It depends on the absorption bands used. One big downside of PV cells is they don't use energy in the blue. Perovskites do absorb blue. So a combo should do

It depends on the absorption bands used. One big downside of PV cells is they don't use energy in the blue. Perovskites do absorb blue. So a combo should do better than either alone. The average intensity of solar energy reaching the top of the atmosphere directly facing the Sun is about 1,360 watts per square meter. You get about 1,000 W per square meter at sea level https://www.solar-electric.com/learning-center/solar-insolation-maps.html/ https://www.solar-electric.com/learning-center/solar-insolat...