Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Entire DC Network
Device For Detailed Analysis Of Leakage Current Paths In Photovoltaic Modules Under High Voltage Bias, Neelkanth G. Dhere, Narendra S. Shiradkar, Eric Schneller
Device For Detailed Analysis Of Leakage Current Paths In Photovoltaic Modules Under High Voltage Bias, Neelkanth G. Dhere, Narendra S. Shiradkar, Eric Schneller
Faculty Bibliography 2010s
High voltages used in photovoltaic (PV) systems are known to induce long-term power loss in PV modules due to leakage current flowing through the module packaging materials. It has been difficult to identify the specific materials and interfaces responsible for degradation based on an analysis of only the total leakage current. A detailed investigation of the leakage current paths within the PV modules, under high voltage bias, is carried out by utilizing a device that measures the independent contributions of various paths in real-time. Knowledge about dominant leakage current paths can be used to quantify the physical and chemical changes …
A Low Voltage Submillisecond-Response Polymer Network Liquid Crystal Spatial Light Modulator, Jie Sun, Shin-Tson Wu, Yasuhiro Haseba
A Low Voltage Submillisecond-Response Polymer Network Liquid Crystal Spatial Light Modulator, Jie Sun, Shin-Tson Wu, Yasuhiro Haseba
Faculty Bibliography 2010s
We report a low voltage and highly transparent polymer network liquid crystal (PNLC) with submillisecond response time. By employing a large dielectric anisotropy LC host JC-BP07N, we have lowered the V-2 pi voltage to 23 V at lambda = 514 nm. This will enable PNLC to be integrated with a high resolution liquid-crystal-on-silicon spatial light modulator, in which the maximum voltage is 24 V. A simple model correlating PNLC performance with its host LC is proposed and validated experimentally. By optimizing the domain size, we can achieve V-2 pi < 15 V with some compromises in scattering and response time.