Micrometer-thin crystalline-silicon solar cells integrating numerically optimized 2-d photonic crystals

Valerie Depauw, Xianqin Meng, Ounsi El Daif, Guillaume Gomard, Loic Lalouat, Emmanuel Drouard, Christos Trompoukis, Alain Fave, Christian Seassal, Ivan Gordon

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

A 2-D photonic crystal was integrated experimentally into a thin-film crystalline-silicon solar cell of 1-μm thickness, after numerical optimization maximizing light absorption in the active material. The photonic crystal boosted the short-circuit current of the cell, but it also damaged its open-circuit voltage and fill factor, which led to an overall decrease in performances. Comparisons between modeled and actual optical behaviors of the cell, and between ideal and actual morphologies, show the global robustness of the nanostructure to experimental deviations, but its particular sensitivity to the conformality of the top coatings and the spread in pattern dimensions, which should not be neglected in the optical model. As for the electrical behavior, the measured internal quantum efficiency shows the strong parasitic absorptions from the transparent conductive oxide and from the back-reflector, as well as the negative impact of the nanopattern on surface passivation. Our exemplifying case, thus, illustrates and experimentally confirms two recommendations for future integration of surface nanostructures for light trapping purposes: 1) the necessity to optimize absorption not for the total stack but for the single active material, and 2) the necessity to avoid damage to the active material by pattern etching.

Original languageEnglish
Article number6655881
Pages (from-to)215-223
Number of pages9
JournalIEEE Journal of Photovoltaics
Volume4
Issue number1
DOIs
Publication statusPublished - Jan 2014
Externally publishedYes

Fingerprint

Silicon solar cells
Photonic crystals
micrometers
solar cells
photonics
Crystalline materials
Nanostructures
short circuit currents
electromagnetic absorption
open circuit voltage
cells
recommendations
passivity
reflectors
crystals
quantum efficiency
trapping
etching
Open circuit voltage
damage

Keywords

  • Finite-difference time domain (FDTD) simulation
  • heterojunction
  • laser holographic lithography
  • light trapping
  • nanophotonics
  • photonic crystals
  • photovoltaic cells
  • thin-film crystalline silicon

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Depauw, V., Meng, X., El Daif, O., Gomard, G., Lalouat, L., Drouard, E., ... Gordon, I. (2014). Micrometer-thin crystalline-silicon solar cells integrating numerically optimized 2-d photonic crystals. IEEE Journal of Photovoltaics, 4(1), 215-223. [6655881]. https://doi.org/10.1109/JPHOTOV.2013.2286521

Micrometer-thin crystalline-silicon solar cells integrating numerically optimized 2-d photonic crystals. / Depauw, Valerie; Meng, Xianqin; El Daif, Ounsi; Gomard, Guillaume; Lalouat, Loic; Drouard, Emmanuel; Trompoukis, Christos; Fave, Alain; Seassal, Christian; Gordon, Ivan.

In: IEEE Journal of Photovoltaics, Vol. 4, No. 1, 6655881, 01.2014, p. 215-223.

Research output: Contribution to journalArticle

Depauw, V, Meng, X, El Daif, O, Gomard, G, Lalouat, L, Drouard, E, Trompoukis, C, Fave, A, Seassal, C & Gordon, I 2014, 'Micrometer-thin crystalline-silicon solar cells integrating numerically optimized 2-d photonic crystals', IEEE Journal of Photovoltaics, vol. 4, no. 1, 6655881, pp. 215-223. https://doi.org/10.1109/JPHOTOV.2013.2286521
Depauw, Valerie ; Meng, Xianqin ; El Daif, Ounsi ; Gomard, Guillaume ; Lalouat, Loic ; Drouard, Emmanuel ; Trompoukis, Christos ; Fave, Alain ; Seassal, Christian ; Gordon, Ivan. / Micrometer-thin crystalline-silicon solar cells integrating numerically optimized 2-d photonic crystals. In: IEEE Journal of Photovoltaics. 2014 ; Vol. 4, No. 1. pp. 215-223.
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