Halide Perovskite Tandem Solar Cells

Summary

There are several types of tandem solar cells that have been studied in the literature that can be classified according to the number of junctions, their device materials, number of terminals, the number of transparent conducting electrode (TCE) layers, and illumination type. This chapter limits to a two‐junction tandem cell. The perovskites, as pointed out in the Introduction, successfully address two key challenges for single TCE solar cells: achieving efficient high‐bandgap top cells and avoiding processing incompatibilities such as junction deterioration resulting from high‐temperature processes or other processes such as sputtering damage. Of the many challenges related to building efficient perovskite tandem devices, a general one for all device architectures comes with the need to grow a TCE on top of a device already containing a perovskite layer. Depending on the type of bottom device, different charge recombination layers (CRLs) have been used.