Extending Exciton Diffusion Length via an Organic‐Metal Platinum Complex Additive for High‐Performance Thick‐Film Organic Solar Cells

Abstract The long exciton diffusion length ( L D ) plays an important role in promoting exciton dissociation, suppressing charge recombination, and improving the charge transport process, thereby improving the performance of organic solar cells (OSCs), especially in thick‐film OSCs. However, the limited L D hinders further improvement in device performance as the film thickness increases. Here, an organic‐metal platinum complex, namely TTz‐Pt, is synthesized and served as a solid additive into the D18‐Cl:L8‐BO system. The addition of TTz‐Pt enhanced the crystallinity of blends, reduced energy disorder, and trap density, and decreased non‐radiative recombination and exciton binding energy, which is conducive to…

• NN
  National Natural Science Foundation of China

  Awards: 52103221, 52172048, 22205130
• CP
  China Postdoctoral Science Foundation

  Award: 2023M742063
• NS
  Natural Science Foundation of Shandong Province

  Award: ZR2021QB179,ZR2021QB024,ZR2021ZD06,2023HWYQ‐026
• NK
  National Key Research and Development Program of China

  Award: 2022YFB4200400
• SP
  Shandong Provincial Postdoctoral Science Foundation

  Award: SDCX‐ZG‐202400256
• BA
  Basic and Applied Basic Research Foundation of Guangdong Province

  Awards: 2023A1515010943, 2022A1515110643, 2024A1515010023, 2023A1515012323