叠层结构是提高硅基薄膜太阳电池效率和稳定性的有效方法，其中子电池的电流匹配是提高叠层电池效率的关键，而中间层技术能有效地改善子电池电流的匹配情况。介绍了非晶硅/微晶硅叠层电池的中间反射层和隧道结的结构、特性及材料种类，结合两者的理论基础提出隧穿反射层的概念，分析其工作原理并给出了薄膜材料的选择原则和范围。隧穿反射层在叠层结构中不仅起到常规中间反射层的作用，解决电池内部的陷光问题，还可优化叠层太阳电池的隧道结，解决子电池对光生载流子的有效收集问题。

Tandem structure is able to improve the efficiency and stability of silicon-based thin film solar cells. The current matching of sub cells that limiting the efficiency of the tandem devices can be effectively improved by employing an interlayer. This paper introduces the structure, properties and materials of the intermediate reflector and tunnel junction in“a-Si∶H/mc-Si∶H”solar cells. Based on the theoretical foundation, the concept of“tunnel recombination reflector”short for the tunnel recombination junction as a light reflector is proposed and its working principle and materials selection are discussed. In the tandem devices, such interlayer not only plays the role of intermediate reflector that enhances light-trapping, but also optimizes the tunnel junction to improve charger carrier collection.