Performance estimation of a V-shape perovskite-silicon tandem device composed of a bifacial heterojunction silicon cell

Coupling perovskite solar cells (PSCs) and silicon solar cells (SSCs) in a V-shape tandem configuration is a promising strategy for efficient solar energy splitting utilization that requires no beam splitter mirror and only half usage amount of SSCs. Here we develop a method for the performance estimation of a V-shape tandem device, which employs a 23%-efficient practical heterojunction SSC as a sub-cell for demonstration. The investigation results of influences of PSCs’ bandgap, layer thicknesses and transparent electrode materials on the tandem performance provide a guidance in selecting and optimizing of PSCs for getting most energy output. The tungsten-doped indium oxide is proved to be the suitable material for PSCs in V-shape devices.