In this work, the use of a high bandgap perovskite solar cell in a spectrum splitting system is demonstrated. A remarkable energy conversion efficiency of 23.4% is achieved when a CH 3 NH 3 PbBr 3 solar cell is coupled with a 22.7% efficient silicon passivated emitter rear locally diffused solar cell. Relative enhancements of >10% are demonstrated by CH 3 NH 3 PbBr 3 /CH 3 NH 3 PbI 3 and CH 3 NH 3 PbBr 3 /multicrystalline-screen-printed-Si spectral splitting systems with tandem efficiencies of 13.4% and 18.8%, respectively. The former is the first demonstration of an all perovskite split spectrum system. The CH 3 NH 3 PbBr 3 cell on a mesoporous structure was fabricated by the vapor-assisted method while the planar CH 3 NH 3 PbI 3 cell was fabricated by the gas-assisted method. This work demonstrates the advantage of the higher voltage output from the high bandgap CH 3 NH 3 PbBr 3 cell and its suitability in a tandem system.