not only leads to an underestimation of
the coupling strength as for intraband electron‐phonon
scattering, but also to an inaccurate spectral shape of the
response functions and to the violation of selection rules
applying to the scattering rates. On the other hand,
localization of electronic states (the restriction of finite
probability density to a small spatial region) induced by
discontinuities and fluctuations in the band profile has a
detrimental impact on the speed of convergence of the
self‐consistent evaluation of Green's functions and
scattering self‐energies, as illustrated by the example of
photocarrier extraction from different quantum well
configurations.},
cin = {IEK-5 / JARA-HPC},
ddc = {530},
cid = {I:(DE-Juel1)IEK-5-20101013 / $I:(DE-82)080012_20140620$},
pnm = {121 - Solar cells of the next generation (POF3-121) /
Ab-initio description of charge carrier dynamics at
defective interfaces in solar cells $(jiek50_20171101)$},
pid = {G:(DE-HGF)POF3-121 / $G:(DE-Juel1)jiek50_20171101$},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000477754800028},
doi = {10.1002/pssb.201800500},
url = {https://juser.fz-juelich.de/record/861505},
}