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@ARTICLE{Deo:910219,
      author       = {Deo, Meenal and Möllmann, Alexander and Haddad, Jinane and
                      Ünlü, Feray and Kulkarni, Ashish and Liu, Maning and
                      Tachibana, Yasuhiro and Stadler, Daniel and Bhardwaj, Aman
                      and Ludwig, Tim and Kirchartz, Thomas and Mathur, Sanjay},
      title        = {{T}antalum {O}xide as an {E}fficient {A}lternative
                      {E}lectron {T}ransporting {L}ayer for {P}erovskite {S}olar
                      {C}ells},
      journal      = {Nanomaterials},
      volume       = {12},
      number       = {5},
      issn         = {2079-4991},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2022-03696},
      pages        = {780 -},
      year         = {2022},
      abstract     = {Electron transporting layers facilitating electron
                      extraction and suppressing hole recombination at the cathode
                      are crucial components in any thin-film solar cell geometry,
                      including that of metal–halide perovskite solar cells.
                      Amorphous tantalum oxide (Ta2O5) deposited by spin coating
                      was explored as an electron transport material for
                      perovskite solar cells, achieving power conversion
                      efficiency (PCE) up to $~14\%.$ Ultraviolet photoelectron
                      spectroscopy (UPS) measurements revealed that the extraction
                      of photogenerated electrons is facilitated due to proper
                      alignment of bandgap energies. Steady-state
                      photoluminescence spectroscopy (PL) verified efficient
                      charge transport from perovskite absorber film to thin Ta2O5
                      layer. Our findings suggest that tantalum oxide as an n-type
                      semiconductor with a calculated carrier density of ~7 ×
                      1018/cm3 in amorphous Ta2O5 films, is a potentially
                      competitive candidate for an electron transport material in
                      perovskite solar cells},
      cin          = {IEK-5},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-5-20101013},
      pnm          = {1212 - Materials and Interfaces (POF4-121)},
      pid          = {G:(DE-HGF)POF4-1212},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {35269269},
      UT           = {WOS:000768477000001},
      doi          = {10.3390/nano12050780},
      url          = {https://juser.fz-juelich.de/record/910219},
}