CsPbBr3 fully-inorganic perovskite nano wire based visible light photoelectric detector and preparation method thereof

A technology of nanowires and inorganic calcium, applied in the field of inorganic perovskite nanowire thin films, can solve the problems of insufficient production of high-performance photodetectors, complex vacuum coating technology, destroying ligands, etc., and achieves low cost of experimental raw materials, Good photoelectric response performance and energy saving effect

Inactive Publication Date: 2018-04-17
HUBEI UNIV
View PDF4 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been many reports on cesium lead bromine nanowires before. In these reports, most of them use the traditional one-pot method to produce ultra-fine nanowires, but when they are assembled into thin films, complex vacuum coating technology is required; some reports The purity of nanowires can be improved by several high-speed centrifugation, but the ligands may be destroyed; some even need to

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • CsPbBr3 fully-inorganic perovskite nano wire based visible light photoelectric detector and preparation method thereof
  • CsPbBr3 fully-inorganic perovskite nano wire based visible light photoelectric detector and preparation method thereof
  • CsPbBr3 fully-inorganic perovskite nano wire based visible light photoelectric detector and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: Different growth time CsPbBr 3 Fabrication of Perovskite Nanowire Detectors:

[0041] (1) Ultrasonic the transparent glass substrate with deionized water, acetone, and alcohol for 20 minutes respectively, and then treat it with ultraviolet ozone environment for 30 minutes;

[0042] (2) Preparation of non-perovskite phase CsPbI by soap-free solution method 3 nanowire film

[0043] 1M PbI 2 Dissolve in DMF (N,N-dimethylformamide), incubate at 70°C for 12 hours to fully dissolve, then filter for later use; dissolve CsI in methanol solution and stir for 20 minutes for later use; PbI 2 The solution was spin-coated on a transparent glass substrate at 5000 rpm for 60 seconds, and then dried on a hot stage. After 15 minutes, the PbI 2 The substrate of the film is soaked in CsI / methanol solution for 3-12 hours, and then dried;

[0044] (3) The non-perovskite phase CsPbI was synthesized by ion exchange method 3 Nanowire film conversion to non-perovskite phase CsP...

Embodiment 2

[0051] Example 2: CsPbBr annealed at different temperatures 3 Fabrication of perovskite nanowire detectors:

[0052] (1) Ultrasonic the transparent glass substrate with deionized water, acetone, and alcohol for 20 minutes respectively, and then treat it with ultraviolet ozone environment for 30 minutes;

[0053] (2) Preparation of non-perovskite phase CsPbI by soap-free solution method 3 nanowire film

[0054] 1M PbI 2 Dissolve in DMF (N,N-dimethylformamide), incubate at 70°C for 12 hours to fully dissolve, then filter for later use; dissolve CsI in methanol solution and stir for 20 minutes for later use; PbI 2 The solution was spin-coated on a transparent glass substrate at 5000 rpm for 60 seconds, and then dried on a hot stage. After 15 minutes, the PbI 2 The substrate of the film was soaked in CsI / methanol solution for 6 hours, and then dried;

[0055] (3) The non-perovskite phase CsPbI was synthesized by ion exchange method 3 Nanowire film conversion to non-perovskit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a CsPbBr3 fully-inorganic perovskite nano wire based visible light photoelectric detector and a preparation method thereof. The detector structurally comprises transparent glass, a CsPbBr3 perovskite nano wire film and Au, and the CsPbBr3 perovskite nano wire film synthesized in a soap-free solution method and an ion exchange method serves as a perovskite light absorption layer. The detector is high in on/off ratio and water and oxygen stability, and the photoelectric current attenuation amplitude is lower than 4.9% when the detector is placed in the atmospheric environment at the average temperature of 32 DEG C and the average relative humidity of 75% for 200h; light-dark current of the detector is not attenuated obviously after that the detector is irradiated continuously for 10000s by ultraviolet light in the intensity of 2.2mW cm<-2>; and the detector can detect visible light within the detection range of 300-540nm. The detector is simple in manufacturing technology, low in cost, and suitable for batch and industrialized production. The dark current of the detector is as low as 100pA, and energy can be saved. The prepared detector has higher responsibility and detection sensitivity.

Description

technical field [0001] The invention relates to the technical field of semiconductor nanometer materials and photoelectric detectors, in particular to the preparation of all-inorganic perovskite nanowire films by combining a soap-free solution method and an ion exchange method. A photodetector of visible light with high performance is prepared by different nanowire growth time and different annealing temperature. Background technique [0002] In recent years, halide perovskite materials have received extensive attention in the fields of solar cells, light-emitting diodes, and other optoelectronic devices due to their wide range of wavelength tunability and high carrier diffusion length. [1,2] . For detectors, organic-inorganic materials have attracted much attention due to their advantages such as simple preparation process and low energy consumption for visible light detection. Organic-inorganic hybrid perovskite combines N-type materials and P-type materials to form a PI...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01L31/09H01L31/0352H01L31/032H01L31/18
CPCH01L31/032H01L31/035227H01L31/09H01L31/18Y02P70/50
Inventor 王浩曾俊鹏周海张军
Owner HUBEI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap