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The Crucial Role of Quaternary Mixtures of Active Layer in Organic Indoor Solar Cells

Author

Listed:
  • Premkumar Vincent

    (School of Electronics Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Korea)

  • Jae Won Shim

    (Research Center for Photoenergy Harvesting & Conversion Technology (phct), Division of Electronics and Electrical Engineering, Dongguk University, Seoul 04620, Korea)

  • Jaewon Jang

    (School of Electronics Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Korea)

  • In Man Kang

    (School of Electronics Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Korea)

  • Philippe Lang

    (ITODYS University Paris Diderot CNRS UMR 7086 (Paris 7), 75013 Paris, France)

  • Jin-Hyuk Bae

    (School of Electronics Engineering, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Korea)

  • Hyeok Kim

    (Department of Electrical Engineering, Engineering Research Institute (ERI), Gyeongsang National University, 501 Jinjudaero, Jinju, Gyeongnam 52828, Korea)

Abstract

A bulk heterojunction (BHJ) consisting of more than one donor/acceptor is one plausible way to improve the charge transport and/or the spectral absorption range in organic solar cells. Ternary and quaternary solar cells have shown promise in this regard. However, quaternary structures have not yet been intensively tested under indoor lighting conditions. A finite-difference time-domain (FDTD)-based simulation was used to solve for the electric field intensity distribution inside a quaternary photovoltaic device illuminated by 500 lx indoor white light emitting diodes (LEDs). We found that quaternary indoor photovoltaics (IPVs) showed peculiarly high oscillations in the simulated ideal short-circuit current density (J sc,ideal ). Here, we simulated the electric field intensity inside the photovoltaic, compared it to single BHJ photovoltaics, and deduced that the electric field intensity inside the active layer of the IPV was highly sensitive to its thickness due to interference between the incident light and the light reflecting from the back electrode. We also found that Poly[N-9′-hepta-decanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) acted as the primary light absorber in the quaternary blend while poly({4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl}{3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl}) (PTB7) acted primarily as a cascade energy level and secondarily as a supplementary light absorber.

Suggested Citation

  • Premkumar Vincent & Jae Won Shim & Jaewon Jang & In Man Kang & Philippe Lang & Jin-Hyuk Bae & Hyeok Kim, 2019. "The Crucial Role of Quaternary Mixtures of Active Layer in Organic Indoor Solar Cells," Energies, MDPI, vol. 12(10), pages 1-9, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:10:p:1838-:d:231268
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    References listed on IDEAS

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    1. Minwoo Nam & Minjeong Cha & Hyun Hwi Lee & Kahyun Hur & Kyu-Tae Lee & Jaehong Yoo & Il Ki Han & S. Joon Kwon & Doo-Hyun Ko, 2017. "Long-term efficient organic photovoltaics based on quaternary bulk heterojunctions," Nature Communications, Nature, vol. 8(1), pages 1-10, April.
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