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<p>This study investigates how to improve the stability of liquid electrolyte (LE) dye-sensitized solar cells (DSSCs) by incorporating a titanium-based metal-organic framework (MIL-125). MIL-125, created through the coordination of Ti<sup>4+</sup> ions with benzene-1,4-dicarboxylic acid, forms a structure that can effectively accommodate I<sup>−</sup>/I<sub>3</sub><sup>−</sup> electrolytes, resulting in a MIL-125@electrolyte assembly. This innovative assembly successfully prevents electrolyte leakage while preserving the LE properties. The study examines how the MIL-125@electrolyte enhances both stability and power conversion efficiency (PCE) of DSSCs. The inclusion of the large-surface-area of MIL-125 improves ionic conductivity, reduces charge transfer resistance, and stops leakage. The optimized MIL-125@electrolyte achieves a high PCE of 10.51%, with a peak value of 10.99%, and a notable short-circuit current density of 20.97&#xa0;mA/cm², peaking at 22.27&#xa0;mA/cm², under standard AM 1.5, 100 mW/cm² conditions. It maintains about 75% of its PCE after 1400&#xa0;h at approximately 23&#xa0;°C. For indoor applications using LED lighting, the quasi-solid-state DSSC reaches a record PCE of 27.6%, with an average of 25.9%, under 6000&#xa0;lx illumination.</p>

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Enhancing the stability and efficiency of dye-sensitized solar cells with MIL-125 metal-organic framework as an electrolyte additive

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年2月18日

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  • Ayagoz Ibrayeva,
  • Zulfiya Imanbekova,
  • Urker Abibulla,
  • Yerbolat Tashenov,
  • Bakhytzhan Baptayev,
  • Mannix P. Balanay

摘要

This study investigates how to improve the stability of liquid electrolyte (LE) dye-sensitized solar cells (DSSCs) by incorporating a titanium-based metal-organic framework (MIL-125). MIL-125, created through the coordination of Ti4+ ions with benzene-1,4-dicarboxylic acid, forms a structure that can effectively accommodate I−/I3− electrolytes, resulting in a MIL-125@electrolyte assembly. This innovative assembly successfully prevents electrolyte leakage while preserving the LE properties. The study examines how the MIL-125@electrolyte enhances both stability and power conversion efficiency (PCE) of DSSCs. The inclusion of the large-surface-area of MIL-125 improves ionic conductivity, reduces charge transfer resistance, and stops leakage. The optimized MIL-125@electrolyte achieves a high PCE of 10.51%, with a peak value of 10.99%, and a notable short-circuit current density of 20.97 mA/cm², peaking at 22.27 mA/cm², under standard AM 1.5, 100 mW/cm² conditions. It maintains about 75% of its PCE after 1400 h at approximately 23 °C. For indoor applications using LED lighting, the quasi-solid-state DSSC reaches a record PCE of 27.6%, with an average of 25.9%, under 6000 lx illumination.