کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1264573 972153 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Light-emitting field-effect transistors with π-conjugated liquid crystalline polymer driven by AC-gate voltages
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Light-emitting field-effect transistors with π-conjugated liquid crystalline polymer driven by AC-gate voltages
چکیده انگلیسی

Light-emitting field-effect transistors with a liquid crystalline polymer of poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-bithiophene] (F8T2) were investigated under alternating current (AC) gate operations. Bottom-contact/top-gate devices were fabricated with indium-tin-oxide (ITO) source/drain electrodes, a poly(methyl methacrylate) dielectric and a gold gate electrode. The crystalline F8T2 film exhibited ambipolar characteristics with electron and hole mobilities of 1.8 × 10−3 and 2.5 × 10−3 cm2/V s, respectively, although the threshold voltage was considerably higher for electron injection. By applying square-wave voltages to the gate, light emission was obtained at the both edges of the source and drain electrodes by alternating injection of opposite carriers even when the source and drain were grounded. The light intensity was enhanced in the channel region by biasing the source negative while biasing the drain positive where the holes injected from the drain were transported to recombine with the electrons injected at the source edge.

Figure optionsDownload as PowerPoint slideHighlights
► Organic field-effect transistors were fabricated with a liquid crystalline polymer.
► Ambipolar characteristics were obtained with the bottom-contact/top-gate structure.
► Light emission was observed from the device under AC-gate operations.
► Alternate carrier injections occurred at the source and drain electrode edges.
► Time responses of light emission were explained by the recombination mechanism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Organic Electronics - Volume 13, Issue 9, September 2012, Pages 1710–1715
نویسندگان
, , ,