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@ARTICLE{Donie:844963,
author = {Donie, Yidenekachew J. and Smeets, Michael and Egel, Amos
and Lentz, Florian and Preinfalk, Jan B. and Mertens, Adrian
and Smirnov, Vladimir and Lemmer, Uli and Bittkau, Karsten
and Gomard, Guillaume},
title = {{L}ight trapping in thin film silicon solar cells via phase
separated disordered nanopillars},
journal = {Nanoscale},
volume = {10},
number = {14},
issn = {2040-3372},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2018-02298},
pages = {6651 - 6659},
year = {2018},
abstract = {In this work, we have improved the absorption properties of
thin film solar cells by introducing light trapping
reflectors deposited onto self-assembled nanostructures. The
latter consist of a disordered array of nanopillars and are
fabricated by polymer blend lithography. Their broadband
light scattering properties are exploited to enhance the
photocurrent density of thin film devices, here based on
hydrogenated amorphous silicon active layers. We demonstrate
that these light scattering nanopillars yield a
short-circuit current density increase of $+33\%rel$ with
respect to equivalent solar cells processed on a planar
reflector. Moreover, we experimentally show that they
outperform randomly textured substrates that are commonly
used for achieving efficient light trapping. Complementary
optical simulations are conducted on an accurate 3D model to
analyze the superior light harvesting properties of the
nanopillar array and to derive general design rules. Our
approach allows one to easily tune the morphology of the
self-assembled nanostructures, is up-scalable and operated
at room temperature, and is applicable to other photovoltaic
technologies.},
cin = {IEK-5},
ddc = {600},
cid = {I:(DE-Juel1)IEK-5-20101013},
pnm = {121 - Solar cells of the next generation (POF3-121)},
pid = {G:(DE-HGF)POF3-121},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29582026},
UT = {WOS:000429530400045},
doi = {10.1039/C8NR00455B},
url = {https://juser.fz-juelich.de/record/844963},
}