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<p>The defects resulting from ion escape at the NiO<sub><i>x</i></sub>/perovskite interface will induce voltage losses of wide-bandgap (WBG) perovskite front cells and affect the efficiency and stability of the perovskite/organic tandem solar cells (PO-TSCs). Herein, we report a tryptophan (TRP) molecules-assisted iodine capture strategy to suppress the halogen ion migration induced degradation and phase segregation initiated on the NiO<sub><i>x</i></sub> side under UV-light exposure. The–NH<sub>2</sub> and–COO<sup>−</sup> in the TRP molecule can incorporate with the WBG perovskite by strong hydrogen bonding and chemical interactions to stabilize the crystal structure and establish an anchored interface on NiO<sub><i>x</i></sub> substrate. The optimized charge transport and minimized non-radiative recombination at the interface boost the efficiency up to 19.04% with a <i>V</i><sub>OC</sub> of 1.30 V, which is the highest <i>V</i><sub>OC</sub> for the NiO<sub><i>x</i></sub>-based WBG PSCs without self-assembled materials (SAMs) monolayer. The unencapsulated devices demonstrate a <i>T</i><sub>80</sub> lifetime of over 800 h in the glove box. Remarkably, the corresponding PO-TSCs achieve a champion efficiency of 24.30% for small-area devices and 22.87% for large-area devices (1.05 cm<sup>2</sup>), which show negligible hysteresis phenomenon. The unencapsulated PO-TSCs can maintain 80% of the initial efficiency after 500 h UV-light irradiation (365 nm, 10 mW cm<sup>−2</sup>).</p>

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Efficient and stable perovskite/organic tandem solar cells via molecules-assisted iodine capture under ultraviolet light

  • 期刊论文

  • 发表日期：

    2025年3月17日

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  • Shuo Yao,
  • Cong Liu,
  • Jiaxiang Lv,
  • Hongxiang Li,
  • Chenxiang Gong,
  • Qian Ye,
  • Yuelong Zhou,
  • Runying Dai,
  • Xiaotian Hu,
  • Zengqi Huang,
  • Yiwang Chen

摘要

The defects resulting from ion escape at the NiOx/perovskite interface will induce voltage losses of wide-bandgap (WBG) perovskite front cells and affect the efficiency and stability of the perovskite/organic tandem solar cells (PO-TSCs). Herein, we report a tryptophan (TRP) molecules-assisted iodine capture strategy to suppress the halogen ion migration induced degradation and phase segregation initiated on the NiOx side under UV-light exposure. The–NH2 and–COO− in the TRP molecule can incorporate with the WBG perovskite by strong hydrogen bonding and chemical interactions to stabilize the crystal structure and establish an anchored interface on NiOx substrate. The optimized charge transport and minimized non-radiative recombination at the interface boost the efficiency up to 19.04% with a VOC of 1.30 V, which is the highest VOC for the NiOx-based WBG PSCs without self-assembled materials (SAMs) monolayer. The unencapsulated devices demonstrate a T80 lifetime of over 800 h in the glove box. Remarkably, the corresponding PO-TSCs achieve a champion efficiency of 24.30% for small-area devices and 22.87% for large-area devices (1.05 cm2), which show negligible hysteresis phenomenon. The unencapsulated PO-TSCs can maintain 80% of the initial efficiency after 500 h UV-light irradiation (365 nm, 10 mW cm−2).