Fig. 2: Charge transfer and recombination characterization for SnO2 and SnO2/LCE.
From: Wearable perovskite solar cells by aligned liquid crystal elastomers
a PL and time-resolved PL spectra of perovskite films deposited on various substrates. b Schematic illustration of the energy levels. c KPFM images of SnO2 films without (left) and with (right) LCE. d Line profiles taken at the position marked by white arrows in the KPFM images. e I–V curves of devices based on the structure of ITO/ETL/Ag without (left) and with (right) LCE interlayer. The inset shows the selected squares. f I–V curves of the electron-only devices fabricated without (up) and with (down) LCE interlayer. g tDOS in perovskite solar cells with or without LCE interlayer.
