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Paper-like-based flexible ultraviolet detector based on interface optimization and preparation method thereof

A technology with interface optimization and base flexibility, applied in the field of ultraviolet detection, can solve the problems of low mechanical strength of the film layer, incompatibility with industrialized mass production, complex process flow, etc., to achieve low cost, improve carrier transmission, and process steps. simple effect

Active Publication Date: 2019-06-18
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above method uses flexible plastics such as PET instead of wire substrates for device construction, which improves the overall flexibility of the device and can realize flexible and wearable applications. The mechanical strength of the layer is not high and the process is relatively complicated, which is not compatible with industrial mass production

Method used

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  • Paper-like-based flexible ultraviolet detector based on interface optimization and preparation method thereof
  • Paper-like-based flexible ultraviolet detector based on interface optimization and preparation method thereof
  • Paper-like-based flexible ultraviolet detector based on interface optimization and preparation method thereof

Examples

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Embodiment approach

[0023] As a preferred embodiment, the flexible substrate adopts a polyvinylidene fluoride (PVDF) porous filter membrane with a pore size of 1.5 μm to 5 μm.

[0024] As a preferred embodiment, the diameter of a single silver nanowire in the silver nanowire thin film layer is 20 nm to 100 nm.

[0025] As a preferred embodiment, the zinc oxide nanowire film layer has a thickness of 2 μm to 5 μm, a single zinc oxide nanowire on it has a length of 10 μm to 100 μm, and a diameter of 50 nm to 100 nm.

[0026] As a preferred embodiment, the CsPbBr 3 The thickness of the nanosheet film layer is 100nm-300nm, on which CsPbBr 3 The nanosheets are in a regular rectangular shape, with a size range of 0.2 μm to 1 μm in length and 0.2 μm to 1 μm in width.

[0027] A method for preparing a paper-based flexible ultraviolet light detector based on interface optimization, characterized in that it comprises the following steps:

[0028] Step 1, take silver nanowire isopropanol solution, zinc ox...

Embodiment 1

[0039] see figure 1 , this embodiment is based on the paper-like flexible ultraviolet light detector with interface optimization, and uses the porous filter membrane as the flexible substrate, adopts the solution suction filtration method to prepare silver nanowire thin film layer, zinc oxide nanowire thin film layer, CsPbBr on the substrate 3 The nanosheet thin film layer is used as the bottom electrode layer, the light sensing layer, and the interface optimization layer, and then a single layer of graphene is attached on the top of the interface optimization layer as a transparent electrode to construct a structure with silver nanowires / zinc oxide nanowires / CsPbBr 3 Flexible UV detectors with nanosheet / graphene structures. Concretely prepare according to the following steps:

[0040](1) Take 50ml of isopropanol solution and add 1ml of zinc oxide nanowire solution, and ultrasonically disperse evenly. The zinc oxide nanowires used are 10 μm in length and 50 nm in diameter. ...

Embodiment 2

[0046] In this example, the structure of the paper-like flexible ultraviolet light detector based on interface optimization is the same as that of Example 1, and its preparation method is carried out according to the following steps:

[0047] (1) Take 50ml of isopropanol solution and add 1ml of zinc oxide nanowire solution, and ultrasonically disperse evenly. The zinc oxide nanowires used are 50 μm in length and 50 nm in diameter. Take 50ml of isopropanol solution and add 1ml of silver nanowire solution, and disperse evenly by ultrasonic. A single silver nanowire has a diameter of 50nm. Take 50ml of toluene solution and add CsPbBr 3 Nanosheet solution 0.5ml, ultrasonically dispersed evenly. CbBr 3 The dimensions of the nanosheets are: length 0.5 μm-1 μm, width 0.5 μm-1 μm.

[0048] (2) Lay a polyvinylidene fluoride (PVDF) porous filter membrane on the top of the conical flask of the vacuum filtration system, soak it with isopropanol to make the filter membrane tightly ads...

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Abstract

The invention discloses a paper-like-based flexible ultraviolet detector based on interface optimization and a preparation method thereof. A porous filter membrane is used as a flexible substrate; a silver nanowire thin film layer, a zinc oxide nanowire thin film layer and a CsPbBr3 nanosheet thin film layer are sequentially prepared on the flexible substrate to serve as a bottom electrode layer,a light sensing layer and an interface optimization layer respectively; single-layer graphene is attached to the top of the CsPbBr3 nanosheet thin film layer to serve as a transparent electrode; and the flexible ultraviolet detector with the silver nanowire / zinc oxide nanowire / CsPbBr3 nanosheet / graphene structure is constructed. The used solution method-based device construction process is simplein step and low in cost, and has the potential of large-area industrial production; and the prepared paper-like-based flexible ultraviolet detector has relatively high ultraviolet response and stablelight response performance.

Description

technical field [0001] The invention relates to the technical field of ultraviolet detection, in particular to a paper-like flexible ultraviolet detector based on interface optimization and a preparation method thereof. Background technique [0002] In recent years, flexible light detection equipment has been widely used in communication, health and safety due to its excellent wearable characteristics, and ultraviolet light detection equipment has been successfully used in optical communication and military detection due to its strong anti-interference ability and high detection sensitivity. , biosensing, ozone detection and many other fields. Flexible and wearable ultraviolet photodetectors currently focus on fiber-like and fabric-like photodetectors. Although fiber-like devices can achieve 360° light detection, the mechanical strength of the inorganic light-sensing material layer grown directly on the flexible substrate is not high. , the dynamic contact between the whole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0216H01L31/0392H01L31/101H01L31/18B82Y30/00
CPCY02P70/50
Inventor 邹友生鞠丹朱正峰刘舒婷
Owner NANJING UNIV OF SCI & TECH
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