The rapidly growing market of wireless devices for “internet of things” requires autonomous low power energy sources (~ µW power) and indoor photovoltaics (PV) can be the solution of choice because of suitable performance at standard 200 – 1000 lux light intensities produced by artificial light sources such as light-emitting diodes and halogen lamps.

Charge separation in metal halide perovskites is effective even at low light intensities. Perovskite solar cells demonstrate high Voc due to low recombination losses.