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Narrow-band multispectral perovskite photoelectric detector and preparation method and application thereof

A photodetector and perovskite technology, applied in the field of photodetectors, can solve the problems of low external quantum efficiency of narrow-band multispectral photodetectors, unable to exert material performance, slow response speed, etc., to improve external quantum efficiency, EQE The effect of higher value and shorter response time

Pending Publication Date: 2020-08-18
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, simply introducing perovskite materials into the traditional device structure, the narrow-band multi-spectral photodetectors prepared currently have difficulties such as low external quantum efficiency, slow response speed, and insufficient bandwidth, which cannot give full play to the excellent performance of the material.

Method used

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  • Narrow-band multispectral perovskite photoelectric detector and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0152] The structure of the narrow-band multispectral perovskite photodetector described in this embodiment is as follows:

[0153] The structure of the perovskite photodetector: the transparent electrode is FTO transparent conductive glass with a sheet resistance of 10Ω and a transmittance of 95%; the electron transport layer consists of TiO with a thickness of 30nm 2 Dense layer and TiO with a thickness of 200nm 2 Mesoporous layer; N-type perovskite layer (precursor PbX 2 and CH 3 NH 3 The molar ratio of X is 1.05:1), the thickness is 480nm, and the P-type perovskite layer (PbX 2 with CH 3 NH 3 The molar ratio of X is 0.9) and the thickness is 60nm, the ratio of the thickness of the N-type perovskite layer to the P-type perovskite layer is 8, the metal electrode is an Au electrode, and the thickness of the gold electrode is 80nm.

[0154] The diffractive waveguide grating array is a micro-nano grating array, which includes three micro-nano gratings arranged side by sid...

Embodiment 2

[0169] The difference between this embodiment and Embodiment 1 is that the transparent electrode in the perovskite photodetector is FTO transparent conductive glass, its square resistance is 25Ω, and the transmittance is 80%; the electron transport layer includes a thickness of 50nm TiO 2 Dense layer and TiO with a thickness of 200nm 2 Mesoporous layer; N-type perovskite layer (precursor PbX 2 and CH 3 NH 3 The molar ratio of X is 1.15:1) and the thickness is 500nm, the P-type perovskite layer (precursor PbX 2 with CH 3 NH 3 The molar ratio of X is 0.92) and the thickness is 80nm, the ratio of the thickness of the N-type perovskite layer to the P-type perovskite layer is 6.25, the metal electrode is an Ag electrode, and the thickness of the Ag electrode is 100nm, calcium The preparation method of titanium ore photodetector comprises the following steps:

[0170] (1') Place the transparent electrode on the back of the substrate in step (1), spin-coat a 1-butanol solution...

Embodiment 3

[0177] The difference between this embodiment and Embodiment 1 is that the thickness of the N-type perovskite layer is 480nm, the thickness of the P-type perovskite layer is 80nm, and the ratio of the thickness of the N-type perovskite layer to the P-type perovskite layer is 6 , other conditions compared with embodiment 1 are identical.

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Abstract

The invention relates to a narrow-band multispectral perovskite photoelectric detector and a preparation method and application thereof. The narrow-band multispectral perovskite photoelectric detectorcomprises a perovskite photoelectric detector and a diffraction waveguide grating located at one end of incident light of the perovskite photoelectric detector. According to the narrow-band multispectral perovskite photoelectric detector, the depth, the period and the duty ratio of the structure of the diffraction waveguide grating, the refractive index of the grating layer material and the refractive index of the substrate can be adjusted, so that absorption, scattering, diffraction and polarization characteristics of light with different wavelengths are regulated and controlled, a filteringfunction is adjusted, narrow-band color filtering is carried out on incident light, and narrow-band multispectral response is realized.

Description

technical field [0001] The invention belongs to the field of photodetectors, and relates to a narrow-band multi-spectrum perovskite photodetector and its preparation method and application. Background technique [0002] Photodetectors can detect and identify the measured object according to the light waves radiated or reflected by the detected object, which play an important supporting role in military, national defense, machine vision, biosensing and imaging, optical communication and other application fields. Traditional photodetectors are mostly made of silicon carbide, silicon, indium gallium arsenic, and germanium. However, the obtained devices have disadvantages such as high manufacturing cost, complicated process, limited detection wavelength range, or inflexibility. [0003] In recent years, perovskite materials have been widely used in the field of optoelectronic devices due to their high absorption coefficient, wide band coverage from ultraviolet to near infrared, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCH10K71/00H10K30/10H10K30/80Y02E10/549
Inventor 吴丹王恺刘皓宸昂科科觉李文辉孙小卫
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA