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<p>Organic solar cells (OSCs) using the 5&#xa0;nm PNDIT-F3N and 10&#xa0;nm bathocuproine (BCP) films as cathode-modifying layers have been characterized under both 1 sun AM 1.5G and 1000&#xa0;lx indoor illuminations; the photovoltaic performances of the devices have been simulated via the full model of Shockley equation. It is found that the PNDIT-F3N enables higher power conversion efficiency (PCE) than the BCP under 1 sun illumination. Under 1000&#xa0;lx illumination, the PNDIT-F3N realizes slightly smaller PCE based on the active layer with solid additive than the BCP, while PNDIT-F3N and BCP enable similar PCEs based on the active layer without solid additive. The simulations reveal that the photogenerated current and shunt resistance are two competing indices under low-intensity light, i.e., the increase of photogenerated current tends to decrease shunt resistance; this is the main reason to limit the PCEs of indoor OSCs. The current research indicates that to increase the photogenerated current without markedly sacrificing the shunt resistance of device is the key to push forward indoor organic photovoltaics.</p>

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The impacts of cathode-modifying layers on the indoor performance of organic solar cells

  • 期刊论文

  • 发表日期：

    2026年7月1日

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  • Zichen Liu,
  • Wei Zong,
  • Dashan Qin

摘要

Organic solar cells (OSCs) using the 5 nm PNDIT-F3N and 10 nm bathocuproine (BCP) films as cathode-modifying layers have been characterized under both 1 sun AM 1.5G and 1000 lx indoor illuminations; the photovoltaic performances of the devices have been simulated via the full model of Shockley equation. It is found that the PNDIT-F3N enables higher power conversion efficiency (PCE) than the BCP under 1 sun illumination. Under 1000 lx illumination, the PNDIT-F3N realizes slightly smaller PCE based on the active layer with solid additive than the BCP, while PNDIT-F3N and BCP enable similar PCEs based on the active layer without solid additive. The simulations reveal that the photogenerated current and shunt resistance are two competing indices under low-intensity light, i.e., the increase of photogenerated current tends to decrease shunt resistance; this is the main reason to limit the PCEs of indoor OSCs. The current research indicates that to increase the photogenerated current without markedly sacrificing the shunt resistance of device is the key to push forward indoor organic photovoltaics.