کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7939786 1513190 2017 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of gate width on gate-channel carrier mobility in AlGaN/GaN heterostructure field-effect transistors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Influence of gate width on gate-channel carrier mobility in AlGaN/GaN heterostructure field-effect transistors
چکیده انگلیسی
For the fabricated AlGaN/GaN heterostructure field-effect transistors (HFETs) with different gate widths, the gate-channel carrier mobility is experimentally obtained from the measured current-voltage and capacitance-voltage curves. Under each gate voltage, the mobility gets lower with gate width increasing. Analysis shows that the phenomenon results from the polarization Coulomb field (PCF) scattering, which originates from the irregularly distributed polarization charges at the AlGaN/GaN interface. The device with a larger gate width is with a larger PCF scattering potential and a stronger PCF scattering intensity. As a function of gate width, PCF scattering potential shows a same trend with the mobility variation. And the theoretically calculated mobility values fits well with the experimentally obtained values. Varying gate widths will be a new perspective for the improvement of device characteristics by modulating the gate-channel carrier mobility.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Superlattices and Microstructures - Volume 111, November 2017, Pages 65-72
نویسندگان
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