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Electrical Loss Reduction in Crystalline Silicon Photovoltaic Module Assembly: A Review
Sanchari Chowdhury,Mallem Kumar,Minkyu Ju,Youngkuk Kim,Chang-Soon Han,Jinshu Park,Jaimin Kim,Young Hyun Cho,Eun-Chel Cho,Junsin Yi 한국태양광발전학회 2019 Current Photovoltaic Research Vol.7 No.4
The output power of a crystalline silicon (c-Si) photovoltaic (PV) module is not directly the sum of the powers of its unit cells. There are several losses and gain mechanisms that reduce the total output power when solar cells are encapsulated into solar modules. Theses factors are getting high attention as the high cell efficiency achievement become more complex and expensive. More research works are involved to minimize the “cell-to-module” (CTM) loss. Our paper is aimed to focus on electrical losses due to interconnection and mismatch loss at PV modules. Research study shows that among all reasons of PV module failure 40.7% fails at interconnection. The mismatch loss in modern PV modules is very low (nearly 0.1%) but still lacks in the approach that determines all the contributing factors in mismatch loss. This review paper is related to study of interconnection loss technologies and key factors contributing to mismatch loss during module fabrication. Also, the improved interconnection technologies, understanding the approaches to mitigate the mismatch loss factors are precisely described here. This research study will give the approach of mitigating the loss and enable improvement in reliability of PV modules.
Development of High-Current Sheet Beam Cathodes for Terahertz Sources
Lili Li,Yiman Wang,Wei Liu,Yanchun Wang,Jinshu Wang,Srivastava, A.,Jin-Kyu So,Gun-Sik Park IEEE 2009 IEEE transactions on electron devices Vol.56 No.5
<P>Generation of a sheet beam directly from a scandia-doped dispenser cathode has been investigated and optimized by means of beam-profile simulations and measurements. Rectangular beams 600 mum wide and 100 mum thick with current densities over 50 A/cm<SUP>2</SUP> have been generated. The beams are stable for at least several hundred hours with the cathodes operating at 950degC<SUB>b</SUB>, making them promising candidates for application in the next generation of terahertz vacuum electron devices such as a 0.5-THz superradiant Smith-Purcell radiation source.</P>