Deeply etched grating structures for enhanced absorption in thin C-Si solar cells

Saleem H. Zaidi, Richard Marquadt, Babar Minhas, J. W. Tringe

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

9 Citations (Scopus)

Abstract

Sub-wavelength periodic structures in crystalline-silicon (c-Si) for solar cell applications can be designed for maximizing optical absorption in thin films. We have investigated optical response of deeply etched c-Si grating structures using rigorous modeling, hemispherical reflectance, one-sun LIV, and internal quantum efficiency measurements. Model calculations predict that almost ∼ 100% optical absorption can be achieved in subwavelength 2D structures etched to a depth of ∼ 15 μm. Using advanced reactive ion etching techniques, subwavelength deeply etched grating structures have been fabricated and integrated into solar cells. Preliminary one-sun solar cell measurements from ∼ 10-μm 2D period structures have demonstrated short-circuit current enhancement of ∼ 10 mA. The cell efficiencies were poor due to the lack of surface passivation and emitter optimization. Subwavelength grating solar cells failed to provide any performance boost probably due to the lack of surface passivation. Optimization of emitter formation on these types of deeply etched grating surfaces is expected to lead to high-efficiency, thin-film c-Si solar cells.

Original languageEnglish
Title of host publicationConference Record of the IEEE Photovoltaic Specialists Conference
Pages1290-1293
Number of pages4
Publication statusPublished - 2002
Externally publishedYes
Event29th IEEE Photovoltaic Specialists Conference - New Orleans, LA, United States
Duration: 19 May 200224 May 2002

Other

Other29th IEEE Photovoltaic Specialists Conference
CountryUnited States
CityNew Orleans, LA
Period19/5/0224/5/02

Fingerprint

Solar cells
solar cells
gratings
Crystalline materials
Passivation
Sun
Light absorption
passivity
emitters
sun
optical absorption
Thin films
Silicon
Periodic structures
Silicon solar cells
Reactive ion etching
Quantum efficiency
optimization
Short circuit currents
silicon

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Condensed Matter Physics

Cite this

Zaidi, S. H., Marquadt, R., Minhas, B., & Tringe, J. W. (2002). Deeply etched grating structures for enhanced absorption in thin C-Si solar cells. In Conference Record of the IEEE Photovoltaic Specialists Conference (pp. 1290-1293)

Deeply etched grating structures for enhanced absorption in thin C-Si solar cells. / Zaidi, Saleem H.; Marquadt, Richard; Minhas, Babar; Tringe, J. W.

Conference Record of the IEEE Photovoltaic Specialists Conference. 2002. p. 1290-1293.

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

Zaidi, SH, Marquadt, R, Minhas, B & Tringe, JW 2002, Deeply etched grating structures for enhanced absorption in thin C-Si solar cells. in Conference Record of the IEEE Photovoltaic Specialists Conference. pp. 1290-1293, 29th IEEE Photovoltaic Specialists Conference, New Orleans, LA, United States, 19/5/02.
Zaidi SH, Marquadt R, Minhas B, Tringe JW. Deeply etched grating structures for enhanced absorption in thin C-Si solar cells. In Conference Record of the IEEE Photovoltaic Specialists Conference. 2002. p. 1290-1293
Zaidi, Saleem H. ; Marquadt, Richard ; Minhas, Babar ; Tringe, J. W. / Deeply etched grating structures for enhanced absorption in thin C-Si solar cells. Conference Record of the IEEE Photovoltaic Specialists Conference. 2002. pp. 1290-1293
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