Dithiocarbamate Self-Assembled Monolayers as Efficient Surface Modifiers for Low Work Function Noble Metals

Adewole Schulz, Dominik Meyer, Tobias Schafer, Sebastian Jung, Julia Rittich, Daniel Mokros, Ingolf Segger, Franziska Maercks, Christian Effertz, Riccardo Mazzarello, Matthias Wuttig

Research output: Contribution to journalArticlepeer-review

11 Scopus Citations


Tuning the work function of the electrode is one of the crucial steps to improve charge extraction in organic electronic devices. Here, we show that N,N-dialkyl dithiocarbamates (DTC) can be effectively employed to produce low work function noble metal electrodes. Work functions between 3.1 and 3.5 eV are observed for all metals investigated (Cu, Ag, and Au). Ultraviolet photoemission spectroscopy (UPS) reveals a maximum decrease in work function by 2.1 eV as compared to the bare metal surface. Electronic structure calculations elucidate how the complex interplay between intrinsic dipoles and dipoles induced by bond formation generates such large work function shifts. Subsequently, we quantify the improvement in contact resistance of organic thin film transistor devices with DTC coated source and drain electrodes. These findings demonstrate that DTC molecules can be employed as universal surface modifiers to produce stable electrodes for electron injection in high performance hybrid organic optoelectronics.
Original languageAmerican English
Pages (from-to)8812-8817
Number of pages6
Issue number35
StatePublished - 2016

NREL Publication Number

  • NREL/JA-5K00-67145


  • dithiocarbamates
  • DTC
  • noble metal electrodes
  • spectroscopy


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