کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1264578 972153 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Programmable polymer light emitting transistors with ferroelectric polarization-enhanced channel current and light emission
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Programmable polymer light emitting transistors with ferroelectric polarization-enhanced channel current and light emission
چکیده انگلیسی

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 ∼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.

Figure optionsDownload as PowerPoint slideHighlights
► A light-emitting polymer is combined with a ferroelectric polymer in a transistor.
► A voltage re-programmable light emitting thin-film transistor is realized.
► Ferroelectric polarization increases the charge carrier density in the channel.
► Ferroelectric polarization increases the light emission.
► External quantum efficiency of 1.06% has been calculated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Organic Electronics - Volume 13, Issue 9, September 2012, Pages 1742–1749
نویسندگان
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