Shingled string technology can be used to maximize the output power of photovoltaic modules. The maximum power (Pmax) of a shingled photovoltaic module can be increased by using a bifacial heterojunction with an intrinsic thin layer (HIT) of cells. To fabricate the shingled strings for a high power module, we first cut 6-inch solar cells by laser scribing while minimizing cutting loss. Unlike standard crystalline silicon (c-Si) solar cells, the structure of bifacial HIT solar cells is weak under thermal effect, so an optimal scribing condition had to be found. After laser scribing processes had been optimized, Pmax was increased by 0.02W for each separated solar cells when we using an ultraviolet (UV) laser compared to the green laser, and a UV cut shingled string of HIT cell was demonstrated for the first time.

中文翻译：

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光伏叠瓦组件的 HIT 电池的激光划片工艺表征

叠瓦串技术可用于最大化光伏组件的输出功率。通过使用带有电池本征薄层 (HIT) 的双面异质结，可以增加叠盖式光伏模块的最大功率 (Pmax)。为了制造大功率模块的叠瓦串，我们首先通过激光划线切割 6 英寸太阳能电池，同时最大限度地减少切割损失。与标准晶体硅 (c-Si) 太阳能电池不同，双面 HIT 太阳能电池的结构在热效应下较弱，因此必须找到最佳的划线条件。在优化激光划线工艺后，与绿色激光相比，当我们使用紫外 (UV) 激光时，每个分离的太阳能电池的 Pmax 增加了 0.02W，并且首次展示了紫外线切割叠瓦式 HIT 电池。