This work presents a new type of transparent conductive adhesive and its electrical and optical properties with regards to an application in III-V on Silicon tandem solar cells. The developed adhesive is based on a doped ZnO and deposited by spray coating. The optical interconnection of the two sub-cells is identified as one of the major challenges due to the reflectance at the bond and possible approaches to reduce the reflectance are investigated by optical simulations. Regarding the electrical interconnection, an ITO-based contact layer reduced the lowest measured connecting resistivity from previously 17 Ω·cm2 [1] down to 0.12 Ω·cm2. It is shown that the homogeneity of the bond correlates with its conductivity and can be improved by adjusting the glueing process according to the calcination process of the adhesive. Taking both the electrical and optical parameters of the transparent conductive adhesive into account, the efficiency of a triple junction solar cell was estimated.

中文翻译：

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使用 ZnO 基透明导电粘合剂实现 III 型硅串联太阳能电池的途径和潜力


这项工作介绍了一种新型透明导电粘合剂及其在 III-V 族硅串联太阳能电池中的应用的电学和光学特性。开发的粘合剂基于掺杂氧化锌并通过喷涂沉积。由于键合处的反射率，两个子电池的光学互连被认为是主要挑战之一，并且通过光学模拟研究了降低反射率的可能方法。在电气互连方面，基于 ITO 的接触层将测得的最低连接电阻率从之前的 17 Ω·cm2 [1] 降至 0.12 Ω·cm2。结果表明，粘合的均匀性与其导电性相关，并且可以通过根据粘合剂的煅烧工艺调整粘合工艺来提高粘合的均匀性。考虑到透明导电粘合剂的电学和光学参数，估算了三结太阳能电池的效率。