Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 29, Issue 21, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201805684
Keywords
autoionization; C-60; charge transfer states; logic operations; thin films
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Funding
- German Science Foundation (DFG) through the doctoral training center Photophysics of Synthetic and Biological Multichromophoric Systems [GRK1640]
- Bavarian State Ministry of Education, Science and the Arts through the Collaborative Research Network Solar Technologies go Hybrid (SolTech)
- EU-Marie-Skodowska-Curie-ITN Network INFORM
- Department of Science and Technology, India
- Elite Network Bavaria (ENB) in the Elite Study Program Macromolecular Science
- IISc
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It is shown that simple bilayer devices consisting of the diketopyrrolopyrrole (DPP) monomer Ph-TDPP-Ph as donor and C-60 as acceptor feature J-V-characteristics of a bidirectional organic phototransistor where illumination intensity plays the role of the gate voltage as compared to a conventional field-effect transistor. The output current may therefore be controlled both electrically and optically. The underlying mechanism is based on the good charge transport in Ph-TDPP-Ph and C-60, the intrinsic dissociation properties of C-60, and the presence of an injection barrier for holes. In addition to this, it is demonstrated that the observed behavior of the DPP/C-60 system allows the realization of basic logic elements like NOT-, AND-, and OR-Gates, which may provide the basis for advanced analog and digital applications.
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