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@ARTICLE{Biesterfeld:612994,
      author       = {Biesterfeld, Leon and Vochezer, Mattis T. and Kögel, Marco
                      and Zaluzhnyy, Ivan A. and Rosebrock, Marina and Klepzig,
                      Lars F. and Leis, Wolfgang and Seitz, Michael and Meyer,
                      Jannik C. and Lauth, Jannika},
      title        = {{S}olving the {S}ynthetic {R}iddle of {C}olloidal
                      {T}wo-{D}imensional {P}b{T}e {N}anoplatelets with {T}unable
                      {N}ear-{I}nfrared {E}mission},
      journal      = {Chemistry of materials},
      volume       = {36},
      number       = {15},
      issn         = {0897-4756},
      address      = {Washington, DC},
      publisher    = {American Chemical Society},
      reportid     = {PUBDB-2024-05500},
      pages        = {7197-7206},
      year         = {2024},
      abstract     = {Near-infrared emitting colloidal two-dimensional (2D) PbX
                      (X = S, Se) nanoplatelets (NPLs) have emerged as interesting
                      materials with strong size quantization in the thickness
                      dimension. They act as model systems for efficient charge
                      carrier multiplication and hold potential as intriguing
                      candidates for fiber-based photonic quantum applications.
                      However, synthetic access to the third family member, 2D
                      PbTe, remains elusive due to challenging precursor
                      chemistry. Here, we report a direct synthesis for 2D PbTe
                      NPLs with tunable photoluminescence [PL, 910–1460 nm
                      (1.36–0.85 eV), PL quantum yields $1–15\%],$ based on
                      aminophosphine precursor chemistry. Ex situ transamination
                      of tris(dimethylamino)phosphine telluride with octylamine is
                      confirmed by 31P nuclear magnetic resonance and yields a
                      reactive tellurium precursor for the formation of 2D PbTe
                      NPLs at temperatures as low as 0 °C. The PL position of the
                      PbTe NPLs is tunable by controlling the Pb/Te ratio in the
                      reaction. Grazing-incidence wide-angle X-ray scattering
                      confirms the 2D geometry of the NPLs and the formation of
                      superlattices. The importance of a postsynthetic passivation
                      of PbTe NPLs by PbI2 to ensure colloidal stability of the
                      otherwise oxygen-sensitive samples is supported by X-ray
                      photoelectron spectroscopy. Our results expand and complete
                      the row of lead chalcogenide-based 2D NPLs, opening up new
                      ways for further pushing the optical properties of 2D NPLs
                      into the infrared and toward technologically relevant
                      wavelengths.},
      cin          = {DOOR ; HAS-User},
      ddc          = {540},
      cid          = {I:(DE-H253)HAS-User-20120731},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal: I-20220914
                      (I-20220914) / DFG project 448713396 -
                      Röntgenphotoelektronenspektrometer (448713396) / DFG
                      project 390833453 - EXC 2122: PhoenixD: Photonics, Optics,
                      and Engineering – Innovation Across Disciplines
                      (390833453)},
      pid          = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)I-20220914 /
                      G:(GEPRIS)448713396 / G:(GEPRIS)390833453},
      experiment   = {EXP:(DE-H253)P-P03-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001276206500001},
      doi          = {10.1021/acs.chemmater.4c00939},
      url          = {https://bib-pubdb1.desy.de/record/612994},
}