Electron injection and defect passivation for high-efficiency mesoporous perovskite solar cells.
Science
; 383(6688): 1198-1204, 2024 Mar 15.
Article
en En
| MEDLINE
| ID: mdl-38484055
ABSTRACT
Printable mesoscopic perovskite solar cells (p-MPSCs) do not require the added hole-transport layer needed in traditional p-n junctions but have also exhibited lower power conversion efficiencies of about 19%. We performed device simulation and carrier dynamics analysis to design a p-MPSC with mesoporous layers of semiconducting titanium dioxide, insulating zirconium dioxide, and conducting carbon infiltrated with perovskite that enabled three-dimensional injection of photoexcited electrons into titanium dioxide for collection at a transparent conductor layer. Holes underwent long-distance diffusion toward the carbon back electrode, and this carrier separation reduced recombination at the back contact. Nonradiative recombination at the bulk titanium dioxide/perovskite interface was reduced by ammonium phosphate modification. The resulting p-MPSCs achieved a power conversion efficiency of 22.2% and maintained 97% of their initial efficiency after 750 hours of maximum power point tracking at 55 ± 5°C.
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Science
Año:
2024
Tipo del documento:
Article
Pais de publicación:
Estados Unidos