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Full capacitance model, considering the specifics of amorphous oxide semiconductor thin film transistors structures
摘要： A full capacitance model for Amorphous Oxide Semiconductor Thin Film Transistors (AOSTFTs), considering the effect of the drain contact overlap in bottom gate passivated structures is presented. It is shown that this drain overlap, on top of the passivation layer, serves as a second gate with an applied voltage equal to VDS. When VDS>VT the semiconductor-passivation (S-P) interface will be in accumulation and the behavior of the different capacitance is affected. An expression to represent this effect is included in the present model. The overlap capacitance between gate and drain/source, as well as the effect of reducing the channel capacitance as the drain is increased, are also considered by the model. The calculated capacitance is a function of the threshold voltage, (VT), the mobility and saturation parameters (γα,αs), and the sharpness of the knee region m, which are extracted using the Unified Model and Extraction Method (UMEM) for AOSTFTs. Results are compared with simulated and experimental data.
关键词： AOSTFT modeling,Capacitance model,Dynamic modeling
更新于2025-11-14 17:28:48
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[IEEE 2019 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM) - Hong Kong, China (2019.7.8-2019.7.12)] 2019 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM) - Design and Optimization of a Wave Driven Solar Tracker for Floating Photovoltaic Plants <sup>*</sup>
摘要： With advances in the ocean exploration, Floating Photovoltaic (FPV) system becomes appealing with the advantages of less valuable land use and higher efficiency. In current development, the PV module of the system is either fixed at an angle or actuated by motor to adjust the angle for solar tracking. In this paper, a novel Tracking-type FPV (TFPV) system is proposed and analysed. Rather than using motor as the actuation method, the proposed system utilized the natural wave energy to adjust the angle of the PV module for solar tracking. With this design, a floating PV plant can be built with reduced total cost and increased energy harvesting efficiency. The novel solar tracking design concept and a corresponding control strategy were firstly presented. Based on its dynamic modeling, the design of the system was analysed and optimized in the aspect of the structure scheme, panel size, and the adjustment frequency. A prototype was built to verify the control strategy on a 3D motion platform to simulate the wave and wind effects.
关键词： Wave Energy,Control Strategy,Solar Tracker,Dynamic Modeling,Floating Photovoltaic
更新于2025-09-11 14:15:04