Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 10: Oxides I: Growth and Characterization
O 10.12: Talk
Monday, March 16, 2020, 13:15–13:30, WIL B321
Bulk and Interface Characteristics of NixCu1−xOy - An Alternative Inorganic Hole Transport Material Systems with Widely Tunable Optoelectronic Properties — •Lucas Bodenstein-Dresler1, Adi Kama2, Johannes Frisch1, Claudia Hartmann1, Anat Itzhak2, Regan Wilks1, Gary Hodes2, David Cahen2,3, and Marcus Bär1,4,5 — 1Helmholtz-Zentrum Berlin für Materialien und Energie GmbH — 2Bar-Ilan University — 3Weizmann Institute of Science — 4Friedrich-Alexander-Universität Erlangen-Nürnberg — 5Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy
Halide perovskite (HaP) solar cells have reached efficiencies of over 25% being now primarily limited by the interfaces between the HaPs absorber and the charge carrier transport layers (TL). Especially organic TL employed in standard HaP solar cells, like PEDOT:PSS or Spiro-OMeTAD, are potentially sources of degradation. Alternative inorganic ternary metal oxide (MO) hole TLs (HTL) promise better stability. Furthermore, their optoelectronic properties can be tuned, allowing for deliberate HaPs/HTL interface tailoring. One possible HTL MO is NixCu1−xOy, which we studied as a combinatorial NiO - Cu2O 72 x 72 m2 material library produced by pulsed laser deposition by photoelectron spectroscopy (XPS) to reveal composition-dependent chemical/electronic surface characteristics. In our presentation, the XPS analysis will be correlated to complementary crystal structure and optical bulk properties, to arrive at a complete picture of the NixCu1−xOy system and allow first steps towards the tailoring of such.