Pulsimeter based on graphene edge embedded type nano-film photoelectric sensor

Abstract

The invention discloses a pulsimeter based on a graphene edge embedded type nano-film photoelectric sensor. The pulsimeter comprises an infrared light source unit for fixing a finger, to be detected, of a user and emitting infrared light of a specified wavelength to penetrate through the finger of the user; a photoelectric sensor unit for collecting an infrared light signal and generating a photoelectric signal according to the infrared light signal, wherein a graphene edge embedded type nano-film is grown on the surface of a silicon substrate of the photoelectric sensor unit through ECR plasma irradiation; a rectifying and amplifying unit for rectifying and amplifying the photoelectric signal to obtain a rectified and amplified signal; and a signal acquisition unit for acquiring and storing the rectified and amplified signal. According to the pulsimeter, by capturing photogenerated electrons with a boundary quantum well, recombination of photogenerated electron-hole pairs can be reduced greatly, the photoresponse rate can be increased, and human fingertip pulse signals can be measured more accurately and stably.

Description

technical field [0001] The invention relates to the field of nano-film photoelectric technology, in particular to a pulse meter based on a graphene edge-embedded nano-film photoelectric sensor. Background technique [0002] Two-dimensional materials (such as graphene, molybdenum disulfide, black phosphorus, etc.) have the potential to be used in wearable devices due to their advantages such as ultra-high electron mobility, broad spectrum absorption, flexibility, and breakthrough in size limit. Potential for a new generation of photosensor materials. However, the current research on the photoresponse principle of 2D materials is still focused on the 2D plane, and the role of low-coordination atoms at the 2D edge in the photoelectric response is rarely considered. To a large extent, it hinders the practical process of new photoelectric sensors with high output, fast response and multispectral imaging. The currently widely used wearable photoelectric pulsometer has low photor...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a pulse meter based on graphene edge embedded nano-film photoelectric sensors, aiming to solve the low photoresponse rate of the wearable photoelectric pulse meter in the prior art, and the pulse Weak photoelectric signal and poor stability

Images