Details

Autor(en) / Beteiligte

• Turkevych, Ivan
• Kazaoui, Said
• Belich, Nikolai A.
• Grishko, Aleksei Y.
• Fateev, Sergey A.
• Petrov, Andrey A.
• Urano, Toshiyuki
• Aramaki, Shinji
• Kosar, Sonya
• Kondo, Michio
• Goodilin, Eugene A.
• Graetzel, Michael
• Tarasov, Alexey B.

Titel

Strategic advantages of reactive polyiodide melts for scalable perovskite photovoltaics

Ist Teil von

• Nature nanotechnology, 2019-01, Vol.14 (1), p.57-63

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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 CH 3 NH 3 I (MAI) or mixed CsI/MAI/NH 2 CHNH 2 I (FAI), subsequently exposed to iodine vapour. The instantly formed MAI 3(L) or Cs(MA,FA)I 3(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 MAPbI 3 perovskite films, such as 100 cm 2 on glass/fluorine-doped tin oxide (FTO) and 600 cm 2 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 MAPbI 3 ), 17.18% (mesoscopic MAPbI 3 ) and 16.89% (planar Cs 0.05 MA 0.2 FA 0.75 PbI 3 ) in the standard FTO/c(m)-TiO 2 /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.