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Simulation and Comparison of the Photovoltaic Performance of Conventional and Inverted Organic Solar Cells with SnO 2 as Electron Transport Layers

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  • Mohamed El Amine Boudia

    (MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Qiuwang Wang

    (MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Cunlu Zhao

    (MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract

Extensive research on organic solar cells (OSCs) over the past decade has led to efficiency improvements exceeding 18%. Enhancing the efficacy of binary organic solar cells involves multiple factors, including the strategic selection of materials. The choice of donor and acceptor materials, which must exhibit complementary absorption spectra, is crucial. Additionally, optimizing the solar cell structure, such as adjusting the thickness of layers and incorporating hole-transporting layers, can further increase efficiency. In this study, we simulated three different novels within the use of the inorganic SnO 2 on the OSCs within this specific arrangement of structures using a drift-diffusion model: direct and inverted binary; direct ternary configurations of OSCs, specifically ITO/PEDOT: PSS/PM6:L8-BO/SnO 2 /Ag, ITO/SnO 2 /PM6:L8-BO/PEDOT: PSS/Ag; and FTO/PEDOT: PSS/PM6:D18:L8-BO/SnO 2 /Ag. These structures achieved power conversion efficiencies (PCE) of 18.34%, 18.37%, and 19.52%, respectively. The direct ternary device achieved an important V oc of 0.89 V and an FF of 82.3%, which is high in comparison with other simulated results in the literature. Our research focused on the role of SnO 2 as an inorganic electron transport layer in enhancing efficiency in all three configurations. We also evaluated the properties of these structures by simulating external quantum efficiency (EQE), which results in a broadened absorption spectrum from 380 nm to 900 nm for both binary and ternary devices. Furthermore, we measured the spectral distribution of absorbed photons, and photo-charge extraction by linearly increasing voltage (photo-CELIV) to assess charge extraction and generation rates as well as charge mobility. These measurements help establish a robust model for practical application.

Suggested Citation

  • Mohamed El Amine Boudia & Qiuwang Wang & Cunlu Zhao, 2024. "Simulation and Comparison of the Photovoltaic Performance of Conventional and Inverted Organic Solar Cells with SnO 2 as Electron Transport Layers," Energies, MDPI, vol. 17(13), pages 1-14, July.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:13:p:3302-:d:1429453
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    1. Alexander J. Gillett & Alberto Privitera & Rishat Dilmurat & Akchheta Karki & Deping Qian & Anton Pershin & Giacomo Londi & William K. Myers & Jaewon Lee & Jun Yuan & Seo-Jin Ko & Moritz K. Riede & Fe, 2021. "The role of charge recombination to triplet excitons in organic solar cells," Nature, Nature, vol. 597(7878), pages 666-671, September.
    2. Boudia Mohamed El Amine & Yi Zhou & Hongying Li & Qiuwang Wang & Jun Xi & Cunlu Zhao, 2023. "Latest Updates of Single-Junction Organic Solar Cells up to 20% Efficiency," Energies, MDPI, vol. 16(9), pages 1-12, May.
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