Synergistic Cosensitization and Redox-Triggered Interfacial Engineering for Efficient and Durable Solar Cells
Achieving long-term stability along with high power conversion efficiency (PCE) remains a critical challenge for dye-sensitized solar cells (DSCs). Herein, we report a synergistic strategy that combines cosensitization and redox-active interfacial engineering to enhance the performance and durabilit...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:dnet:recercat____::6fc3c146893aa2090c0d0dd4dccf95c5 |
| Acceso en línea: | https://hdl.handle.net/2072/489509 https://doi.org/10.1021/acsami.6c01394 |
| Access Level: | acceso abierto |
| Palabra clave: | Química 54 |
| Sumario: | Achieving long-term stability along with high power conversion efficiency (PCE) remains a critical challenge for dye-sensitized solar cells (DSCs). Herein, we report a synergistic strategy that combines cosensitization and redox-active interfacial engineering to enhance the performance and durability of DSC. A narrow-energy-gap sensitizer (H4) is paired with a complementary blue-light-absorbing dye (H15), which possesses a strong absorption at ∼410 nm and a prolonged excited-state lifetime, thereby compensating for the spectral response and reducing interfacial charge recombination in cografted titania films. Simultaneously, we introduce a hypervalent iodine(III) compound, 1-acetoxy-1,2-benziodoxol-3(1H)-one (IBA), into a cobalt-based electrolyte. Initially, the introduction of IBA facilitates fast oxidation of the triphenylamine electron donor in H4, generating free radicals and enhancing intramolecular charge transfer. Importantly, the redox byproduct 2-iodobenzoic acid (IA) plays a critical role in suppressing interfacial recombination and passivation by coordinating with lithium ion and forming halogen-bonded complexes with electrolyte additives. The synergistic effects of cosensitization and the IBA additive in the electrolyte yield a cosensitized DSC with a PCE of 12.84%, featuring excellent operational stability under indoor light soaking for 1000 h. Moreover, the control device achieves an efficiency of 25.81% when tested under indoor light (4500 lx) illumination. |
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