Abstract The utilization of boron-doped Si solar cells based on the structure of a passivated emitter and rear cell (PERC) in the solar industry has increased recently. However, this type of high efficiency solar cell is exposed to a so-called light and elevated temperature induced degradation (LeTID). A suppressing of mc-Si LeTID has been studied through a regeneration treatment at high temperature under illumination or in the dark, but most was about the lifetime samples. In this work, to evaluate the applicability of regeneration and annealing at industrial relevant conditions, industrially made B–Ga co-doped cast-mono Si PERC solar cells were treated in a light soaking tool in which the intensity of light and substrate temperature could be adjusted separately and a rapid thermal process (RTP) system. This treatment was evaluated during a subsequent intentional degradation under conditions of 75 °C with an LED white light source at an intensity of 1 kW/m2. The results showed that properly regenerated samples by high intensity illumination at elevated temperatures suffered from the least degradation, while untreated solar cells had most severe degradation. The RTP method could improve the performance of the solar cells but the RTP-treated samples were less stable than the regenerated samples. It demonstrates the application of a fast (around 20 min) regeneration method could be coupled in mass production. Further, RTP treatment combining with an accelerated regeneration step may be a potential method to provide both the improved performance and high anti-LeTID properties in Si PERC solar cells.

中文翻译：

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B-Ga共掺杂铸造单晶硅PERC太阳能电池的光和高温诱导降解

摘要 近年来，基于钝化发射极和背面电池 (PERC) 结构的掺硼硅太阳能电池在太阳能行业中的应用有所增加。然而，这种类型的高效太阳能电池会暴露于所谓的光和高温诱导退化 (LeTID)。已经通过在高温下在光照或黑暗中的再生处理研究了对 mc-Si LeTID 的抑制，但大多数是关于寿命样品。在这项工作中，为了评估在工业相关条件下再生和退火的适用性，工业制造的 B-Ga 共掺杂铸造单晶硅 PERC 太阳能电池在光浸泡工具中进行处理，其中光强度和基板温度可以单独调整和快速热处理 (RTP) 系统。在 75 °C 的条件下，使用强度为 1 kW/m2 的 LED 白光光源，在随后的有意降解过程中对该处理进行了评估。结果表明，在高温下通过高强度照射适当再生的样品退化最少，而未经处理的太阳能电池退化最严重。RTP 方法可以提高太阳能电池的性能，但 RTP 处理的样品不如再生样品稳定。它证明了快速（大约 20 分钟）再生方法的应用可以在批量生产中结合使用。此外，RTP 处理与加速再生步骤相结合可能是在 Si PERC 太阳能电池中提供改进的性能和高抗 LeTID 特性的潜在方法。