Double-excitation pressure memory device

Abstract

The invention belongs to the technical field of flexible pressure sensor preparation, and relates to a double-excitation pressure memory device which is composed of a DPM device matrix, and the DPM device matrix is composed of a piezoelectric memristor array and a piezoelectric OLED array which are orthogonally arranged in a uniform configuration. By utilizing the amphoteric characteristics of piezoelectric photosensitivity and piezoelectric electrosensitivity of the MoOx memristor material, an electronic skin memory system integrating perception and storage is realized; the characteristic that the forbidden bandwidth of the material can be modulated and the photoelectric conversion efficiency of the material can be improved under the condition of micro strain is utilized, the dual gains of a control gate and a channel can be achieved through modulation of the forbidden bandwidth of the piezoelectric nanowire by utilizing the piezoelectric luminescence effect and the piezoelectric channel effect, and the photoelectric conversion efficiency of the material can be improved. The device can realize an ultrahigh dynamic range and high pressure sensitivity, so that a stress distribution output signal with high contrast and high fineness is obtained. The storage time of pressure memory is long and stable, erasing and refreshing can be achieved through reset voltage, and the method has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of flexible pressure sensor preparation, and in particular relates to a double-excitation pressure memory device. Background technique [0002] With the development of bionic artificial intelligence systems, biological neuromorphic sensory organs that can recognize external stimulus signals and process corresponding physical information in complex environments have aroused great interest among scholars. Biomimetic electronic skin devices based on pressure sensors have been applied in biomimetic mechatronics, auxiliary medical equipment and neural network systems together with nanowires, 2D materials, organic materials, etc. However, low stress signal response strength and poor energy conversion efficiency are international problems in the field of bionic electronic skin and other mechanical sensors. Moreover, the pressure sensor only has a single function of detecting force information through simple conver...

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Problems solved by technology

[0003] At present, international research on the output mechanism of stress sensors generally adopts the direct conversion of pressure signals into electrical signals, which requires a large strain space and stress intensity. The essential problem of low conversion efficiency and signal attenuation

At the same time, the preparation method of a bionic electronic skin memory device with perception and storage is still in a blank state

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