Figure 1
From: Single ferroelectric-domain photovoltaic switch based on lateral BiFeO3 cells
(a, b) Schematics of photovoltaic measurements conducted in this study and in-plane piezoresponse force microscope (PFM) images of (110) BFO single domain and (100) BFO multidomains, where the net polarization directions are indicated by red and blue arrows. The in-plane PFM images were obtained after the 90 V poling, as indicated by white arrows. (c, d) The corresponding Iph-V characteristics under global illumination on single-domain (c) and multidomain (d) BFO cells. The derivatives of Iph with respect to V are also plotted. The lower right insets show the variation of the transient current associated with the switching characteristics of each domain. The upper left insets are magnified views of the low E-field region, showing photovoltaic effects.
