Abstract
In this work, we introduce the demonstration of 5 × 5 cm2 mini-modules based on radial junction silicon nanowire (RJ SiNW) devices grown by plasma-assisted vapor-liquid-solid (VLS) technique. The mini-modules are obtained thanks to an industrial laser scribing technique. The electrical parameters have been highlighted to address the performance of these devices and perspectives towards competitive RJ SiNW solar modules. Moreover, electroluminescence (EL) measurements were also conducted to assess the uniformity of the fabricated mini-modules. In addition, the structural characterization of solar cells and laser scribed lines has been assessed by scanning electron microscopy (SEM). The challenges and perspectives are also discussed.
Highlights
Solar cells based on silicon thin film technology have been under development for years to achieve high energy conversion, low material consumption and low fabrication cost[1]
Laser scribing has been employed for different type of solar cells including amorphous silicon (a-Si):H, μc-Si:H11,12 and CIGS13,14 devices, by using various types of lasers[15]
Reactor, H2 plasma was ignited for 2 minutes at RF power of 5 W, the H2 pressure was fixed at 600 mTorr at flow rate of 100 standard cubic centimeters per minute and the substrate temperature was 200 °C
Summary
Mutaz Al-Ghzaiwat 1, Martin Foldyna 1, Takashi Fuyuki[1], Wanghua Chen 1, Erik V. Solar cells based on silicon thin film technology have been under development for years to achieve high energy conversion, low material consumption and low fabrication cost[1]. A promising research field based on radial junction silicon nanowires (RJ SiNWs) provides several advantages over the traditional planar junction solar cells, including high built-in electrical field due to the ultra-thin absorber layer (~100 nm), enhanced light trapping and anti-reflection properties. The last subsection is devoted to the characterization of the device performance and the discussion on week and strong points of presented solar mini-modules.
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