Solution-processable semiconductor heterostructures enable scalable fabrication of high-performance electronic and optoelectronic devices with tunable functionality. through Heterointerface control. In particular, artificial optical synapses require interface manipulation for nonlinear signal processing. However, the limited combination of materials for heterostructure construction has limited the potential for tuning synaptic behavior with simple device construction. where MAPbBrthree Nanocrystals were hybridized with MgAl layered double hydroxide (LDH) nanoplates through a room temperature self-assembly process. The formation of these heterostructures exhibiting epitaxial relationships enabled effective hole transfer from MAPbBr.three converted to LDH and significantly reduced the defect state of MAPbBr.three. Importantly, the ionic conductive properties of LDH and its ability to form a charged surface layer even under low humidity conditions enable it to attract and trap holes in MAPbBr.three. This endowed the LDH-MAPbBr-based two-terminal device with tunable synaptic behavior and the transition from short-term plasticity (STP) to long-term plasticity (LTP).three Heterostructure. Additional neuromorphic computing simulations under varying humidity conditions demonstrated the potential for learning and recognition tasks under ambient conditions. Our study presents a new type of epitaxial heterostructure composed of metal halide perovskites and layered ionic conductive materials and provides a new method to realize charge trap-induced synaptic behavior.
Heterointerface engineering of layered double hydroxide/MAPbBr3 heterostructures enabling tunable synapse behaviors in a two-terminal optoelectronic device
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