With the rapid increase of photovoltaic (PV) system production and installation, the recycling of end-of-life PV modules has become an important issue. In this paper, the recovery of Si by separating the layers of end-of-life PV modules using KOH-ethanol solution was investigated. Compared with traditional swelling or dissolving reagents (such as benzene and trichloroethylene), KOH-ethanol is a green reagent with low environmental toxicity. The experiments explored the effect of different alkalis, module sizes, temperatures, KOH concentrations, and solid-to-liquid ratios on the separation ratio of the PV modules. The mechanism for separating these layers was also studied. Under optimal conditions, the layers of these PV modules can be completely separated in 3 h, and oxidation of the recovered Si wafer can be controlled. Hence, this method of recycling PV modules is of great significance for environmental protection and resource utilization.

中文翻译：

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通过使用 KOH-乙醇溶液分离不同层的报废光伏组件来回收硅

随着光伏（PV）系统产量和安装量的快速增加，报废光伏组件的回收已成为一个重要问题。在本文中，研究了通过使用 KOH-乙醇溶液分离报废光伏组件层来回收硅。与传统的溶胀或溶解试剂（如苯和三氯乙烯）相比，KOH-乙醇是一种环境毒性低的绿色试剂。实验探讨了不同碱、组件尺寸、温度、KOH 浓度和固液比对 PV 组件分离率的影响。还研究了分离这些层的机制。在最佳条件下，这些光伏组件的层可以在 3 小时内完全分离，并且可以控制回收的硅片的氧化。因此，