Contact Geometry and Pathway Determined Carriers Transport through Microscale Perovskite Crystals

With the miniaturization of crystals-based photoelectric devices, electrode contact-geometries may play a critical role in determining device performance. However, investigation contact geometries situ faces great challenges due to geometry is typically unmodifiable. To this end, kind liquid metal employed as an adaptive-deformable study carrier transport through perovskite microcrystals, which contacts geometries/positions and thus carrier-pathways can be adjusted. Under light illumination, spike feature photocurrent observed when carriers along microcrystal surface upon edge-contact geometry, absent mainly crystal interior top-contact geometry. Switching, rectifying, memristor functions are selectively realized just by modifying The underlying mechanism for observations further elucidated. This provides platform studying microscale crystals with adjustable supplies approach fabricating diverse functional devices changing contact-geometries.