This study presents an effective method for recovering unbroken solar cells from photovoltaic (PV) modules. The combustion process is effective at removing ethylene vinyl acetate (EVA) in PV modules. However, the solar cell tends to break during the combustion process. We verify that the breakage mechanisms of the solar cell in the module are related to the thermal changes of EVA during the heat treatment process, that is, generated gases form bubbles behind the glass, and the thermal deformation of the rear EVA applies stress to the solar cell. This study investigates the simple pretreatments of glass cracking and EVA patterning to prevent the breakage behavior. An unbroken solar cell was successfully recovered from the module after complete EVA removal using the combustion process. The recovered solar cell was immersed in a mixed acid solution of HNO₃ and HF to reclaim the crystalline silicon wafer, which subsequently underwent the solar cell manufacturing process. The PV performances of the solar cells based on the reclaimed wafer and a commercial wafer were evaluated and compared. The PV performance of the solar cell manufactured from the reclaimed wafer was measured at 18.5%, whereas that from the commercial wafer‐based solar cell was measured at 18.7%. Consequently, the considered pretreatment processes yielded solar cells acceptable for use in the PV industry.

中文翻译：

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简单的预处理过程可成功回收和再制造晶体硅太阳能电池

这项研究提出了一种从光伏（PV）模块中回收未破损太阳能电池的有效方法。燃烧过程可有效去除PV组件中的乙烯乙酸乙烯酯（EVA）。但是，太阳能电池在燃烧过程中容易破裂。我们验证了模块中太阳能电池的断裂机理与热处理过程中EVA的热变化有关，即所产生的气体在玻璃后面形成气泡，而后EVA的热变形将应力施加到玻璃上。太阳能电池。本研究调查了玻璃破裂和EVA图案化的简单预处理方法，以防止其破裂。使用燃烧过程将EVA完全去除后，可以从模块中成功回收未损坏的太阳能电池。₃和HF回收晶体硅晶片，随后对其进行太阳能电池制造工艺。评价并比较了基于再生晶片和商业晶片的太阳能电池的PV性能。用回收晶片制造的太阳能电池的PV性能测得为18.5％，而使用商业晶片制造的太阳能电池的PV性能测得为18.7％。因此，经过考虑的预处理过程产生了可用于PV工业的太阳能电池。