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@ARTICLE{Tran:185490,
author = {Tran, Duy P. and Macdonald, Thomas J. and Wolfrum, Bernhard
and Stockmann, Regina and Nann, Thomas and Offenhäusser,
Andreas and Thierry, Benjamin},
title = {{P}hotoresponsive properties of ultrathin silicon
nanowires},
journal = {Applied physics letters},
volume = {105},
number = {23},
issn = {1077-3118},
address = {Melville, NY},
publisher = {American Inst. of Physics},
reportid = {FZJ-2014-06917},
pages = {231116},
year = {2014},
abstract = {Functional silicon nanowires (SiNWs) are promising building
blocks in the design of highly sensitive photodetectors and
bio-chemical sensors. We systematically investigate the
photoresponse properties of ultrathin SiNWs (20 nm)
fabricated using a size-reduction method based on e-beam
lithography and tetramethylammonium hydroxide wet-etching.
The high-quality SiNWs were able to detect light from the UV
to the visible range with excellent sensitivity (∼1
pW/array), good time response, and high photoresponsivity
(R ∼ 2.5 × 104 A/W). Improvement of the
ultrathin SiNWs' photoresponse has been observed in
comparison to 40 nm counter-part nanowires. These
properties are attributable to the predominance
surface-effect due to the high surface-to-volume ratio of
ultrathin SiNWs. Long-term measurements at different
temperatures in both the forward and reverse bias directions
demonstrated the stability and reliability of the fabricated
device. By sensitizing the fabricated SiNW arrays with
cadmium telluride quantum dots (QDs), hybrid QD SiNW devices
displayed an improvement in photocurrent response under UV
light, while preserving their performance in the visible
light range. The fast, stable, and high photoresponse of
these hybrid nanostructures is promising towards the
development of optoelectronic and photovoltaic devices},
cin = {PGI-8 / JARA-FIT},
ddc = {530},
cid = {I:(DE-Juel1)PGI-8-20110106 / $I:(DE-82)080009_20140620$},
pnm = {423 - Sensorics and bioinspired systems (POF2-423)},
pid = {G:(DE-HGF)POF2-423},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000346266000016},
doi = {10.1063/1.4904089},
url = {https://juser.fz-juelich.de/record/185490},
}