Fig. 5: Characterization of device performance.
From: Yttrium oxide engineered substrate enables improved durability for perovskite solar cells
a J-V curves of the n-i-p devices. b Stabilized power output (SPO) of the n-i-p devices at the maximum power point (MPP). c EQE spectra of the n-i-p devices. d J-V curves of the tandem devices. e SPO of the tandem devices at the MPP. f EQE spectra of the bottom subcell and top subcell for the tandem devices. g Temporal evolution of PCEs of the unencapsulated devices under MPP tracking at 35 °C in a N2 atmosphere.
