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Mg-doped InZnO (MIZO) films were prepared by sol-gel method. The surface of the films was treated by oxygen plasma. Pt was then deposited on O2-treated films to form MIZO/Pt Schottky diode. The I-V properties of this structure were studied under different oxygen plasma treatment conditions. The experimental results show that oxygen plasma treatment can improve the Schottky properties by minimizing...
Well-aligned ZnO nanorods were grown on the p-GaN substrate by a hydrothermal method and n-ZnO nanorods/p-GaN heterojunction LED structures were formed. The electroluminescence (EL) properties of this structure were studied under both forward and reverse bias. The nanorod LED device only has light output under reverse bias. The I-V characteristic results show that the nanosized junction can increase...
In this work, we develop a statistical thermal simulator including the effect of spatial correlation under within-die process variations. This method utilizes the Karhunen-Loeve (KL) expansion to model the physical parameters, and apply the polynomial Chaoses (PCs) and the stochastic Galerkin method to tackle stochastic heat transfer equations. We demonstrate the accuracy and efficiency of our simulator...
Optical properties of LEDs are sensitive to junction temperature. The understanding of system dynamic behavior is quite important in the controller design of LED. From the principle of solid-state lighting, the luminance of LED is induced from two physical mechanisms: energy effect and optoelectronic effect. The system dynamics model of a high- power LED fixture for energy effect is derived and identified...
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