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Efficient and Stable Solution-Processed Organic Light Emitting Transistors using a High-k Dielectric

Nam, Sungho; Chaudhry, Mujeeb Ullah; Tetzner, Kornelius; Pearson, Christopher; Groves, Chris; Petty, Michael C.; Anthopoulos, Thomas D.; Bradley, Donal D.C.

Efficient and Stable Solution-Processed Organic Light Emitting Transistors using a High-k Dielectric Thumbnail


Authors

Sungho Nam

Kornelius Tetzner

Christopher Pearson

Michael C. Petty

Thomas D. Anthopoulos

Donal D.C. Bradley



Abstract

We report the development of highly efficient and stable solution-processed organic light emitting transistors (OLETs) that combine a polymer heterostructure with the transparent high-k dielectric poly(vinylidenefluoride0.62-trifluoroethylene0.31-chlorotrifluoroethylene0.7) (P(VDF-TrFE-CTFE)). The polymer heterostructure comprises of the poly[4-(4,4- dihexadecyl-4H-cyclopenta[1,2-b:5,4-b’]dithiophen-2-yl)-alt-[1,2,5]thiadiazolo[3,4- c]pyridine] (PCDTPT) and Super Yellow as charge transporting and light emitting layers, respectively. Device characterization shows that the use of P(VDF-TrFE-CTFE) leads to larger channel currents (≈2 mA) and lower operating voltages (-35 V) than for previously reported polymer based OLETs. Furthermore, the combined transparency of the dielectric and gate electrode, results in efficient bottom emission with external quantum efficiency of ≈0.88 % at a luminance L ≥ 2000 cd m−2. Importantly, the resulting OLETs exhibit excellent shelf life and operational stability. The present work represents a significant step forward in the pursuit of all-solution-processed OLET technology for lighting and display applications.

Journal Article Type Article
Acceptance Date Nov 12, 2019
Online Publication Date Nov 12, 2019
Publication Date Dec 18, 2019
Deposit Date Nov 13, 2019
Publicly Available Date Nov 12, 2020
Journal ACS Photonics
Electronic ISSN 2330-4022
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 6
Issue 12
Pages 3159-3165
DOI https://doi.org/10.1021/acsphotonics.9b01265
Public URL https://durham-repository.worktribe.com/output/1277686

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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsphotonics.9b01265






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