Year: 2025
Type: article
Abstract: Most high-efficiency all-perovskite tandem solar cells use a “superstrate” configuration, integrating a wide-bandgap (WBG) top subcell and a narrow bandgap (NBG) bottom subcell. However, this structure suffers oxidative degradation due to easily air-exposable bottom NBG subcells. A “substrate” structure offers improved stability for tandems by encapsulating the NBG top subcell with the air-stable WBG bottom subcell. However, conventional WBG perovskite solar cells (PSCs) using water-based NiO x interlayers hinder their fabrication on top of the NBG subcells in an inert atmosphere. To overcome this, we developed a nonaqueous NiO x nanoparticle dispersion, enabling interlayer fabrication inside a glove box. The blade-coated NiO x interlayer facilitated the formation of a densely packed 2PACz (2-(9 H -carbazol-9-yl)ethyl]phosphonic acid) monolayer hole transporting layer (HTL). The energetically aligned 2PACz molecules reduced minority carrier recombination at the NiO x /perovskite interface. As a result, the fully scalable 1.77 eV WBG PSCs employing a NiO x /2PACz hybrid HTL delivered a champion power conversion efficiency of 17.4%.
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, European Commission, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Eidgenössische Materialprüfungs- und Forschungsanstalt, HORIZON EUROPE Framework Programme, Bundesamt für Energie, Staatssekretariat für Bildung, Forschung und Innovation, HORIZON EUROPE Climate, Energy and Mobility
Awards: G146862182, Sustainable materials and manufacturing processes for the development of high efficiency, flexible, all-Perovskite Tandem photovoltaic modules with low CO2 footprint, G307750175, Substrate Configuration All-Perovskite Monolithic Tandem Solar Cells on Flexible and Textured Substrates with both Extremely High Stability and Efficiency, G4964879541, G5768931455, G6155997666, G7080327354, Sustainable materials and manufacturing processes for the development of high efficiency, flexible, all-Perovskite Tandem photovoltaic modules with low CO2 footprint, G8889590737
OpenAlex ID: W4409305307