by Esther Punzón-Quijorna, Sarah Kajari-Shröder, Fernando Agulló-Rueda, Miguel Manso Silván, Raul José Martín-Palma, Pilar Herrero Fernández, Vicente Torres-Costa and Aurelio Climent-Font
Abstract:
The formation of micropatterns combining nanostructured (porous) Si (NPSi) and bulk Si is induced by a sequential process of selective high energy ion irradiation and anodic etching. In this work, we investigate the microstructural origin of the increase of Si resistivity on irradiated areas, which is responsible for the inhibition of NPSi formation upon anodization. The increase of Si resistivity after irradiation at variable fluence has been evidenced from current voltage (I-V) characteristics. Microstructural aspects of the Si interfaces irradiated with 1.5–20 MeV Si ions have been revealed by elastic backscattering experiments in channeling configuration, Raman spectroscopy and high resolution transmission electron microscopy. It is concluded that inhibition of NPSi formation is induced at fluences that do not imply amorphization. In fact, the analysis of electrochemical capacitance-voltage measurements suggests that, at fluences well below the threshold for lattice disruption, the concentration of holes suffers from a drastic decrease at depths that match the location of maximum damage yield of the implanted Si ions. These results suggest that the mechanism responsible of formation of hierarchical Si structures is the local B dopant deactivation in the irradiated areas.
Reference:
Esther Punzón-Quijorna, Sarah Kajari-Shröder, Fernando Agulló-Rueda, Miguel Manso Silván, Raul José Martín-Palma, Pilar Herrero Fernández, Vicente Torres-Costa and Aurelio Climent-Font, “Study of the formation mechanism of hierarchical silicon structures produced by sequential ion beam irradiation and anodic etching”, Vacuum, vol. 138, pp. 238–243.
Bibtex Entry:
@article{punzon-quijorna_study_2017,
title = {Study of the formation mechanism of hierarchical silicon structures produced by sequential ion beam irradiation and anodic etching},
volume = {138},
issn = {0042-207X},
url = {http://www.sciencedirect.com/science/article/pii/S0042207X16306753},
doi = {10.1016/j.vacuum.2016.10.011},
abstract = {The formation of micropatterns combining nanostructured (porous) Si (NPSi) and bulk Si is induced by a sequential process of selective high energy ion irradiation and anodic etching. In this work, we investigate the microstructural origin of the increase of Si resistivity on irradiated areas, which is responsible for the inhibition of NPSi formation upon anodization. The increase of Si resistivity after irradiation at variable fluence has been evidenced from current voltage (I-V) characteristics. Microstructural aspects of the Si interfaces irradiated with 1.5–20 MeV Si ions have been revealed by elastic backscattering experiments in channeling configuration, Raman spectroscopy and high resolution transmission electron microscopy. It is concluded that inhibition of NPSi formation is induced at fluences that do not imply amorphization. In fact, the analysis of electrochemical capacitance-voltage measurements suggests that, at fluences well below the threshold for lattice disruption, the concentration of holes suffers from a drastic decrease at depths that match the location of maximum damage yield of the implanted Si ions. These results suggest that the mechanism responsible of formation of hierarchical Si structures is the local B dopant deactivation in the irradiated areas.},
urldate = {2019-10-01},
journal = {Vacuum},
author = {Punzón-Quijorna, Esther and Kajari-Shröder, Sarah and Agulló-Rueda, Fernando and Manso Silván, Miguel and Martín-Palma, Raul José and Herrero Fernández, Pilar and Torres-Costa, Vicente and Climent-Font, Aurelio},
month = apr,
year = {2017},
keywords = {Anodization, Charge carrier deactivation, Hierarchical structures, High energy ion irradiation, Nanostructured silicon},
pages = {238--243},
file = {ScienceDirect Full Text PDF:E:\Usuarios\Administrator\Zotero\storage\D2T8Z7QI\Punzón-Quijorna et al. - 2017 - Study of the formation mechanism of hierarchical s.pdf:application/pdf;ScienceDirect Snapshot:E:\Usuarios\Administrator\Zotero\storage\H9JF97WB\S0042207X16306753.html:text/html},
}