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Programmable polymer light emitting transistors with ferroelectric polarization-enhanced channel current and light emission
TNO, Netherlands; Eindhoven University of Technology, Netherlands.
TNO, Netherlands.
Eindhoven University of Technology, Netherlands.
TNO, Netherlands.
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2012 (English)In: Organic electronics, ISSN 1566-1199, E-ISSN 1878-5530, Vol. 13, no 9, 1742-1749 p.Article in journal (Refereed) Published
Abstract [en]

We present a voltage programmable polymer light emitting field-effect transistor (LEFET), consisting of a green emitting polymer (F8BT), and a ferroelectric polymer, P(VDF-TrFE), as the gate dielectric. We show by both experimental observations and numerical modeling that, when the ferroelectric gate dielectric is polarized in opposite directions at the drain and source sides of the channel, respectively, both electron and hole currents are enhanced, resulting in more charge recombination and similar to 10 times higher light emission in a ferroelectric LEFET, compared to the device with non-ferroelectric gate. As a result of the ferroelectric poling, our ferroelectric LEFETs exhibit repeated programmability in light emission, and an external quantum efficiency (EQE) of up to 1.06%. Numerical modeling reveals that the remnant polarization charge of the ferroelectric layer tends to pin the position of the recombination zone, paving the way to integrate specific optical out-coupling structures in the channel of these devices to further increase the brightness. (C) 2012 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
Elsevier , 2012. Vol. 13, no 9, 1742-1749 p.
Keyword [en]
Ferroelectric polymer; Light-emitting polymer transistor; Programmable light-emission
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-141443DOI: 10.1016/j.orgel.2012.05.021ISI: 000306107200037OAI: oai:DiVA.org:liu-141443DiVA: diva2:1145808
Note

Funding Agencies|European Community of the MOMA project [248092]

Available from: 2017-09-29 Created: 2017-09-29 Last updated: 2017-10-09

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Kemerink, Martijn
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