Design And Analysis Of Electronic Devices With Device/circuit Mix-ED Mode Simulations

For design and analysis of electronic devices, it is required to understand the influence of device parameters on the device performance, and related physical mechanisms for device optimization. In the meantime, it is also important to be able to rapidly and accurately predict the influence of the device parameters on the circuits or systems which the device is integrated into, thus to achieve more effective device-level optimization and verification for practical applications. To meet the aforementioned demands, the simulation method can greatly reduce the cost, shorten the required time and improve the efficiency. For device-level simulations, numerical simulations based on physical models can be used to simulate the electrical behaviors. At the circuit-level, the compact device models are used in the circuit simulators (e.g. SPICE) to predict the device electrical behaviors in the circuit environments. However, for devices of new materials, new structures and new physics, it is very time and labor costly to develop accurate compact models for circuit simulations, and in the early stage of device analysis and design, it is vital to be able to rapidly build the relationship between the device parameters and the circuit or system performance. The device/circuit mixed-mode simulation is proposed for this purpose. In the simulation, numerical simulations based physical models are adopted for the key devices, and the simulated electrical behaviors are embedded into the circuit simulation environment to intuitively predict the influence of the device-level parameters on the circuit or system-level performance.This thesis, for the first time, applied the device/circuit mixed mode simulation to design and analysis of two typical electronic devices: capacitive sensor devices for touch screen, and organic diodes for signal rectifying in radio frequency identification tags. For the former, the electrical response of the capacitive sensor devices and related physical mechanisms were investigated by the mixed mode simulations, which was verified by experiments. For the latter, after the work on the fabrication and performance optimization of the conventional vertical structure organic Schottky diodes, the thesis comparatively studied the performance of three different structure diodes, including the vertical Schottky structure, diode connected thin-film transistor structure, and the lateral Schottky structure.The thesis provides guidelines for design and optimization of capacitive sensor devices for touchs creens and organic diodes for signal rectifying, and other hand, proves the merits of using the device/circuit mixed mode simulation for design and analysis of new type electronic devices, which is useful for the development of new device technologies for circuit and system applications...