Spiro-Phenothiazine Hole-Transporting Materials: Unlocking Stability and Scalability in Perovskite Solar Cells
Improving both the efficiency and long-term stability of perovskite solar cells (PSCs) is critical for their commercial deployment. Despite the widespread use of spiro-OMeTAD as a hole-transporting material (HTM), its inhomogeneous doping behavior and susceptibility to moisture and heat have hindere...
| Autores: | , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/132954 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/132954 |
| Access Level: | acceso abierto |
| Palabra clave: | 547 Química 2306 Química Orgánica |
| Sumario: | Improving both the efficiency and long-term stability of perovskite solar cells (PSCs) is critical for their commercial deployment. Despite the widespread use of spiro-OMeTAD as a hole-transporting material (HTM), its inhomogeneous doping behavior and susceptibility to moisture and heat have hindered its large-scale industrial implementation. Here, a family of spiro-phenothiazine-based HTMs (PTZ) is reported to address these drawbacks. Among them, the fluorene derivative (PTZ-Fl) shows a larger Li+ affinity and forms a compact interphase by intercalation in the perovskite passivating layer that prevents Li+ migration. PSCs incorporating PTZ-Fl exhibit power conversion efficiencies (PCEs) up to 25.8% (certified 25.2% under reverse scan), retaining 80% of their initial performance after 1000 h under ISOS-L-3 protocol. Furthermore, a 5 × 5 cm mini-module reaches a PCE of 22.1%, surpassing spiro-OMeTAD-based PSCs and retaining over 85% of its efficiency after 1100 h under ISOS-D-1 protocol. These results demonstrate that PTZ-Fl not only enables high PCEs but also substantially improves operational stability, offering a promising pathway toward the large-scale deployment of next-generation PSCs |
|---|