Fig. 6. Composition and performance of switchable photovoltaic window devices. (a) Schematic of PV window device architecture and switching process. (b) Transmittance of PV devices in the bleached (red) and colored (blue) states as a function of wavelength. (c) Current density as a function of voltage of the champion switchable PV device in the dark (dashed) and under illumination (solid). The inset table shows PV performance metrics of the device before being bleached. (d) Short-circuit current as a function of time for 20 cycles of 3 min of illumination followed by 5 min of cooling in the dark. (e) Short-circuit current as a function of time for the first illumination cycle. The optical images show the transition from bleached to colored and back to bleached at the indicated times during the cycling process. Reproduced with permission from ref. 50. Copyright 2017 Springer Nature.