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@ARTICLE{Wei:305228,
      author       = {K. Wei and D. Nodari and X. Rodríguez-Martínez and L.
                      Tsetseris and A. D. Nega$^*$ and A.
                      Dimitrakopoulou-Strauss$^*$ and M. Rimmele and N. Hastas and
                      Y. Li and F. Eisner and M. Matzapetakis and J. Martin and V.
                      G. Gregoriou and N. Gasparini and C. L. Chochos and J.
                      Panidi},
      title        = {{N}ovel ambipolar polymers for detection beyond 1000 nm
                      with organic phototransistors.},
      journal      = {Materials Horizons},
      volume       = {13},
      number       = {1},
      issn         = {2051-6347},
      address      = {Cambridge},
      publisher    = {RSC Publ.},
      reportid     = {DKFZ-2025-02074},
      pages        = {464–472},
      year         = {2026},
      note         = {Mater. Horiz., 2026, 13, 464–472},
      abstract     = {Organic phototransistors (OPTs) hold significant promise
                      for cost-effective, flexible optoelectronic applications,
                      particularly in Shortwave-Infrared (SWIR) detection, which
                      is crucial for applications such as health monitoring,
                      communications, and artificial vision. Traditional OPTs
                      often rely on unipolar materials, limiting their efficiency
                      by utilizing only one type of charge carrier. In contrast,
                      ambipolar organic semiconductors (OSCs), transporting both
                      electrons and holes, can fully harness photogenerated
                      carriers, thereby enhancing device performance. Here,
                      high-performance, solution-processed ambipolar
                      single-component SWIR OPTs are demonstrated by fine-tuning
                      the number of fused thiophene rings in donor-acceptor (D-A)
                      conjugated polymers utilizing thiadiazoloquinoxaline-unit
                      (TQ) as the electron-deficient unit. Through systematic
                      polymer characterizations and optoelectronic device
                      characterizations it was revealed that three fused thiophene
                      rings (TQ-T3) delivered ambipolar NIR phototransistors with
                      well-balanced hole and electron mobilities of 0.03 and 0.02
                      cm2 V-1 s-1 and the highest reported specific detectivity of
                      2 × 108 Jones (at 1100 nm), with external quantum
                      efficiency of $1400\%$ and $1200\%$ for the p-type and
                      n-type single-component active layer material, respectively.
                      These findings contribute to advancing the design of
                      efficient ambipolar OPTs for SWIR detection, with potential
                      applications in imaging and sensing technologies.},
      cin          = {E060},
      ddc          = {540},
      cid          = {I:(DE-He78)E060-20160331},
      pnm          = {315 - Bildgebung und Radioonkologie (POF4-315)},
      pid          = {G:(DE-HGF)POF4-315},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:41065342},
      doi          = {10.1039/D5MH01486G},
      url          = {https://inrepo02.dkfz.de/record/305228},
}