Scientists on the College of Surrey have constructed a brand new type of photo voltaic panel with two faces, using versatile perovskite panels with electrodes made from carbon nanotubes. These can generate extra energy with larger effectivity and at a price 70% decrease than current photo voltaic panels, says the group. Dr Jing Zhang, analysis

Optical characterizations of semi-devices. a Regular-state PL of semi-devices with numerous SWCNT movies. b Corresponding TRPL curves of semi-devices with SWCNT movies in several thicknesses. c Cost lifetime statics of areas with and with out SWCNTs (the fluence energy is 0.4 µJ cm−2), and the inset footage are cost lifetime mapping of areas with and with out