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Lead sulfide photoconductive detector and preparation method thereof

A lead sulfide, photoconductive technology, applied in semiconductor devices, circuits, electrical components, etc., to achieve the effect of simple process, increased photocurrent intensity and detector responsivity, and improved light absorption efficiency

Pending Publication Date: 2022-05-20
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, lead sulfide infrared detectors are mainly used, and the photocurrent intensity and responsivity of lead sulfide infrared detectors need to be further improved.

Method used

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  • Lead sulfide photoconductive detector and preparation method thereof
  • Lead sulfide photoconductive detector and preparation method thereof
  • Lead sulfide photoconductive detector and preparation method thereof

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Embodiment Construction

[0040] In order to make the technical solution and advantages of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments of the present invention, so that those skilled in the art do not need to pay any more creative work The invention can be realized. It should be noted that the simplified form of the drawings is only used for the purpose of conveniently and clearly illustrating the embodiment of the invention. The structure shown in the drawings is not the whole of the actual structure but only a part of the actual structure. Obviously, the enumerated embodiments are part of the embodiments of the present invention, but not all of them. It should be understood that, based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts are within the protecti...

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Abstract

The invention discloses a lead sulfide photoconductive detector and a preparation method thereof, and the lead sulfide infrared detector comprises a substrate which is sequentially covered with a metal electrode, a graphene film, gold nanoparticles, a lead sulfide single crystal film and bismuth metal nanoparticles upwards. Wherein the metal electrodes are laid at the two ends of the lower portion of the graphene film respectively. The invention aims to realize dotted coating on the surface of lead sulfide by using bismuth metal nanoparticles to increase the light absorption of lead sulfide, thereby improving the responsivity of a traditional lead sulfide photoconductive infrared detector. The responsivity of the metal nanoparticle light absorption enhanced lead sulfide photoconductive infrared detector obtained on the basis can be improved by two orders of magnitude.

Description

technical field [0001] The invention relates to the technical field of semiconductor optoelectronic devices, in particular to a lead sulfide photoconductive detector and a preparation method thereof. Background technique [0002] A photodetector is a device that converts optical signals into electrical signals. The main categories are photoconductive, built-in electric field photovoltaic, photothermoelectric and bolometer. Photoelectric detectors were initially used in military operations. In 1930, German researchers developed a lead sulfide infrared photon detector with a detection wavelength of about 3 microns. During World War II, lead sulfide detectors played a huge role in the war as a secret weapon, and infrared detection technology became one of the important research directions in the military field. Photoelectric detectors are mainly used in night vision, guidance, reconnaissance, communication, etc. in modern military affairs. Bismuth has high electron mobility a...

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Application Information

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IPC IPC(8): H01L31/0216H01L31/09H01L31/18B82Y15/00B82Y20/00B82Y40/00
CPCH01L31/09H01L31/02161H01L31/18B82Y20/00B82Y15/00B82Y40/00Y02P70/50
Inventor 冯双龙闫瑞阳申钧史浩飞
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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