KIP publications

year 2020
author(s) Valentina Rohnacher, Frank S. Benneckendorf, Maybritt Münch, Eric Sauter, Andika Asyuda, Marc-Michael Barf, Jean-Nicolas Tisserant, Sabina Hillebrandt, Frank Rominger, Daniel Jänsch, Jan Freudenberg, Wolfgang Kowalsky, Wolfram Jaegermann, Uwe H. F. Bunz, Annemarie Pucci, Michael Zharnikov, Klaus Müllen
title Functionalized Tetrapodal Diazatriptycenes for Electrostatic Dipole Engineering in n-Type Organic Thin Film Transistors
KIP-Nummer HD-KIP 20-50
KIP-Gruppe(n) F6
document type Paper
Keywords organic field-effect transistors, self-assembled monolayers, tetrapods, triptycenes, work function
source Advanced Materials Technologies 2020
doi 10.1002/admt.202000300
Abstract (en)

Abstract A diazatriptycene-based tetrapodal scaffold with thiol anchors enforces a nearly upright orientation of functional groups, introduced to its quinoxaline subunit, with respect to the substrate upon formation of self-assembled monolayers (SAMs). Substitution with electron-withdrawing fluorine and cyano as well as electron-rich dimethylamino substituents allows tuning of the molecular dipole and, consequently, of the work function of gold over a range of 1.0 eV (from 3.9 to 4.9 eV). The properties of the SAMs are comprehensively investigated by infrared reflection absorption spectroscopy, near edge X-ray absorption fine structure spectroscopy, and X-ray photoelectron spectroscopy. As prototypical examples for the high potential of the presented SAMs in devices, organic thin-film transistors are fabricated.

  author   = {Rohnacher, Valentina and Benneckendorf, Frank S. and M\"unch, Maybritt and Sauter, Eric and Asyuda, Andika and Barf, Marc-Michael and Tisserant, Jean-Nicolas and Hillebrandt, Sabina and Rominger, Frank and J\"ansch, Daniel and Freudenberg, Jan and Kowalsky, Wolfgang and Jaegermann, Wolfram and Bunz, Uwe H. F. and Pucci, Annemarie and Zharnikov, Michael and M\"ullen, Klaus},
  title    = {Functionalized Tetrapodal Diazatriptycenes for Electrostatic Dipole Engineering in n-Type Organic Thin Film Transistors},
  journal  = {Advanced Materials Technologies},
  year     = {2020},
  volume   = {n/a},
  number   = {n/a},
  pages    = {2000300},
  doi      = {10.1002/admt.202000300},
  url      = {}
URL doi:10.1002/admt.202000300
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