Perovskite weak light detector based on plasmon effect

Abstract

The invention discloses a perovskite weak light detector based on a plasmon effect, which comprises a substrate, a photoconductive layer and a metal electrode. The substrate is composed of a flexibleor rigid base. The photoconductive layer is located on the surface of the substrate, and the photoconductive layer is composed of metal nanoparticles with a plasmon effect and perovskite. The metal electrode is located on the surface of the photoconductive layer and forms a conductive electrode. According to the invention, metal nanoparticles with a plasmon effect and perovskite are mainly used aslight absorption materials to form a photoconductive structure, light is absorbed efficiently by utilizing the large extinction coefficient of perovskite, the response of the device to weak light isamplified through optical coupling between the perovskite and the metal nanoparticle plasmon, and finally, photoelectric conversion is realized through a photoconductive mode, and the device can detect a 5pW weak light signal and has photoresponsivity of 1A/W. The invention has great guidance value and significance in future research and development of a perovskite weak light detector based on a plasmon effect.

Description

Technical field [0001] The invention relates to the technical field of detectors, in particular to a perovskite low-light detector based on the plasmon effect. Background technique [0002] Photodetector is an electronic device that uses semiconductor materials to absorb light energy and form a photocurrent output through the photoelectric effect. At present, based on the development of various optoelectronic applications and wearable devices, highly sensitive and flexible low-light detectors have become more This is because such devices can achieve high-resolution low-light detection while achieving flexibility. Therefore, such devices have found many applications in emerging fields such as electronic eyes, biosensing, and smart tags. At present, the mainstream The photodetectors are mainly composed of semiconductor materials such as silicon carbide, gallium phosphide, indium gallium arsenide, etc. UV, visible, and near-infrared photodetectors. However, they are limited by the l...

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Problems solved by technology

[0002] A photodetector is an electronic device that uses semiconductor materials to absorb light energy and generate a photocurrent output through the photoelectric effect. At present, based on the development of various optoelectronic applications and wearable devices, highly sensitive flexible weak light detectors are becoming more and more It is becoming more and more important because this type of device can achieve high-resolution weak light detection while achieving flexibility. Therefore, this type of device has won many applications in emerging fields such as electronic eyes, biosensing, and smart labels. At present, the mainstream The photodetectors are mainly composed of semiconductor materials such as silicon carbide, gallium phosphide, and indium gallium arsenic to form ultraviolet, visible, and near-infrared photodetectors. The hot carrier distribution factor of the device causes the device to have a high dark noise level, and eventually it loses the ability to detect weak light, or must work in a cooling mode. Recently, studies have shown that the introduction of metal nanocrystals into photodetection devices Among them, the e

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