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A kind of preparation method of composite fluorescent nanofiber film

A technology of fluorescent nanofibers and nanofiber membranes, applied in fiber processing, textile and papermaking, electrospinning, etc., can solve the problems of time-consuming purification process, complex preparation method, high toxicity, etc., and achieve excellent stability and preparation method. The effect of simplicity, excellent color rendering and durability

Active Publication Date: 2019-11-12
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these materials exhibit excellent properties, their preparation methods are too complex: first, chemically synthesize CsPbX 3 quantum dots, and then mix them into a precursor solution, and finally form a fluorescent nanofiber film through E-Spun, and the preparation process needs to be carried out in a high temperature environment, and even a highly toxic solvent is required, and the subsequent purification process is quite Time-consuming, therefore, it is necessary to investigate a new method for the preparation of fluorescent nanofibrous membranes

Method used

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  • A kind of preparation method of composite fluorescent nanofiber film
  • A kind of preparation method of composite fluorescent nanofiber film
  • A kind of preparation method of composite fluorescent nanofiber film

Examples

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Embodiment 1

[0036] A method for preparing a composite fluorescent nanofiber film, said method comprising the steps of:

[0037] 1) Preparation of precursor solution: first 0.184g PbCl 2 Add 10ml of dimethylformyl to PbCl 2 After the complete dissolution, continue to add 0.104g CsI, and then add 0.2g polystyrene after the CsCl is completely dissolved to obtain the spinning precursor solution;

[0038]2) Preparation of nanofibrous membrane by polymer electrospinning: place the precursor solution in step 1) in a syringe pump, place copper foil 10 cm below the injection needle, and apply a voltage of 10 kV between the copper foil and the injection needle, Push the syringe pump at a constant speed of 0.67ml / h to obtain a nanofiber membrane on the copper foil, and separate the nanofiber membrane from the substrate to obtain the composite fluorescent nanofiber membrane FNM / CPC.

Embodiment 2

[0040] A method for preparing a composite fluorescent nanofiber film, said method comprising the steps of:

[0041] 1) Preparation of precursor solution: first 0.184g PbBr 2 Add 10ml of dimethylformyl to PbBr 2 After the complete dissolution, continue to add 0.104g CsBr, and then add 0.2g polystyrene after the CsBr is completely dissolved to obtain the spinning precursor solution;

[0042] 2) Preparation of nanofibrous membrane by polymer electrospinning: place the precursor solution in step 1) in a syringe pump, place copper foil 10 cm below the injection needle, and apply a voltage of 10 kV between the copper foil and the injection needle, Push the syringe pump at a constant speed of 0.67ml / h to obtain a nanofiber membrane on the copper foil, and separate the nanofiber membrane from the substrate to obtain the composite fluorescent nanofiber membrane FNM / CPB.

Embodiment 3

[0044] A method for preparing a composite fluorescent nanofiber film, said method comprising the steps of:

[0045] 1) Preparation of precursor solution: first, 0.184g PbI 2 Add 10ml dimethyl sulfoxide, wait for PbI 2 After complete dissolution, continue to add 0.104g CsI, and then add 0.2g polyvinyl alcohol after CsI is completely dissolved to obtain the spinning precursor solution;

[0046] 2) Preparation of nanofibrous membrane by polymer electrospinning: place the precursor solution in step 1) in a syringe pump, place copper foil 10 cm below the injection needle, and apply a voltage of 10 kV between the copper foil and the injection needle, Push the syringe pump at a constant speed of 0.67ml / h to obtain a nanofiber membrane on the copper foil, and separate the nanofiber membrane from the substrate to obtain the composite fluorescent nanofiber membrane FNM / CPI.

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Abstract

The invention relates to a preparation method of a composite FNM (fluorescent nanofiber membrane) and belongs to the field of preparation of FNMs. The method comprises the steps as follows: 1) preparation of a precursor liquid: firstly, lead halide is added to an organic solvent, cesium halide is continuously added after the lead halide is dissolved completely, polystyrene or polyvinyl alcohol isadded after the cesium halide is completely dissolved, and a spinning precursor liquid is obtained; 2) preparation of the NM with a polymer electrospinning method; the precursor liquid in the step 1)is placed in an injection pump, a conducting substrate is placed below an injection needle, voltage is applied between the conducting substrate and the injection needle, the injection pump is propelled at the constant speed, the NM is obtained on the substrate and separated from the substrate, and the composite FNM is obtained. The prepared composite FNM has the characteristics of wide light emitting color gamut and narrow FWHMs and has excellent stability in severe environments, and a WLED manufactured by integrating the prepared FNM / CPX in a blue light emitting chip has excellent color rendering property and durability.

Description

technical field [0001] The invention belongs to the field of preparation of fluorescent materials, and in particular relates to a preparation method of a composite fluorescent nanofiber film. Background technique [0002] In recent years, the rapid development of solar cells has brought great changes to the photovoltaic industry. Perovskite materials have become very attractive new stars in the field of material science, and have been used in photodetectors, light-emitting diodes, photocatalysis, laser devices, etc. The field has been widely used, among which, the all-inorganic halide perovskite-based materials (such as CsPbX 3 , X=Cl, Br, I) have been proved to have good prospects in the application of light-emitting devices. [0003] Fluorescent Nanofibrous Membranes (FNMs) and CsPbX 3 Polymer electrospun (E-spun) structures have attracted increasing attention in the past few years. E-spun is generally regarded as one of the easiest methods to prepare large-scale nanofi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D01D5/00
CPCD01D5/003D01D5/0061D04H1/728D10B2505/00
Inventor 郁菁周航王明辉雷风采杨茂森魏义胜
Owner SHANDONG NORMAL UNIV
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