Fabrication And Characterization Of Black Silicon For Heterojunction Solar Cells

Black silicon (b-Si) is a promising technology that reduces broadband reflection within 300-1100 nm wavelength region and improves light absorption in crystalline silicon (c-Si). B-Si consists of a surface with random nanowires or a combination of nanowires and microtextures (hybrid textures) which...

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Main Author:	Abdulkadir, Auwal
Format:	Thesis
Language:	English
Published:	2022
Subjects:	QC1 Physics (General)
Online Access:	http://eprints.usm.my/59507/1/24%20Pages%20from%20AUWAL%20ABDULKADIR.pdf
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spelling	my-usm-ep.595072023-10-19T02:09:00Z Fabrication And Characterization Of Black Silicon For Heterojunction Solar Cells 2022-01 Abdulkadir, Auwal QC1 Physics (General) Black silicon (b-Si) is a promising technology that reduces broadband reflection within 300-1100 nm wavelength region and improves light absorption in crystalline silicon (c-Si). B-Si consists of a surface with random nanowires or a combination of nanowires and microtextures (hybrid textures) which leads to a refractive index grading effect at the air/c-Si interface. In this work, electroless metal-assisted chemical etching (MACE) is used to fabricate b-Si. One-step MACE, two-step MACE and hybrid microtextures/nanotextures investigating different effects such as etching time, etchants concentration, silver nanoparticles (Ag NPs) layer thickness towards surface morphological and optical properties (within 300-1100 nm wavelength region) of the b-Si are carried out. Two step MACE involve shorter AgNO3:HF dip time. The hybrid texturing involves prior etching in NaOH to produce pyramids. For one-step MACE, nanowires with an average length of ~2.9 μm and an average diameter of ~120 nm are demonstrated. Weighted average reflection (WAR) of 6.0% has been realized. For two-step MACE, nanowires with an average length of 577 nm and diameter of ~200 nm are produced with WAR of ~5.5%. 2022-01 Thesis http://eprints.usm.my/59507/ http://eprints.usm.my/59507/1/24%20Pages%20from%20AUWAL%20ABDULKADIR.pdf application/pdf en public phd doctoral Perpustakaan Hamzah Sendut Pusat Pengajian Sains Fizik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QC1 Physics (General)
spellingShingle	QC1 Physics (General) Abdulkadir, Auwal Fabrication And Characterization Of Black Silicon For Heterojunction Solar Cells
description	Black silicon (b-Si) is a promising technology that reduces broadband reflection within 300-1100 nm wavelength region and improves light absorption in crystalline silicon (c-Si). B-Si consists of a surface with random nanowires or a combination of nanowires and microtextures (hybrid textures) which leads to a refractive index grading effect at the air/c-Si interface. In this work, electroless metal-assisted chemical etching (MACE) is used to fabricate b-Si. One-step MACE, two-step MACE and hybrid microtextures/nanotextures investigating different effects such as etching time, etchants concentration, silver nanoparticles (Ag NPs) layer thickness towards surface morphological and optical properties (within 300-1100 nm wavelength region) of the b-Si are carried out. Two step MACE involve shorter AgNO3:HF dip time. The hybrid texturing involves prior etching in NaOH to produce pyramids. For one-step MACE, nanowires with an average length of ~2.9 μm and an average diameter of ~120 nm are demonstrated. Weighted average reflection (WAR) of 6.0% has been realized. For two-step MACE, nanowires with an average length of 577 nm and diameter of ~200 nm are produced with WAR of ~5.5%.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Abdulkadir, Auwal
author_facet	Abdulkadir, Auwal
author_sort	Abdulkadir, Auwal
title	Fabrication And Characterization Of Black Silicon For Heterojunction Solar Cells
title_short	Fabrication And Characterization Of Black Silicon For Heterojunction Solar Cells
title_full	Fabrication And Characterization Of Black Silicon For Heterojunction Solar Cells
title_fullStr	Fabrication And Characterization Of Black Silicon For Heterojunction Solar Cells
title_full_unstemmed	Fabrication And Characterization Of Black Silicon For Heterojunction Solar Cells
title_sort	fabrication and characterization of black silicon for heterojunction solar cells
granting_institution	Perpustakaan Hamzah Sendut
granting_department	Pusat Pengajian Sains Fizik
publishDate	2022
url	http://eprints.usm.my/59507/1/24%20Pages%20from%20AUWAL%20ABDULKADIR.pdf
_version_	1783729568989839360

Fabrication And Characterization Of Black Silicon For Heterojunction Solar Cells

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