Boron doped amorphous carbon by negative bias enhanced chemical vapour deposition method from palm oil precursor for solar cell applications / Ishak Annuar

The boron doped amorphous carbon (a-C:B) thin films was successfully deposited by customized self-fabricated negative bias enhanced chemical vapor deposition using palm oil (C67H127O8) precursor. Current-voltage measurement, thickness profilometry, field-emission scanning electron microscopy (FESEM)...

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Main Author:	Annuar, Ishak
Format:	Thesis
Language:	English
Published:	2019
Subjects:	Salts
Online Access:	https://ir.uitm.edu.my/id/eprint/33764/1/33764.pdf
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spelling	my-uitm-ir.337642020-10-13T01:47:02Z Boron doped amorphous carbon by negative bias enhanced chemical vapour deposition method from palm oil precursor for solar cell applications / Ishak Annuar 2019 Annuar, Ishak Salts The boron doped amorphous carbon (a-C:B) thin films was successfully deposited by customized self-fabricated negative bias enhanced chemical vapor deposition using palm oil (C67H127O8) precursor. Current-voltage measurement, thickness profilometry, field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy, Raman spectroscopy, ultraviolet-visible-near-infrared spectroscopy, and solar simulator were conducted for investigate carbon thin film and solar cell devices, respectively. In this study, two deposition parameters were carried out; the substrate deposition temperatures (200 - 350°C), and negative bias (0 to -50 V). Based on this investigation, it can be found that, the a-C:B thin film deposited at different substrate temperatures (200 to 350°C) and negative biases (0 to -50 V) formed ohmic contact with gold. The conductivity of boron doped of a-C thin films was strongly influenced by substrate temperature, and negative bias under deposition condition. The conductivity of a-C:B thin films achieved approximately around 10-4 to 10-7 S.cm-1. The FESEM images revealed the minimum measured particles of a-C:B thin film were approximately 26.3 nm at 350°C and -50 V. High transmittance spectra (>75%) in the visible wavelength region of boron doped a-C:B thin film with absorption coefficient, a between 104 to 105 cm-1. The estimated optical band gap is ~2.05 to 1.92 eV decreased as substrate temperature increased and doping with boron. The lowest estimated optical band gap of a-C:B films is approximately around 1.90 eV deposited at different negative biases. For the first time the carbon solar cell from palm oil precursor with the configuration of Au/n-Si/p-C/Au achieved conversion efficiency (ŋ) of 0.1302%. Moreover, the highest ŋ of Au/n-Si/p-C:B/Au achieved is ~1.543% at 350°C and -20 V using grid method. Although the conversion efficiency is considerably low, but Au/n-Si/a- C:B/Au (~1.543%) fabricated by negative bias-CVD using carbon source of palm oil was considered new in this area. It is hope that, the use of palm oil precursors gave reasonable yield for carbon based solar cell in the near future. 2019 Thesis https://ir.uitm.edu.my/id/eprint/33764/ https://ir.uitm.edu.my/id/eprint/33764/1/33764.pdf text en public phd doctoral Universiti Teknologi MARA Shah Alam Faculty of Electrical Engineering Mahmood, Muhamad Rusop (Dr.)
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Mahmood, Muhamad Rusop (Dr.)
topic	Salts
spellingShingle	Salts Annuar, Ishak Boron doped amorphous carbon by negative bias enhanced chemical vapour deposition method from palm oil precursor for solar cell applications / Ishak Annuar
description	The boron doped amorphous carbon (a-C:B) thin films was successfully deposited by customized self-fabricated negative bias enhanced chemical vapor deposition using palm oil (C67H127O8) precursor. Current-voltage measurement, thickness profilometry, field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy, Raman spectroscopy, ultraviolet-visible-near-infrared spectroscopy, and solar simulator were conducted for investigate carbon thin film and solar cell devices, respectively. In this study, two deposition parameters were carried out; the substrate deposition temperatures (200 - 350°C), and negative bias (0 to -50 V). Based on this investigation, it can be found that, the a-C:B thin film deposited at different substrate temperatures (200 to 350°C) and negative biases (0 to -50 V) formed ohmic contact with gold. The conductivity of boron doped of a-C thin films was strongly influenced by substrate temperature, and negative bias under deposition condition. The conductivity of a-C:B thin films achieved approximately around 10-4 to 10-7 S.cm-1. The FESEM images revealed the minimum measured particles of a-C:B thin film were approximately 26.3 nm at 350°C and -50 V. High transmittance spectra (>75%) in the visible wavelength region of boron doped a-C:B thin film with absorption coefficient, a between 104 to 105 cm-1. The estimated optical band gap is ~2.05 to 1.92 eV decreased as substrate temperature increased and doping with boron. The lowest estimated optical band gap of a-C:B films is approximately around 1.90 eV deposited at different negative biases. For the first time the carbon solar cell from palm oil precursor with the configuration of Au/n-Si/p-C/Au achieved conversion efficiency (ŋ) of 0.1302%. Moreover, the highest ŋ of Au/n-Si/p-C:B/Au achieved is ~1.543% at 350°C and -20 V using grid method. Although the conversion efficiency is considerably low, but Au/n-Si/a- C:B/Au (~1.543%) fabricated by negative bias-CVD using carbon source of palm oil was considered new in this area. It is hope that, the use of palm oil precursors gave reasonable yield for carbon based solar cell in the near future.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Annuar, Ishak
author_facet	Annuar, Ishak
author_sort	Annuar, Ishak
title	Boron doped amorphous carbon by negative bias enhanced chemical vapour deposition method from palm oil precursor for solar cell applications / Ishak Annuar
title_short	Boron doped amorphous carbon by negative bias enhanced chemical vapour deposition method from palm oil precursor for solar cell applications / Ishak Annuar
title_full	Boron doped amorphous carbon by negative bias enhanced chemical vapour deposition method from palm oil precursor for solar cell applications / Ishak Annuar
title_fullStr	Boron doped amorphous carbon by negative bias enhanced chemical vapour deposition method from palm oil precursor for solar cell applications / Ishak Annuar
title_full_unstemmed	Boron doped amorphous carbon by negative bias enhanced chemical vapour deposition method from palm oil precursor for solar cell applications / Ishak Annuar
title_sort	boron doped amorphous carbon by negative bias enhanced chemical vapour deposition method from palm oil precursor for solar cell applications / ishak annuar
granting_institution	Universiti Teknologi MARA Shah Alam
granting_department	Faculty of Electrical Engineering
publishDate	2019
url	https://ir.uitm.edu.my/id/eprint/33764/1/33764.pdf
_version_	1783734251402821632

Boron doped amorphous carbon by negative bias enhanced chemical vapour deposition method from palm oil precursor for solar cell applications / Ishak Annuar

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