Optoelectronic Modeling of Graded-Bandgap Thin-Film Solar Cells

Thin-film solar cells are cheap and easy to manufacture but require improvements as their efficiencies are low compared to that of the commercially dominant crystalline-silicon solar cells. A coupled optoelectronic model was formulated and implemented along with the differential evolution algorithm to assess the efficacy of grading the bandgap of the absorber layer in three thin-film solar cells. Optimal grading was predicted to yield efficiency of 21.1% with a 2200-nm-thick CIGS absorber layer for the CIGS solar cell, 21.14% with a 870-nm-Thick CZTSSe layer for the CZTSSe solar cell, and 34.5% with a 2000-nm-Thick AlGaAs layer for the AlGaAs solar cell. For a solar cell with two bandgap-graded absorber layers, an efficiency of 34.45% was predicted with a 300-nm-Thick CIGS layer and a 870-nm-Thick CZTSSe layer. For colored solar cells, efficiency loss was predicted from 10% to 20%, depending upon the percentage of incoming solar photons rejected.

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Metadata

Work Title Optoelectronic Modeling of Graded-Bandgap Thin-Film Solar Cells
Access
Open Access
Creators
  1. F. Ahmad
  2. A. Lakhtakia
  3. P. B. Monk
  4. B. J. Civiletti
License In Copyright (Rights Reserved)
Work Type Conference Proceeding
Publisher
  1. 2021 IEEE 32nd International Conference on Microelectronics (MIEL)
Publication Date October 25, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1109/MIEL52794.2021.9569027
Deposited January 23, 2023

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Version 1
published

  • Created
  • Added Lakhtakia_21_6v5.pdf
  • Added Creator F. Ahmad
  • Added Creator A. Lakhtakia
  • Added Creator P. B. Monk
  • Added Creator B. J. Civiletti
  • Published
  • Updated Publisher, Publication Date Show Changes
    Publisher
    • 2021 IEEE 32nd International Conference on Microelectronics (MIEL)
    Publication Date
    • 2021-09-12
    • 2021-10-25