Role of micro and nanostructures in enhancing near IR optical absorption in Silicon

Cheow S. Leong, Ayu W. Azhari, Kamaruzzaman Sopian, Saleem H. Zaidi

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

Abstract

Role of micro and nanostructures in enhancing IR transmission in Si wafers has been investigated. Based on feature dimensions, incident light interaction can be described in terms of: (a) geometrical optics for wavelengths significantly smaller than surface dimensions, (b) diffractive optics for wavelengths comparable to surface features, and (c) physical optics for wavelengths substantially larger than surface features. Randomly distributed features in micro and nanoscale regimes were fabricated on identical Si wafers. A simple IR optical transmission system based on InGaAs photodetector and monochromator was developed for optical measurements. Optical transmission near the bandgap was substantially reduced by randomly distributed nanostructures likely attributed to diffractive optics. At the conference, details of several structures along with their reflection and transmission measurements will be presented in order to determine optimum surfaces for lowest transmission near the bandgap.

Original languageEnglish
Title of host publication2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1214-1217
Number of pages4
ISBN (Print)9781479943982
DOIs
Publication statusPublished - 15 Oct 2014
Event40th IEEE Photovoltaic Specialist Conference, PVSC 2014 - Denver
Duration: 8 Jun 201413 Jun 2014

Other

Other40th IEEE Photovoltaic Specialist Conference, PVSC 2014
CityDenver
Period8/6/1413/6/14

Fingerprint

Silicon
Light absorption
Nanostructures
Diffractive optics
Infrared transmission
Light transmission
Wavelength
Energy gap
Physical optics
Geometrical optics
Monochromators
Photodetectors

Keywords

  • IR transmission
  • Light trapping
  • Randomly textured micro and nanostructures
  • solar cells

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Leong, C. S., Azhari, A. W., Sopian, K., & Zaidi, S. H. (2014). Role of micro and nanostructures in enhancing near IR optical absorption in Silicon. In 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014 (pp. 1214-1217). [6925133] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2014.6925133

Role of micro and nanostructures in enhancing near IR optical absorption in Silicon. / Leong, Cheow S.; Azhari, Ayu W.; Sopian, Kamaruzzaman; Zaidi, Saleem H.

2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014. Institute of Electrical and Electronics Engineers Inc., 2014. p. 1214-1217 6925133.

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

Leong, CS, Azhari, AW, Sopian, K & Zaidi, SH 2014, Role of micro and nanostructures in enhancing near IR optical absorption in Silicon. in 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014., 6925133, Institute of Electrical and Electronics Engineers Inc., pp. 1214-1217, 40th IEEE Photovoltaic Specialist Conference, PVSC 2014, Denver, 8/6/14. https://doi.org/10.1109/PVSC.2014.6925133
Leong CS, Azhari AW, Sopian K, Zaidi SH. Role of micro and nanostructures in enhancing near IR optical absorption in Silicon. In 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014. Institute of Electrical and Electronics Engineers Inc. 2014. p. 1214-1217. 6925133 https://doi.org/10.1109/PVSC.2014.6925133
Leong, Cheow S. ; Azhari, Ayu W. ; Sopian, Kamaruzzaman ; Zaidi, Saleem H. / Role of micro and nanostructures in enhancing near IR optical absorption in Silicon. 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014. Institute of Electrical and Electronics Engineers Inc., 2014. pp. 1214-1217
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