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@ARTICLE{Steffens:888966,
author = {Steffens, Jonathan and Weit, Swetlana and Rinder, Johannes
and Glatthaar, Raphael and Moller, Soren and Hahn, Giso and
Terheiden, Barbara},
title = {{I}nfluence of the {C}arbon {C}oncentration on ( p )
{P}oly-{S}i{C} x {L}ayer {P}roperties {W}ith {F}ocus on
{P}arasitic {A}bsorption in {F}ront {S}ide {P}oly-{S}i{C} x
/{S}i{O} x {P}assivating {C}ontacts of {S}olar {C}ells},
journal = {IEEE journal of photovoltaics},
volume = {10},
number = {6},
issn = {2156-3403},
address = {New York, NY},
publisher = {IEEE},
reportid = {FZJ-2020-05365},
pages = {1624 - 1631},
year = {2020},
note = {Kein Post-Print verfügbar},
abstract = {Passivating contacts based on polycrystalline silicon
(poly-Si) on an interfacial oxide are limited by parasitic
absorption, which may be reduced by incorporation of foreign
elements in the poly-Si layer. In this study, the influence
of carbon incorporation in the concentration range of
6.9-21.5 $at\%$ on boron-doped polycrystalline silicon
carbide (poly-SiCx) layer properties is investigated and
interpreted in the context of an application as full-area
passivating contact on the front side of a solar cell. For
constant annealing parameters, higher carbon concentrations
reduce the crystallinity of the layers. A high crystallinity
in turn is confirmed to be a key parameter for the
application in a solar cell as it ensures both low
resistivity as well as low parasitic absorption. Low
recombination current densities in the range of 7.2-12.2
fA/cm 2 are determined for all layers on interfacial oxides
on planar surfaces, whereas the differences are rather
related to variations in the boron concentration than to the
carbon concentration or the deposition parameters. A
reduction of the (p) poly-SiCx layer thickness down to 10 nm
would yield a parasitic absorption current density of 1.13
± 0.13 mA/cm 2 . Using this value and the lowest measured
recombination current density, a simple model predicts a
theoretical solar cell efficiency limit of 26.7 ± $0.2\%.$},
cin = {IEK-4},
ddc = {530},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000582595800014},
doi = {10.1109/JPHOTOV.2020.3023506},
url = {https://juser.fz-juelich.de/record/888966},
}