Abstract
Layered 2D (PbI2)1−x(BiI3)x materials exhibit a nonlinear dependence in structural and charge transport properties unanticipated from the combination of PbI2 and BiI3. Within (PbI2)1−x(BiI3)x crystals, phase integration yields deceptive structural features, while phase boundary separation leads to new conductance switching behavior observed as large peaks in current during current–voltage (I–V) measurements (±100 V). Temperature- and time-dependent electrical measurements demonstrate that the behavior is attributed to ionic transport perpendicular to the layers. High-resolution transmission electron microscopy reveals that the structure of (PbI2)1−x(BiI3)x is a “brick wall” consisting of two phases, Pb-rich and Bi-rich. These brick-like features are 10s nm a side and it is posited that iodide ion transport at the interfaces of these regions is responsible for the conductance switching action.
Original language | English (US) |
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Article number | 2103098 |
Journal | Advanced Materials |
Volume | 33 |
Issue number | 51 |
DOIs | |
State | Published - Dec 23 2021 |
Keywords
- conductance switching
- nanoscale crystals
- nonlinear charge transport
- phase separation
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering