Heterointerface engineering of layered double hydroxide/MAPbBr3 heterostructures enabling tunable synapse behaviors in a two-terminal optoelectronic system

Answer-processable semiconductor heterostructures allow scalable fabrication of excessive efficiency digital and optoelectronic gadgets with tunable capabilities through heterointerface management. Particularly, synthetic optical synapses require interface manipulation for nonlinear sign processing. Nevertheless, the restricted combos of supplies for heterostructure building have restricted the tunability of synaptic behaviors with easy system configurations. Herein, MAPbBr3 nanocrystals had been hybridized with MgAl layered double hydroxide (LDH) nanoplates by a room temperature self-assembly course of. The formation of such heterostructures, which exhibited an epitaxial relationship, enabled efficient gap switch from MAPbBr3 to LDH, and significantly diminished the defect states in MAPbBr3. Importantly, the ion-conductive nature of LDH and its skill to kind a charged floor layer even below low humidity circumstances allowed it to draw and entice holes from MAPbBr3. This imparted tunable synaptic behaviors and short-term plasticity (STP) to long-term plasticity (LTP) transition to a two-terminal system based mostly on the LDH-MAPbBr3 heterostructures. The additional neuromorphic computing simulation below various humidity circumstances showcased their potential in studying and recognition duties below ambient circumstances. Our work presents a brand new kind of epitaxial heterostructure comprising metallic halide perovskites and layered ion-conductive supplies, and supplies a brand new means of realizing charge-trapping induced synaptic behaviors.

Graphical abstract: Heterointerface engineering of layered double hydroxide/MAPbBr3 heterostructures enabling tunable synapse behaviors in a two-terminal optoelectronic device

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