A Förster resonance energy transfer enabled photo-rechargeable battery with an energetically misaligned Cu-porphyrin dye/Cu:V2O5 photocathode

A photo-rechargeable Zn 2+ ion battery enabled by Förster resonance energy transfer from Cu:V 2 O 5 to Cu-porphyrin dye is photocharged to 1.4 V and delivers a photo-charging capacity of 91 mA h g −1 without the application of any voltage or current.