Optimization of light trapping in ultrathin nonhomogeneous CuIn1-ξGaξSe2 solar cell backed by 1D periodically corrugated backreflector

Faiz Ahmad, Tom H. Anderson, Peter B. Monk, Akhlesh Lakhtakia

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

1 Citation (Scopus)

Abstract

We studied the optimization of an ultrathin CuIn1-ξGaξSe2 (CIGS) solar cell with a nonhomogeneous CIGS absorber layer and backed by a 1D metallic periodically corrugated back-reflector (PCBR) with a rectangular profile. Nonhomogeneity in the CIGS absorber layer was modeled through either a sinusoidal or a linear bandgap variation along the thickness direction. The maximum power density for the AM1.5G spectrum was determined from the spectrum of the useful solar absorptance computed using the rigorous coupled-wave approach. Ultrathin solar cells with optimized PCBR and homogenous bandgap depending on the thickness of the CIGS layer were found to deliver the best photonic absorption characteristics. The open-circuit voltage, efficiency, and fill factor were calculated for the optimal designs using values of the reverse-saturation current density, ideality factor, and the series resistance density obtained from experimental results. The overall trend is that the effect of the PCBR becomes less prominent as the thickness of the CIGS absorber layer increases. Higher efficiency and fill factor can be achieved with a solar cell containing as 400-nm-thick CIGS layer compared to the conventional solar cell with a 2200-nm-thick CIGS layer.

Original languageEnglish (US)
Title of host publicationNanostructured Thin Films XI
EditorsTom G. Mackay, Akhlesh Lakhtakia
PublisherSPIE
ISBN (Electronic)9781510620339
DOIs
StatePublished - Jan 1 2018
EventNanostructured Thin Films XI 2018 - San Diego, United States
Duration: Aug 22 2018Aug 23 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10731
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherNanostructured Thin Films XI 2018
CountryUnited States
CitySan Diego
Period8/22/188/23/18

Fingerprint

Solar Cells
Trapping
Solar cells
solar cells
trapping
optimization
Optimization
Absorber
Reflector
reflectors
absorbers
Energy gap
Open circuit voltage
Photonics
absorptance
Current density
open circuit voltage
High Efficiency
Saturation
radiant flux density

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Ahmad, F., Anderson, T. H., Monk, P. B., & Lakhtakia, A. (2018). Optimization of light trapping in ultrathin nonhomogeneous CuIn1-ξGaξSe2 solar cell backed by 1D periodically corrugated backreflector. In T. G. Mackay, & A. Lakhtakia (Eds.), Nanostructured Thin Films XI [107310L] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10731). SPIE. https://doi.org/10.1117/12.2320672
Ahmad, Faiz ; Anderson, Tom H. ; Monk, Peter B. ; Lakhtakia, Akhlesh. / Optimization of light trapping in ultrathin nonhomogeneous CuIn1-ξGaξSe2 solar cell backed by 1D periodically corrugated backreflector. Nanostructured Thin Films XI. editor / Tom G. Mackay ; Akhlesh Lakhtakia. SPIE, 2018. (Proceedings of SPIE - The International Society for Optical Engineering).
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abstract = "We studied the optimization of an ultrathin CuIn1-ξGaξSe2 (CIGS) solar cell with a nonhomogeneous CIGS absorber layer and backed by a 1D metallic periodically corrugated back-reflector (PCBR) with a rectangular profile. Nonhomogeneity in the CIGS absorber layer was modeled through either a sinusoidal or a linear bandgap variation along the thickness direction. The maximum power density for the AM1.5G spectrum was determined from the spectrum of the useful solar absorptance computed using the rigorous coupled-wave approach. Ultrathin solar cells with optimized PCBR and homogenous bandgap depending on the thickness of the CIGS layer were found to deliver the best photonic absorption characteristics. The open-circuit voltage, efficiency, and fill factor were calculated for the optimal designs using values of the reverse-saturation current density, ideality factor, and the series resistance density obtained from experimental results. The overall trend is that the effect of the PCBR becomes less prominent as the thickness of the CIGS absorber layer increases. Higher efficiency and fill factor can be achieved with a solar cell containing as 400-nm-thick CIGS layer compared to the conventional solar cell with a 2200-nm-thick CIGS layer.",
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Ahmad, F, Anderson, TH, Monk, PB & Lakhtakia, A 2018, Optimization of light trapping in ultrathin nonhomogeneous CuIn1-ξGaξSe2 solar cell backed by 1D periodically corrugated backreflector. in TG Mackay & A Lakhtakia (eds), Nanostructured Thin Films XI., 107310L, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10731, SPIE, Nanostructured Thin Films XI 2018, San Diego, United States, 8/22/18. https://doi.org/10.1117/12.2320672

Optimization of light trapping in ultrathin nonhomogeneous CuIn1-ξGaξSe2 solar cell backed by 1D periodically corrugated backreflector. / Ahmad, Faiz; Anderson, Tom H.; Monk, Peter B.; Lakhtakia, Akhlesh.

Nanostructured Thin Films XI. ed. / Tom G. Mackay; Akhlesh Lakhtakia. SPIE, 2018. 107310L (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10731).

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

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AB - We studied the optimization of an ultrathin CuIn1-ξGaξSe2 (CIGS) solar cell with a nonhomogeneous CIGS absorber layer and backed by a 1D metallic periodically corrugated back-reflector (PCBR) with a rectangular profile. Nonhomogeneity in the CIGS absorber layer was modeled through either a sinusoidal or a linear bandgap variation along the thickness direction. The maximum power density for the AM1.5G spectrum was determined from the spectrum of the useful solar absorptance computed using the rigorous coupled-wave approach. Ultrathin solar cells with optimized PCBR and homogenous bandgap depending on the thickness of the CIGS layer were found to deliver the best photonic absorption characteristics. The open-circuit voltage, efficiency, and fill factor were calculated for the optimal designs using values of the reverse-saturation current density, ideality factor, and the series resistance density obtained from experimental results. The overall trend is that the effect of the PCBR becomes less prominent as the thickness of the CIGS absorber layer increases. Higher efficiency and fill factor can be achieved with a solar cell containing as 400-nm-thick CIGS layer compared to the conventional solar cell with a 2200-nm-thick CIGS layer.

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Ahmad F, Anderson TH, Monk PB, Lakhtakia A. Optimization of light trapping in ultrathin nonhomogeneous CuIn1-ξGaξSe2 solar cell backed by 1D periodically corrugated backreflector. In Mackay TG, Lakhtakia A, editors, Nanostructured Thin Films XI. SPIE. 2018. 107310L. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.2320672