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5. Palladium Nanowires Assembly by Dielectrophoresis Investigated as Hydrogen Sensors.

Author

La Ferrara, V., Alfano, B., Massera, E., and Di Francia, G.

Abstract

Fabrication of hydrogen sensors based on array of palladium nanowires onto silicon substrate with interdigitated electrodes is reported. Two series of devices, where Pd-sensing elements are assembled by dielectrophoresis, are fabricated and electrically characterized under 4% hydrogen at room temperature. Their electrical responses are analyzed and compared to investigate the effect of nanowire thickness and surface morphology on sensitivity and response time. We have found thinner nanowires are more sensitive and their response time is shorter than thicker ones. [ABSTRACT FROM PUBLISHER]

Published
2008
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6. Wet etching of different thickness c-Si wafers for light trapping improvement

Author

M. Della Noce, Laura Lancellotti, P. Delli Veneri, A. De Maria, Eugenia Bobeico, V. La Ferrara, Delli Veneri, P., Lancellotti, L., Della Noce, M., Bobeico, E., De Maria, A., and La Ferrara, V.

Subjects
Light trapping, Materials science, Silicon, business.industry, Scanning electron microscope, chemistry.chemical_element, Substrate (electronics), Solar cell efficiency, chemistry, Etching (microfabrication), Wet etching, Smoothing, Optoelectronics, Wafer, Dry etching, Reactive-ion etching, business
Abstract

Surface texturing plays an important role to reduce light reflection and improve light confinement within silicon substrate thus resulting in solar cell efficiency enhancement. In this paper wet anisotropic texturing and subsequent wet isotropic smoothing of different thickness c-Si wafers are investigated to light trapping improvement. The influence of reagent concentration and etching time of the process smoothing are studied. The reflection properties of textured wafers, before and after smoothing steps, are monitored using UV-VIS spectrophotometer and the surface morphology images are acquired by scanning electron microscope. © 2014 AEIT.

Published
2014
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