Band gap engineering in blended organic semiconductor films based on dielectric interactions


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{
  "id": "832", 
  "updated": "2021-04-28T08:04:36.236351+00:00", 
  "metadata": {
    "description": "Blending organic molecules to tune their energy levels is currently investigated as an approach to engineer the bulk and interfacial optoelectronic properties of organic semiconductors. It has been proven that the ionization energy (IE) and electron affinity (EA) can be equally shifted in the same direction by electrostatic effects controlled by blending similar halogenated derivatives with different energetics. Here, we show that the energy gap of organic semiconductors can be tuned by blending as well. We use oligothiophenes with different numbers of thiophene rings as example and investigate their structure and electronic properties. Photoelectron spectroscopy and inverse photoelectron spectroscopy show tunability of the single-particle gap, with the optical gaps showing similar, but smaller effects. Theoretical analysis shows that this tuning is mainly caused by a change in the dielectric constant with blend ratio. Further studies will explore the practical impact of this energy-level engineering strategy in optoelectronic devices.", 
    "contributors": [
      {
        "email": "katrin.ortstein@tu-dresden.de", 
        "givennames": "Katrin", 
        "affiliations": [
          "Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany"
        ], 
        "familyname": "Ortstein"
      }, 
      {
        "affiliations": [
          "Center for Advancing Electronics Dresden, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany"
        ], 
        "givennames": "Sebastian", 
        "familyname": "Hutsch"
      }, 
      {
        "affiliations": [
          "Center for Advancing Electronics Dresden, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany", 
          "Faculty of Electrical and Computer Engineering, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany"
        ], 
        "givennames": "Mike", 
        "familyname": "Hambsch"
      }, 
      {
        "affiliations": [
          "Lehrstuhl f\u00fcr Experimentelle Physik IV, Julius-Maximilians-Universit\u00e4t W\u00fcrzburg, Am Hubland, 97074 W\u00fcrzburg, Germany"
        ], 
        "givennames": "Kristofer", 
        "familyname": "Tvingstedt"
      }, 
      {
        "affiliations": [
          "Institut f\u00fcr Physik & IRIS Adlershof, Humboldt-Universit\u00e4t zu Berlin, Brook-Taylor-Stra\u00dfe 6, 12489 Berlin, Germany"
        ], 
        "givennames": "Berthold", 
        "familyname": "Wegner"
      }, 
      {
        "affiliations": [
          "Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany"
        ], 
        "givennames": "Johannes", 
        "familyname": "Benduhn"
      }, 
      {
        "affiliations": [
          "Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany"
        ], 
        "givennames": "Jonas", 
        "familyname": "Kublitski"
      }, 
      {
        "affiliations": [
          "Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany"
        ], 
        "givennames": "Martin", 
        "familyname": "Schwarze"
      }, 
      {
        "affiliations": [
          "Center for Advancing Electronics Dresden, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany"
        ], 
        "givennames": "Sebastian", 
        "familyname": "Schellhammer"
      }, 
      {
        "affiliations": [
          "Center for Advancing Electronics Dresden, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany", 
          "Faculty of Electrical and Computer Engineering, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany"
        ], 
        "givennames": "Felix", 
        "familyname": "Talnack"
      }, 
      {
        "affiliations": [
          "Institut f\u00fcr Organische Chemie II und Neue Materialien, Universit\u00e4t Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany"
        ], 
        "givennames": "Astrid", 
        "familyname": "Vogt"
      }, 
      {
        "affiliations": [
          "Institut f\u00fcr Organische Chemie II und Neue Materialien, Universit\u00e4t Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany"
        ], 
        "givennames": "Peter", 
        "familyname": "B\u00e4uerle"
      }, 
      {
        "affiliations": [
          "Institut f\u00fcr Physik & IRIS Adlershof, Humboldt-Universit\u00e4t zu Berlin, Brook-Taylor-Stra\u00dfe 6, 12489 Berlin, Germany"
        ], 
        "givennames": "Norbert", 
        "familyname": "Koch"
      }, 
      {
        "affiliations": [
          "Center for Advancing Electronics Dresden, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany", 
          "Faculty of Electrical and Computer Engineering, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany"
        ], 
        "givennames": "Stefan C. B.", 
        "familyname": "Mannsfeld"
      }, 
      {
        "affiliations": [
          "Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany"
        ], 
        "givennames": "Hans", 
        "familyname": "Kleemann"
      }, 
      {
        "email": "frank.ortmann@tum.de", 
        "givennames": "Frank", 
        "affiliations": [
          "Center for Advancing Electronics Dresden, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany", 
          "Technische Universit\u00e4t M\u00fcnchen, Department of Chemistry, Lichtenbergstr. 4, 85748 Garching"
        ], 
        "familyname": "Ortmann"
      }, 
      {
        "email": "karl.leo@tu-dresden.de", 
        "givennames": "Karl", 
        "affiliations": [
          "Center for Advancing Electronics Dresden, Technische Universit\u00e4t Dresden, 01062 Dresden, Germany"
        ], 
        "familyname": "Leo"
      }
    ], 
    "title": "Band gap engineering in blended organic semiconductor films based on dielectric interactions", 
    "license_addendum": null, 
    "mcid": "2021.66", 
    "id": "832", 
    "is_last": true, 
    "_oai": {
      "id": "oai:materialscloud.org:832"
    }, 
    "publication_date": "Apr 28, 2021, 10:04:36", 
    "edited_by": 100, 
    "status": "published", 
    "version": 1, 
    "license": "Creative Commons Attribution 4.0 International", 
    "_files": [
      {
        "key": "Data.zip", 
        "size": 19198114, 
        "description": "Data to reproduce the plots of the related publication. Subfolders are named after the figure.", 
        "checksum": "md5:0cd35e6cbf8933ca09f0f3a5fc686c8f"
      }, 
      {
        "key": "README.txt", 
        "size": 6986, 
        "description": "Description of the contents and file format where not obvious.", 
        "checksum": "md5:e6c9630463f6e246da898d82d54c7112"
      }
    ], 
    "owner": 380, 
    "keywords": [
      "energy level tuning", 
      "photoelectron spectroscopy", 
      "dielectric interactions", 
      "theoretical simulations"
    ], 
    "references": [
      {
        "type": "Journal reference", 
        "citation": "K. Ortstein, S. Hutsch, M. Hambsch, et al. Band gap engineering in blended organic semiconductor films based on dielectric interactions. Nature Materials (2021) (submitted)"
      }
    ], 
    "conceptrecid": "831", 
    "doi": "10.24435/materialscloud:g3-cp"
  }, 
  "revision": 5, 
  "created": "2021-04-24T19:30:59.076700+00:00"
}