Absorption in thin Si films with randomly formed subwavelength structures

Saleem H. Zaidi, Carolyn Matzke, Laure Koltunski, Karen DeZetter

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Thin-film (<25 μm) solar cells are desirable due to their low cost and reduced bulk recombination losses. However, due to weak near infra red optical absorption of c-Si, cell efficiency is poor. Due to heir large feature dimensions, geometrical texturing techniques are not suitable for thin film solar cells. We have investigated sub-wavelength diffractive optical approach to reduce surface reflection as well as enhance near IR optical absorption. For experimental evaluation, thinned Si films were bonded to pyrex and randomly textured to form subwavelength surfaces. A metal film was deposited on the back surface to achieve optical confinement. Near-incidence spectral optical measurements showed - ∼100% optical absorption over 400-1200-nm spectral range. Rigorous coupled wave analysis was used to demonstrate diffractive scattering into diffraction orders was responsible for optical absorption.

Original languageEnglish
Title of host publicationConference Record of the IEEE Photovoltaic Specialists Conference
Pages1145-1148
Number of pages4
Publication statusPublished - 2005
Externally publishedYes
Event31st IEEE Photovoltaic Specialists Conference - 2005 - Lake Buena Vista, FL, United States
Duration: 3 Jan 20057 Jan 2005

Other

Other31st IEEE Photovoltaic Specialists Conference - 2005
CountryUnited States
CityLake Buena Vista, FL
Period3/1/057/1/05

Fingerprint

Light absorption
optical absorption
thin films
solar cells
Texturing
borosilicate glass
metal films
optical measurement
Solar cells
incidence
Diffraction
Scattering
Infrared radiation
Thin films
Wavelength
evaluation
Metals
cells
scattering
diffraction

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Control and Systems Engineering

Cite this

Zaidi, S. H., Matzke, C., Koltunski, L., & DeZetter, K. (2005). Absorption in thin Si films with randomly formed subwavelength structures. In Conference Record of the IEEE Photovoltaic Specialists Conference (pp. 1145-1148)

Absorption in thin Si films with randomly formed subwavelength structures. / Zaidi, Saleem H.; Matzke, Carolyn; Koltunski, Laure; DeZetter, Karen.

Conference Record of the IEEE Photovoltaic Specialists Conference. 2005. p. 1145-1148.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Zaidi, SH, Matzke, C, Koltunski, L & DeZetter, K 2005, Absorption in thin Si films with randomly formed subwavelength structures. in Conference Record of the IEEE Photovoltaic Specialists Conference. pp. 1145-1148, 31st IEEE Photovoltaic Specialists Conference - 2005, Lake Buena Vista, FL, United States, 3/1/05.
Zaidi SH, Matzke C, Koltunski L, DeZetter K. Absorption in thin Si films with randomly formed subwavelength structures. In Conference Record of the IEEE Photovoltaic Specialists Conference. 2005. p. 1145-1148
Zaidi, Saleem H. ; Matzke, Carolyn ; Koltunski, Laure ; DeZetter, Karen. / Absorption in thin Si films with randomly formed subwavelength structures. Conference Record of the IEEE Photovoltaic Specialists Conference. 2005. pp. 1145-1148
@inproceedings{10ee1a3440954ac593d007848fe47ae5,
title = "Absorption in thin Si films with randomly formed subwavelength structures",
abstract = "Thin-film (<25 μm) solar cells are desirable due to their low cost and reduced bulk recombination losses. However, due to weak near infra red optical absorption of c-Si, cell efficiency is poor. Due to heir large feature dimensions, geometrical texturing techniques are not suitable for thin film solar cells. We have investigated sub-wavelength diffractive optical approach to reduce surface reflection as well as enhance near IR optical absorption. For experimental evaluation, thinned Si films were bonded to pyrex and randomly textured to form subwavelength surfaces. A metal film was deposited on the back surface to achieve optical confinement. Near-incidence spectral optical measurements showed - ∼100{\%} optical absorption over 400-1200-nm spectral range. Rigorous coupled wave analysis was used to demonstrate diffractive scattering into diffraction orders was responsible for optical absorption.",
author = "Zaidi, {Saleem H.} and Carolyn Matzke and Laure Koltunski and Karen DeZetter",
year = "2005",
language = "English",
pages = "1145--1148",
booktitle = "Conference Record of the IEEE Photovoltaic Specialists Conference",

}

TY - GEN

T1 - Absorption in thin Si films with randomly formed subwavelength structures

AU - Zaidi, Saleem H.

AU - Matzke, Carolyn

AU - Koltunski, Laure

AU - DeZetter, Karen

PY - 2005

Y1 - 2005

N2 - Thin-film (<25 μm) solar cells are desirable due to their low cost and reduced bulk recombination losses. However, due to weak near infra red optical absorption of c-Si, cell efficiency is poor. Due to heir large feature dimensions, geometrical texturing techniques are not suitable for thin film solar cells. We have investigated sub-wavelength diffractive optical approach to reduce surface reflection as well as enhance near IR optical absorption. For experimental evaluation, thinned Si films were bonded to pyrex and randomly textured to form subwavelength surfaces. A metal film was deposited on the back surface to achieve optical confinement. Near-incidence spectral optical measurements showed - ∼100% optical absorption over 400-1200-nm spectral range. Rigorous coupled wave analysis was used to demonstrate diffractive scattering into diffraction orders was responsible for optical absorption.

AB - Thin-film (<25 μm) solar cells are desirable due to their low cost and reduced bulk recombination losses. However, due to weak near infra red optical absorption of c-Si, cell efficiency is poor. Due to heir large feature dimensions, geometrical texturing techniques are not suitable for thin film solar cells. We have investigated sub-wavelength diffractive optical approach to reduce surface reflection as well as enhance near IR optical absorption. For experimental evaluation, thinned Si films were bonded to pyrex and randomly textured to form subwavelength surfaces. A metal film was deposited on the back surface to achieve optical confinement. Near-incidence spectral optical measurements showed - ∼100% optical absorption over 400-1200-nm spectral range. Rigorous coupled wave analysis was used to demonstrate diffractive scattering into diffraction orders was responsible for optical absorption.

UR - http://www.scopus.com/inward/record.url?scp=27944461893&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=27944461893&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:27944461893

SP - 1145

EP - 1148

BT - Conference Record of the IEEE Photovoltaic Specialists Conference

ER -