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Organic Bidirectional Phototransistors Based on Diketopyrrolopyrrole and Fullerene

Kahle, Frank-Julian and Hahn, Tobias and Mukhopadhyay, Tushita and Puttaraju, Boregowda and Patil, Satish and Koehler, Anna (2019) Organic Bidirectional Phototransistors Based on Diketopyrrolopyrrole and Fullerene. In: ADVANCED FUNCTIONAL MATERIALS, 29 (21, SI).

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Official URL: https://doi.org/10.1002/adfm.201805684


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.

Item Type: Journal Article
Additional Information: Copy right to this article belongs to WILEY-V C H VERLAG GMBH
Keywords: autoionization; C-60; charge transfer states; logic operations; thin films
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 13 Nov 2019 04:53
Last Modified: 13 Nov 2019 04:53
URI: http://eprints.iisc.ac.in/id/eprint/63911

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