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Horizontal thermoelectric optical detector of multilayer structure

A technology of transverse pyroelectric and optical detectors, which is applied in the direction of using electric radiation detectors for photometry and thermoelectric device components, etc., can solve the problems of low detection sensitivity, small absorption rate, and damage to working components, and achieve improved detection sensitivity, Effects of increased detection sensitivity and extended service life

Inactive Publication Date: 2015-01-07
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current transverse pyroelectric detectors are composed of a transverse pyroelectric element, and their detection sensitivity is low
Secondly, due to the small absorption rate of the incident infrared light and the low photothermal conversion efficiency of the working elements of this single-structure transverse pyroelectric detector, the detection sensitivity to infrared light is reduced.
Thirdly, the working elements of this single-structure transverse pyroelectric photodetector are directly exposed to the working environment. When the incident light power is large, the working environment is humid or corrosive, it is easy to cause damage to the working elements, reducing the detector’s performance. service life

Method used

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  • Horizontal thermoelectric optical detector of multilayer structure
  • Horizontal thermoelectric optical detector of multilayer structure
  • Horizontal thermoelectric optical detector of multilayer structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Detection of Infrared Continuous Light by a Double-Layer Structure Transverse Pyroelectric Optical Detector

[0029] 1. The transverse thermoelectric element is adopted in LaALO 3 A bismuth strontium cobalt oxide thin film grown on a single crystal substrate with a c-axis tilt, and the tilt angle is 10°. Wipe the surface of the film with alcohol and let it dry naturally before use.

[0030] 2. Ag electrodes are symmetrically plated on the left and right sides of the upper surface of the above-mentioned transverse thermoelectric element, and the electrode spacing is 6mm;

[0031] 3. Stick two identical transverse thermoelectric elements together with thermally conductive tape to form an upper and lower laminated structure and ensure that the c-axis inclination directions of the two transverse thermoelectric elements are opposite;

[0032] 4. Stick an oxygen-free copper sheet with a thickness of 0.2mm on the upper surface of the first transverse thermoelectri...

Embodiment 2

[0040] Example 2: Detection of Visible Continuous Light by Transverse Pyroelectric Photodetector with Three-Layer Structure

[0041] 1. The transverse thermoelectric element is adopted in LaALO 3 A bismuth strontium cobalt oxide thin film grown on a single crystal substrate with a c-axis tilt, and the tilt angle is 10°. Wipe the surface of the film with alcohol and let it dry naturally before use.

[0042] 2. Ag electrodes are symmetrically plated on the left and right sides of the upper surface of the above-mentioned transverse thermoelectric element, and the electrode spacing is 6mm;

[0043] 3. Stick three identical transverse thermoelectric elements together with thermally conductive tape to form an upper and lower laminated structure and ensure that the c-axis inclination directions of two adjacent transverse thermoelectric elements are opposite;

[0044] 4. Stick an oxygen-free copper sheet with a thickness of 0.2mm on the upper surface of the first transverse thermoel...

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Abstract

The invention relates to a horizontal thermoelectric optical detector of a multilayer structure and belongs to the technical field of optical detector equipment. The horizontal thermoelectric optical detector is sequentially composed of a light absorbing layer bonded through a heat-conduction tape, a metal copper piece, horizontal thermoelectric elements and a metal support. Two symmetrical metal electrodes are arranged on the upper surface of the horizontal thermoelectric elements to serve as the voltage signal output ends, the voltage signal output ends of the horizontal thermoelectric elements are connected with the input end of a voltage meter through electrode leads, the horizontal thermoelectric elements are stacked into N groups, each layer of horizontal thermoelectric elements are bonded through heat-conduction tapes, and the output ends led out of each layer of the horizontal thermoelectric elements are in serial connection. The horizontal thermoelectric optical detector of the multilayer structure has the advantages of avoiding refrigeration, achieving full spectrum detection and being high in detecting flexibility, large in damage threshold and long in service life. Compared with a horizontal thermoelectric optical detector of a single structure, the detecting flexibility of the horizontal thermoelectric optical detector on 980nm continuous laser is improved by more than 1.5 times.

Description

technical field [0001] The invention relates to a multilayer structure transverse pyroelectric photodetector, which belongs to the technical field of photodetector equipment. Background technique [0002] When the incident light is irradiated on the upper surface of a c-axis obliquely grown thin film or single crystal material, the upper surface of the material will generate a longitudinal temperature difference ΔT on the upper and lower surfaces due to the absorption of the energy of the incident light. If the Seebeck coefficient of the material Anisotropy will generate a lateral voltage signal on the upper surface along the direction of the material's oblique growth. This effect is called the lateral thermoelectric effect. Among them, the amplitude of the output voltage signal of the transverse thermoelectric effect is related to the difference ΔS of the Seebeck coefficient between the ab plane direction and the c-axis direction of the material, the sine value of twice the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/42H01L35/02H10N10/80
Inventor 王淑芳白子龙闫国英傅广生于威李晓苇
Owner HEBEI UNIVERSITY