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Solar Cell Using Hourglass-Shaped Silicon Nanowires for Increased Light-Trapping Path
摘要： Silicon nanowires (SiNWs) are promising structures with excellent photovoltaic properties for low-cost, high-efficiency solar cells and have the potential to overcome the limits of bulk silicon solar cells. There is still a need to enhance light absorption in SiNWs without increasing the surface area. Here, we introduce a novel design, hourglass-shaped silicon nanowire (HG-SiNW) to significantly increase the light-trapping path. Electrical and optical measurements show the superiority of HG-SiNW as an antireflective layer. In addition, whispering gallery mode identified by optical simulations accounts for the greatly improved absorption at the broadband solar spectrum. The HG-SiNW solar cells show an increase in short-circuit current (JSC) and 1.85 times higher efficiency with only simple diameter variations.
关键词： light absorption,Antireflection,silicon (Si) nanostructures,photovoltaics (PVs),whispering gallery mode (WGM)
更新于2025-09-16 10:30:52
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An Erbium-Doped Fiber Whispering-Gallery-Mode Microcavity Laser
摘要： A kind of whispering-gallery-mode (WGM) micro-cavities has been fabricated by melting a corroded erbium-doped fiber with a fiber-fusion splicer. The quality factor (Q) value of the microcavity can reach as high as 3×107. The microcavity is pumped by a wavelength-tunable laser source, and due to the high-Q characteristics, the laser threshold can be as low as 21.2 μW in a 60-μm-diameter microsphere-like cavity. By tuning the frequency of the pump laser at 1485 nm with 19.6 GHz, we can tune the WGM microcavity laser by 17.3 GHz around 1578.25 nm.
关键词： Erbium,whispering gallery mode (WGM),microcavity,microlaser
更新于2025-09-12 10:27:22