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@ARTICLE{Brinker:605489,
author = {Brinker, Manuel and Huber, Patrick},
title = {{A} {M}ott-{S}chottky analysis of mesoporous silicon in
aqueous electrolyte solution by electrochemical impedance
spectroscopy},
journal = {Electrochimica acta},
volume = {483},
issn = {0013-4686},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {PUBDB-2024-01466, arXiv:2312.04252},
pages = {144038},
year = {2024},
note = {5 pages, 3 figures},
abstract = {Nanoporosity in silicon leads to completely new
functionalities of this mainstream semiconductor.In recent
years, it has been shown that filling the pores with aqueous
electrolytes in addition opensa particularly wide field for
modifying and achieving active control of these
functionalities, e.g.,for electrochemo-mechanical actuation
and tunable photonics, or for the design of on-chip
superca-pacitors. However, a mechanistic understanding of
these new features has been hampered by thelack of a
detailed characterization of the electrochemical behavior of
mesoporous silicon in aqueouselectrolytes. Here, the
capacitive, potential-controlled charging of the electrical
double layer in amesoporous silicon electrode (pore diameter
7 nm) imbibed with perchloric acid solution is studiedby
electrochemical impedance spectroscopy. Thorough
measurements with detailed explanationsof the observed
phenomena lead to a comprehensive understanding of the
capacitive properties ofporous silicon. An analysis based on
the Mott-Schottky equation allows general conclusions to
bedrawn about the state of the band structure within the
pore walls. Essential parameters such as theflat band
potential, the doping density and the width of the space
charge region can be determined.A comparison with bulk
silicon shows that the flat band potential in particular is
significantly al-tered by the introduction of nanopores, as
it shifts from 1.4 ± 0.1 V to 1.9 ± 0.2 V. Overall,
thisstudy provides a unique insight into the electrochemical
processes, especially the electrical doublelayer charging,
of nanoporous semiconductor electrodes.},
cin = {CIMMS},
ddc = {540},
cid = {I:(DE-H253)CIMMS-20211022},
pnm = {632 - Materials – Quantum, Complex and Functional
Materials (POF4-632) / EHAWEDRY - Energy harvesting via
wetting/drying cycles with nanoporous electrodes (964524)},
pid = {G:(DE-HGF)POF4-632 / G:(EU-Grant)964524},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)16},
eprint = {2312.04252},
howpublished = {arXiv:2312.04252},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:2312.04252;\%\%$},
UT = {WOS:001203564000001},
doi = {10.1016/j.electacta.2024.144038},
url = {https://bib-pubdb1.desy.de/record/605489},
}