Enhancement of optical absorption in thin-film silicon solar cells in silicon-on-insulator (SOI) configuration

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3 Citations (Scopus)

Abstract

High performance in crystalline thin (∼ 10 μm) film silicon solar cells requires complete optical absorption over its spectral range. Geometrical schemes are ineffective due to their large feature dimensions. Enhanced optical absorption can be achieved through two mechanisms based on diffractive and physical optics. In diffractive approach, light confinement is achieved through obliquely propagating transmission orders that effectively fill the frequency space. In the physical optics approach, rigorous coupled wave analysis is used to calculate optical absorption in subwavelength grating structures based on wave guiding mechanism, A 10-μm thick Si film in SOI configuration was chosen to perform a comparative evaluation of these two approaches. Optical transmission of planar Si films was compared with randomly textured and deeply etched two-dimensional gratings structures. Transmission from random structures was diffuse and translucent, while that from gratings, was weak and wavelength-dependent. Although SOI substrates are not practical for large-scale manufacturing, they have been determined to highly effective for understanding and optimizing optical transmission and device performance.

Original languageEnglish
Pages (from-to)358-364
Number of pages7
JournalEuropean Journal of Scientific Research
Volume24
Issue number3
Publication statusPublished - 2008

Fingerprint

photovoltaic cells
Silicon-on-insulator
Optical Absorption
Silicon solar cells
Silicon
Solar Cells
silicon
Light absorption
Thin Films
Physical optics
Enhancement
Physical Optics
Gratings
Light transmission
optics
Configuration
Diffractive optics
Optical Devices
antineoplaston A10
Diffractive Optics

Keywords

  • Optical absorption enhancement
  • Thin-film silicon solar cell

ASJC Scopus subject areas

  • General

Cite this

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abstract = "High performance in crystalline thin (∼ 10 μm) film silicon solar cells requires complete optical absorption over its spectral range. Geometrical schemes are ineffective due to their large feature dimensions. Enhanced optical absorption can be achieved through two mechanisms based on diffractive and physical optics. In diffractive approach, light confinement is achieved through obliquely propagating transmission orders that effectively fill the frequency space. In the physical optics approach, rigorous coupled wave analysis is used to calculate optical absorption in subwavelength grating structures based on wave guiding mechanism, A 10-μm thick Si film in SOI configuration was chosen to perform a comparative evaluation of these two approaches. Optical transmission of planar Si films was compared with randomly textured and deeply etched two-dimensional gratings structures. Transmission from random structures was diffuse and translucent, while that from gratings, was weak and wavelength-dependent. Although SOI substrates are not practical for large-scale manufacturing, they have been determined to highly effective for understanding and optimizing optical transmission and device performance.",
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AU - Sopian, Kamaruzzaman

AU - Asim, Nilofar

AU - Amin, Nowshad

AU - Zaidi, Saleem H.

PY - 2008

Y1 - 2008

N2 - High performance in crystalline thin (∼ 10 μm) film silicon solar cells requires complete optical absorption over its spectral range. Geometrical schemes are ineffective due to their large feature dimensions. Enhanced optical absorption can be achieved through two mechanisms based on diffractive and physical optics. In diffractive approach, light confinement is achieved through obliquely propagating transmission orders that effectively fill the frequency space. In the physical optics approach, rigorous coupled wave analysis is used to calculate optical absorption in subwavelength grating structures based on wave guiding mechanism, A 10-μm thick Si film in SOI configuration was chosen to perform a comparative evaluation of these two approaches. Optical transmission of planar Si films was compared with randomly textured and deeply etched two-dimensional gratings structures. Transmission from random structures was diffuse and translucent, while that from gratings, was weak and wavelength-dependent. Although SOI substrates are not practical for large-scale manufacturing, they have been determined to highly effective for understanding and optimizing optical transmission and device performance.

AB - High performance in crystalline thin (∼ 10 μm) film silicon solar cells requires complete optical absorption over its spectral range. Geometrical schemes are ineffective due to their large feature dimensions. Enhanced optical absorption can be achieved through two mechanisms based on diffractive and physical optics. In diffractive approach, light confinement is achieved through obliquely propagating transmission orders that effectively fill the frequency space. In the physical optics approach, rigorous coupled wave analysis is used to calculate optical absorption in subwavelength grating structures based on wave guiding mechanism, A 10-μm thick Si film in SOI configuration was chosen to perform a comparative evaluation of these two approaches. Optical transmission of planar Si films was compared with randomly textured and deeply etched two-dimensional gratings structures. Transmission from random structures was diffuse and translucent, while that from gratings, was weak and wavelength-dependent. Although SOI substrates are not practical for large-scale manufacturing, they have been determined to highly effective for understanding and optimizing optical transmission and device performance.

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