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A laser opening technique is employed as the photolithography process to form selective emitter (SE) structures on multi-crystalline silicon (mc-Si) substrates for the large-area (156 × 156 × mm2) solar-cell industry. The best efficiency of 16.35% is obtained with the developed SE structure after a damage removal process with optimisation of heavily and lightly doped dopants, which yields a gain of...
A miniaturised broadside coupled-line coupler is presented. The coupler is fabricated on a six-layered printed circuit board and consists of a 90deg coupled slow-wave artificial transmission line section. Compared with previous works on printed circuit boards, the proposed design features the smallest occupied size. It also demonstrates a comparable operating bandwidth of 85deg. The design concept,...
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