Tuning the Photoresponse in Organic Field-Effect Transistors

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 o...

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Bibliographic Details
Published inJournal of the American Chemical Society Vol. 134; no. 4; pp. 2429 - 2433
Main Authors El Gemayel, Mirella, Treier, Matthias, Musumeci, Chiara, Li, Chen, Müllen, Klaus, Samorì, Paolo
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 01.02.2012
Subjects
Light
Molecular Structure
Perylene - analogs & derivatives
Perylene - chemistry
Phototrophic Processes
Transistors, Electronic
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Summary: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 × 105 A/W was achieved on a multifiber-based OPT. These findings represent a step forward toward the use of organic based phototransistors as photosensors.
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ISSN:0002-7863
1520-5126
DOI:10.1021/ja211515b