Ultrathin GaAs solar cells with a silver back mirror

Nicolas Vandamme; Hung Ling Chen; Alexandre Gaucher; Benôt Behaghel; Aristide Lemaître; Andrea Cattoni; Christophe Dupuis; Nathalie Bardou; Jean Franҫois Guillemoles; Stephane Collin

doi:10.1109/JPHOTOV.2014.2371236

Ultrathin GaAs solar cells with a silver back mirror

Nicolas Vandamme
, Hung Ling Chen
, Alexandre Gaucher
, Benôt Behaghel
, Aristide Lemaître
, Andrea Cattoni
, Christophe Dupuis
, Nathalie Bardou
, Jean Franҫois Guillemoles
, Stephane Collin

Centre national de la recherche scientifique
University of Tokyo

Research output: Contribution to journal › Article › peer-review

Abstract

We report on the fabrication and characterization of ultrathin GaAs solar cells with a silver back mirror and absorber thicknesses of only t = 120 nm and t = 220 nm. The silver back mirror is combined with localized ohmic contacts. Without antireflection coating, Fabry-Perot resonances lead to strong enhancement over single-pass absorption (up to 4), and external quantum efficiency reaches 0.8 at resonance wavelengths. An analytical model is used to determine the resonance wavelengths and the absorption maxima. A short-circuit improvement of 27% results from the enhanced absorption induced by the Fabry-Perot resonances. By implementing an additional antireflection coating, short-circuit currents reach 16.3 mA/cm ² for t = 120 nm and 20.7 mA/cm ² for t = 220 nm, corresponding to efficiencies of 8.7 % and 12.9 %, respectively.

Original language	English
Article number	6996003
Pages (from-to)	565-570
Number of pages	6
Journal	IEEE Journal of Photovoltaics
Volume	5
Issue number	2
DOIs	https://doi.org/10.1109/JPHOTOV.2014.2371236
Publication status	Published - 1 Mar 2015

Keywords

GaAs
light-trapping
thin film

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10.1109/JPHOTOV.2014.2371236

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@article{3c905f91452d46a598ace46e9ada5475,

title = "Ultrathin GaAs solar cells with a silver back mirror",

abstract = " We report on the fabrication and characterization of ultrathin GaAs solar cells with a silver back mirror and absorber thicknesses of only t = 120 nm and t = 220 nm. The silver back mirror is combined with localized ohmic contacts. Without antireflection coating, Fabry-Perot resonances lead to strong enhancement over single-pass absorption (up to 4), and external quantum efficiency reaches 0.8 at resonance wavelengths. An analytical model is used to determine the resonance wavelengths and the absorption maxima. A short-circuit improvement of 27\% results from the enhanced absorption induced by the Fabry-Perot resonances. By implementing an additional antireflection coating, short-circuit currents reach 16.3 mA/cm 2 for t = 120 nm and 20.7 mA/cm 2 for t = 220 nm, corresponding to efficiencies of 8.7 \% and 12.9 \%, respectively.",

keywords = "GaAs, light-trapping, thin film",

author = "Nicolas Vandamme and Chen, \{Hung Ling\} and Alexandre Gaucher and Ben{\^o}t Behaghel and Aristide Lema{\^i}tre and Andrea Cattoni and Christophe Dupuis and Nathalie Bardou and Guillemoles, \{Jean Franҫois\} and Stephane Collin",

note = "Publisher Copyright: {\textcopyright} 2011-2012 IEEE.",

year = "2015",

month = mar,

day = "1",

doi = "10.1109/JPHOTOV.2014.2371236",

language = "English",

volume = "5",

pages = "565--570",

journal = "IEEE Journal of Photovoltaics",

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TY - JOUR

T1 - Ultrathin GaAs solar cells with a silver back mirror

AU - Vandamme, Nicolas

AU - Chen, Hung Ling

AU - Gaucher, Alexandre

AU - Behaghel, Benôt

AU - Lemaître, Aristide

AU - Cattoni, Andrea

AU - Dupuis, Christophe

AU - Bardou, Nathalie

AU - Guillemoles, Jean Franҫois

AU - Collin, Stephane

PY - 2015/3/1

Y1 - 2015/3/1

N2 - We report on the fabrication and characterization of ultrathin GaAs solar cells with a silver back mirror and absorber thicknesses of only t = 120 nm and t = 220 nm. The silver back mirror is combined with localized ohmic contacts. Without antireflection coating, Fabry-Perot resonances lead to strong enhancement over single-pass absorption (up to 4), and external quantum efficiency reaches 0.8 at resonance wavelengths. An analytical model is used to determine the resonance wavelengths and the absorption maxima. A short-circuit improvement of 27% results from the enhanced absorption induced by the Fabry-Perot resonances. By implementing an additional antireflection coating, short-circuit currents reach 16.3 mA/cm 2 for t = 120 nm and 20.7 mA/cm 2 for t = 220 nm, corresponding to efficiencies of 8.7 % and 12.9 %, respectively.

AB - We report on the fabrication and characterization of ultrathin GaAs solar cells with a silver back mirror and absorber thicknesses of only t = 120 nm and t = 220 nm. The silver back mirror is combined with localized ohmic contacts. Without antireflection coating, Fabry-Perot resonances lead to strong enhancement over single-pass absorption (up to 4), and external quantum efficiency reaches 0.8 at resonance wavelengths. An analytical model is used to determine the resonance wavelengths and the absorption maxima. A short-circuit improvement of 27% results from the enhanced absorption induced by the Fabry-Perot resonances. By implementing an additional antireflection coating, short-circuit currents reach 16.3 mA/cm 2 for t = 120 nm and 20.7 mA/cm 2 for t = 220 nm, corresponding to efficiencies of 8.7 % and 12.9 %, respectively.

KW - GaAs

KW - light-trapping

KW - thin film

U2 - 10.1109/JPHOTOV.2014.2371236

DO - 10.1109/JPHOTOV.2014.2371236

M3 - Article

AN - SCOPUS:85027916631

SN - 2156-3381

VL - 5

SP - 565

EP - 570

JO - IEEE Journal of Photovoltaics

JF - IEEE Journal of Photovoltaics

IS - 2

M1 - 6996003

ER -

Ultrathin GaAs solar cells with a silver back mirror

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Keywords

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