Heteroatom Effect on Star-Shaped Hole-Transporting Materials for Perovskite Solar Cells
Three new star-shaped hole-transporting materials (HTMs) incorporatingbenzotripyrrole, benzotrifuran, and benzotriselenophene central cores endowedwith three-armed triphenylamine moieties (BTP-1, BTF-1, and BTSe-1, respec-tively) are designed, synthesized, and implemented in perovskite solar cells(P...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/108439 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/108439 |
| Access Level: | acceso abierto |
| Palabra clave: | 547 Benzotriselenophene Heteroatom effect Hole transporting materials Perovskite, solar cells Química orgánica (Química) 2306 Química Orgánica |
| Sumario: | Three new star-shaped hole-transporting materials (HTMs) incorporatingbenzotripyrrole, benzotrifuran, and benzotriselenophene central cores endowedwith three-armed triphenylamine moieties (BTP-1, BTF-1, and BTSe-1, respec-tively) are designed, synthesized, and implemented in perovskite solar cells(PSCs). The impact that the heteroatom-containing central scaffold has on theelectrochemical and photophysical properties, as well as on the photovoltaicperformance, is systematically investigated and compared with their sulfur-richanalogue (BTT-3). The new HTMs exhibit suitable highest-occupied molecularorbitals (HOMO) levels regarding the valence band of the perovskite, whichensure efficient hole extraction at the perovskite/HTM interface. The molecularstructures of BTF-1, BTT-3, and BTSe-1 are fully elucidated by single-crystal X-raycrystallography as toluene solvates. The optimized (FAPbI3)0.85(MAPbBr3)0.15-based perovskite solar cells employing the tailor-made, chalcogenide-basedHTMs exhibit remarkable power conversion efficiencies up to 18.5%, which arecomparable to the devices based on the benchmark spiro-OMeTAD. PSCs withBTP-1 exhibit a more limited power conversion efficiency of 15.5%, with notice-able hysteresis. This systematic study indicates that chalcogenide-based deriva-tives are promising HTM candidates to compete efficiently with spiro-OMeTAD. |
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