Development Of Silicon And Silicon Carbide Nanostructures For Photonic Applications

In this study, the structural, optical, and electrical properties of silicon and silicon carbide nanostructures are developed for photonic applications. Visible and ultraviolet (UV) photodetectors are fabricated based on optimized porous silicon (PS) and porous silicon carbide (PSC) nanostructures....

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Main Author:	Naderi, Nima
Format:	Thesis
Language:	English
Published:	2013
Subjects:	QC1 Physics (General)
Online Access:	http://eprints.usm.my/45163/1/Nima%20Naderi24.pdf
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spelling	my-usm-ep.451632019-08-02T07:52:34Z Development Of Silicon And Silicon Carbide Nanostructures For Photonic Applications 2013-07 Naderi, Nima QC1 Physics (General) In this study, the structural, optical, and electrical properties of silicon and silicon carbide nanostructures are developed for photonic applications. Visible and ultraviolet (UV) photodetectors are fabricated based on optimized porous silicon (PS) and porous silicon carbide (PSC) nanostructures. In the first category of this work, the high-porosity and uniform PS samples are generated using an innovative combination of electroless and pulsed photoelectrochemical etching techniques. The electroless chemical etching is optimized by applying the delay time of 2 min prior to the electrochemical process to obtain the highest porosity (83%) and uniformity and hence enhanced photoluminescence (PL) intensity. Next, thermal carbonization of freshly-prepared PS samples is carried out to stabilize their optical and electrical characteristics. In the second category, the high-porosity and uniform PSC samples are synthesized through optimization of etching current density. The optimized sample (with J = 20 mA/cm2) shows the highest porosity (76%), highest surface roughness (137 nm), the most intense PL peak, and the highest stability compare to the other PSC samples. In the third category, high-porosity and uniform porous-shaped SiC thin films are grown based on TC-PS substrates using RF magnetron sputtering. The post annealing process at 1200 °C improves uniformity, grain size (1380 nm), surface roughness (610 nm), PL intensity (237.3 a.u.) and Raman red-shift (24 cm–1). Photodetectors are subsequently fabricated by depositing Schottky contacts onto all porous samples. The results show that the optimized nanostructures of silicon and silicon carbide with high porosity and uniformity are suitable materials for visible and UV photodetection. 2013-07 Thesis http://eprints.usm.my/45163/ http://eprints.usm.my/45163/1/Nima%20Naderi24.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Sains Fizik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QC1 Physics (General)
spellingShingle	QC1 Physics (General) Naderi, Nima Development Of Silicon And Silicon Carbide Nanostructures For Photonic Applications
description	In this study, the structural, optical, and electrical properties of silicon and silicon carbide nanostructures are developed for photonic applications. Visible and ultraviolet (UV) photodetectors are fabricated based on optimized porous silicon (PS) and porous silicon carbide (PSC) nanostructures. In the first category of this work, the high-porosity and uniform PS samples are generated using an innovative combination of electroless and pulsed photoelectrochemical etching techniques. The electroless chemical etching is optimized by applying the delay time of 2 min prior to the electrochemical process to obtain the highest porosity (83%) and uniformity and hence enhanced photoluminescence (PL) intensity. Next, thermal carbonization of freshly-prepared PS samples is carried out to stabilize their optical and electrical characteristics. In the second category, the high-porosity and uniform PSC samples are synthesized through optimization of etching current density. The optimized sample (with J = 20 mA/cm2) shows the highest porosity (76%), highest surface roughness (137 nm), the most intense PL peak, and the highest stability compare to the other PSC samples. In the third category, high-porosity and uniform porous-shaped SiC thin films are grown based on TC-PS substrates using RF magnetron sputtering. The post annealing process at 1200 °C improves uniformity, grain size (1380 nm), surface roughness (610 nm), PL intensity (237.3 a.u.) and Raman red-shift (24 cm–1). Photodetectors are subsequently fabricated by depositing Schottky contacts onto all porous samples. The results show that the optimized nanostructures of silicon and silicon carbide with high porosity and uniformity are suitable materials for visible and UV photodetection.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Naderi, Nima
author_facet	Naderi, Nima
author_sort	Naderi, Nima
title	Development Of Silicon And Silicon Carbide Nanostructures For Photonic Applications
title_short	Development Of Silicon And Silicon Carbide Nanostructures For Photonic Applications
title_full	Development Of Silicon And Silicon Carbide Nanostructures For Photonic Applications
title_fullStr	Development Of Silicon And Silicon Carbide Nanostructures For Photonic Applications
title_full_unstemmed	Development Of Silicon And Silicon Carbide Nanostructures For Photonic Applications
title_sort	development of silicon and silicon carbide nanostructures for photonic applications
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Fizik
publishDate	2013
url	http://eprints.usm.my/45163/1/Nima%20Naderi24.pdf
_version_	1747821461009072128

Development Of Silicon And Silicon Carbide Nanostructures For Photonic Applications

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