Strategic advantages of reactive polyiodide melts for scalable perovskite photovoltaics
| Autor: | Toshiyuki Urano, Sergey A. Fateev, Sonya Kosar, Nikolai A. Belich, Michael Graetzel, Andrey A. Petrov, Ivan Turkevych, Michio Kondo, Shinji Aramaki, Alexey Tarasov, Said Kazaoui, Aleksei Y. Grishko, Eugene A. Goodilin |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
crystallization Biomedical Engineering route Halide Bioengineering fabrication 02 engineering and technology 010402 general chemistry deposition solvent 01 natural sciences Polyiodide chemistry.chemical_compound Photovoltaics gas General Materials Science Electrical and Electronic Engineering Perovskite (structure) business.industry halide perovskite 021001 nanoscience & nanotechnology Condensed Matter Physics Tin oxide Atomic and Molecular Physics and Optics 0104 chemical sciences Indium tin oxide solar-cells Chemical engineering chemistry efficiency films 0210 nano-technology business Layer (electronics) Stoichiometry |
| Zdroj: | Nature Nanotechnology. 14:57-63 |
| ISSN: | 1748-3395 1748-3387 |
| DOI: | 10.1038/s41565-018-0304-y |
| Popis: | Despite tremendous progress in efficiency and stability, perovskite solar cells are still facing the challenge of upscaling. Here we present unique advantages of reactive polyiodide melts for solvent- and adduct-free reactionary fabrication of perovskite films exhibiting excellent quality over large areas. Our method employs a nanoscale layer of metallic Pb coated with stoichiometric amounts of CH3NH3I (MAI) or mixed CsI/MAI/NH2CHNH2I (FAI), subsequently exposed to iodine vapour. The instantly formed MAI3(L) or Cs(MA,FA)I3(L) polyiodide liquid converts the Pb layer into a pure perovskite film without byproducts or unreacted components at nearly room temperature. We demonstrate highly uniform and relatively large area MAPbI3 perovskite films, such as 100 cm2 on glass/fluorine-doped tin oxide (FTO) and 600 cm2 on flexible polyethylene terephthalate (PET)/indium tin oxide (ITO) substrates. As a proof-of-concept, we demonstrate solar cells with reverse scan power conversion efficiencies of 16.12% (planar MAPbI3), 17.18% (mesoscopic MAPbI3) and 16.89% (planar Cs0.05MA0.2FA0.75PbI3) in the standard FTO/c(m)-TiO2/perovskite/spiro-OMeTAD/Au architecture. Reactive polyiodide melt-assisted conversion of metallic lead nanolayers into hybrid lead halide films opens a new branch of scalable technologies for perovskite photovoltaics. |
| Databáze: | OpenAIRE |
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