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Three-dimensional sodium-bismuth-sulfur flower-like microsphere structure, preparation method thereof and application of three-dimensional sodium-bismuth-sulfur flower-like microsphere structure in wide-spectrum photoelectric detector

A photodetector, three-dimensional sodium bismuth technology, applied in capacitors, electrolytic capacitors, chemical instruments and methods, etc., can solve the problem of rarely reported broadband detection performance, and achieve excellent broadband detection, fast response, repeatable good effect

Pending Publication Date: 2022-07-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, domestic and foreign studies on three-dimensional NaBiS 2 The preparation of flower-like microsphere structures has not been reported, especially based on NaBiS 2 There are few reports on the wide-band detection performance of materials.

Method used

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  • Three-dimensional sodium-bismuth-sulfur flower-like microsphere structure, preparation method thereof and application of three-dimensional sodium-bismuth-sulfur flower-like microsphere structure in wide-spectrum photoelectric detector
  • Three-dimensional sodium-bismuth-sulfur flower-like microsphere structure, preparation method thereof and application of three-dimensional sodium-bismuth-sulfur flower-like microsphere structure in wide-spectrum photoelectric detector
  • Three-dimensional sodium-bismuth-sulfur flower-like microsphere structure, preparation method thereof and application of three-dimensional sodium-bismuth-sulfur flower-like microsphere structure in wide-spectrum photoelectric detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A three-dimensional NaBiS 2 The preparation method of flower-shaped microsphere structure, the concrete steps are as follows:

[0036]Step 1. Prepare an alkaline solution containing 0.1 mol of sodium hydroxide, then add 1 mmol of thiourea and 0.2 mmol of bismuth oxide to the prepared alkaline solution in turn, and continue stirring for 3 hours to obtain a precursor solution; It was transferred to an autoclave with a filling degree of 40%, sealed and put into a constant temperature heating drying oven, hydrothermally reacted at 200 ° C for 24 hours, cooled to room temperature, taken out the sample, washed with deionized water and ethanol in turn and kept at room temperature. under drying to obtain three-dimensional NaBiS 2 Flower-shaped microspheres.

[0037] figure 1 for NaBiS 2 Low magnification SEM image of flower-like microspheres. from figure 1 A large amount of NaBiS with good dispersion can be observed in 2 Microspheres, they remain nearly the same shape an...

Embodiment 2

[0039] A NaBiS 2 A method for making a flower-shaped microsphere wide-spectrum photodetector, the method steps are as follows:

[0040] The NaBiS prepared in Example 1 2 The flower-shaped microspheres were spin-coated on the FTO conductive substrate as the working electrode and the Pt electrode as the counter electrode by a spin coater. The two were hot-pressed at 145 °C for 16 seconds and connected together by a heat-sealing film. Through capillary injection into the device, the NaBiS is completed 2 Preparation of flower-like microsphere photodetectors.

[0041] The UV detection performance of the prepared detector was tested under the condition of zero bias. Figure 5 for NaBiS 2 Photocurrent density curve of flower-shaped microsphere photodetector under ultraviolet light (365nm) irradiation, it can be seen from the figure that the maximum photocurrent density of the detector is 304.35μA / cm 2 . The variation trend of photocurrent density is basically the same under mul...

Embodiment 3

[0045] A three-dimensional NaBiS-based 2 A preparation method of a flexible photodetector with a flower-like microsphere structure, the method steps are as follows:

[0046] The NaBiS prepared in Example 1 2 The flower-shaped microspheres were spin-coated on the PET-ITO flexible substrate as the working electrode by a spin coater, the solid electrolyte was uniformly deposited on the working electrode, and the Ag-deposited PET-ITO was used as the counter electrode, and the two electrodes were assembled on the Together, dry naturally for 12 hours to complete NaBiS 2 Fabrication of flexible photodetectors with flower-like microspheres. The NaBiS 2 The flexible photodetector of flower-like microspheres can realize broadband detection of ultraviolet, visible to infrared light under bending conditions.

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Abstract

The invention relates to a preparation method of a three-dimensional sodium-bismuth-sulfur flower-like microsphere structure and application of the three-dimensional sodium-bismuth-sulfur flower-like microsphere structure in a wide-spectrum photoelectric detector, NaBiS2 is a flower-like microsphere layered structure assembled by a plurality of two-dimensional NaBiS2 nanosheets, and each two-dimensional NaBiS2 nanosheet is formed by mutually and regularly interweaving a large number of thin sheets. The prepared NaBiS2 flower-like microspheres are used as a main body material to construct the photoelectric detector. The NaBiS2 flower-like microsphere detector prepared by the invention can realize wide spectrum detection from ultraviolet, visible and infrared bands, and can work under the condition of zero bias voltage. According to the invention, the NaBiS2 flower-like microsphere with a unique three-dimensional layered structure is synthesized, a self-powered wide-spectrum photoelectric detector with high sensitivity is prepared based on the NaBiS2 flower-like microsphere, and the application of the NaBiS2 material in the field of photoelectric detection is expanded.

Description

technical field [0001] The invention belongs to the technical field of semiconductor detection material preparation, and in particular relates to a three-dimensional sodium-bismuth-sulfur flower-like microsphere structure, a preparation method and its application in a wide-spectrum photodetector. Background technique [0002] In recent years, photodetectors have received extensive attention due to their applications in various fields such as communications, national defense, biomedicine, environmental monitoring, and ocean exploration. Generally speaking, photodetectors can be divided into ultraviolet, visible and infrared detectors according to the wavelength detection range. Compared to these single-band detectors, broad-spectrum photodetectors can simultaneously detect light in the ultraviolet, visible, and infrared wavelength ranges, which are critical for military, industrial, and civilian applications. At present, the reported materials for wide-spectrum detectors are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/20C01G29/00B82Y40/00B82Y30/00B82Y15/00
CPCH01G9/2004H01G9/042H01G9/0029C01G29/006B82Y15/00B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2004/61C01P2004/32
Inventor 高世勇容萍王金忠任帅张勇贾杰
Owner HARBIN INST OF TECH
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