Tuning the photoresponse in organic field-effect transistors

Mirella El Gemayel; Matthias Treier; Chiara Musumeci; Chen Li; Klaus Müllen; Paolo Samorì

doi:10.1021/ja211515b

Tuning the photoresponse in organic field-effect transistors

J Am Chem Soc. 2012 Feb 1;134(4):2429-33. doi: 10.1021/ja211515b. Epub 2012 Jan 20.

Authors

Mirella El Gemayel¹, Matthias Treier, Chiara Musumeci, Chen Li, Klaus Müllen, Paolo Samorì

Affiliation

¹ Nanochemistry Laboratory, ISIS-CNRS 7006, Université de Strasbourg, 8 allée Gaspard Monge, 67000 Strasbourg, France.

PMID: 22225499
DOI: 10.1021/ja211515b

Abstract

We report on the fabrication of solution-processed organic phototransistors (OPTs) based on perylenebis(dicarboximide)s (PDIs). We found that the responsivity to the photoillumination depends on the transistor's channel length and that it can be tuned by varying the device geometry. The analysis of different morphologies of the active semiconducting layer revealed that single PDI fibers exhibit the higher photoresponse when compared to more poorly organized films. The highest responsivity value of 4.08 ± 1.65 × 10(5) A/W was achieved on a multifiber-based OPT. These findings represent a step forward toward the use of organic based phototransistors as photosensors.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Light
Molecular Structure
Perylene / analogs & derivatives
Perylene / chemistry*
Phototrophic Processes
Transistors, Electronic*

Substances

Perylene