Perovskite ink for electrofluid ink-jet printing multi-color light-emitting display and preparation method of perovskite ink

An inkjet printing and luminescent display technology, which is applied in the fields of ink, applications, household appliances, etc., can solve the problems of complex preparation process, environmental pollution, waste of raw materials, etc., and achieve the effect of simple preparation process and low solvent volatility

Inactive Publication Date: 2020-01-03
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing technologies use the process of synthesizing quantum dots to prepare perovskite luminescent materials with continuously adjustable bandgap, but the preparation process of the solution method technical scheme is complicated, requires the use of toxic solvents, pollutes the environment, and wastes raw materials; at the same time, perovskite quantum Dots can only be dispersed in a few low-boiling point solvents, such as n-octane, n-hexane, chloroform, etc. The boiling point of these solvents is often not higher than 180 ° C, and low-boiling point solvents are difficult to achieve electrofluid inkjet printing

Method used

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  • Perovskite ink for electrofluid ink-jet printing multi-color light-emitting display and preparation method of perovskite ink
  • Perovskite ink for electrofluid ink-jet printing multi-color light-emitting display and preparation method of perovskite ink
  • Perovskite ink for electrofluid ink-jet printing multi-color light-emitting display and preparation method of perovskite ink

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preparation example Construction

[0029] like figure 1 As shown, the preparation method of the perovskite ink used in electrofluid inkjet printing and colorful light-emitting display in the present invention generally includes the following steps:

[0030] (1) Provide the raw material and solvent of perovskite, and disperse the raw material of perovskite in the solvent to obtain a perovskite solution.

[0031] Specifically, the perovskite raw materials are CsX, PbX 2 salt, the perovskite material has the general formula CsPbX 3 , where X is one of Cl, Br, and I or a mixture of any two, and the band gap of the obtained perovskite is continuously adjustable, which can realize the adjustment of different luminescent colors.

[0032] These perovskite materials have quantum effects to have better light-emitting properties.

[0033] The solvent contains high-boiling point organic solvents, such as one or more sulfur-containing organic compounds; the solvent can be all high-boiling point organic solvents, or a mixed...

Embodiment 1

[0042] by figure 1 CsPbBr in 2 The preparation of I ink is an example: the CsI of 0.25mM and the PbBr of 0.25mM 2 Dissolve in 1 mL of DMSO:DMF in a mixed solvent with a volume ratio of 7:3 (the volume percentage of DMSO in this mixed solvent is 70%; of course, other mixed solvents with a volume percentage of DMSO greater than or equal to 50% can also be used, or pure DMSO), add 40wt% PEABr (the amount of PEABr can be from 10-50wt%), add 0.1wt% crown ether (the amount of crown ether can be from 0.01wt%-0.2wt%); the solution is stirred at 80°C for 2h , to get CsPbBr 2 I ink.

Embodiment 2

[0044] Adopt the CsPbBr prepared in embodiment 1 2 I ink is an apple tree dot matrix printed by electrojet printing technology. By optimizing the parameters of electrojet printing, it can accurately print luminous apple trees. Here, we selected the voltage to be 1000V, the amplitude to be 600V, the duty cycle to be 50% and the frequency to be 100Hz to achieve high-precision printing.

[0045] Of course, the electrofluid jet printing process applicable to the perovskite ink of the present invention can also adopt other parameter settings. In the process of electrofluid jet printing, there are mainly four parameters that can adjust the printing effect, namely, voltage, amplitude, duty cycle and frequency. Using the mutual coordination of these four parameters, high-quality dot matrix can be printed. The present invention can optimize the voltage control to 800V-1000V, the amplitude control to 500V-800V, the duty cycle control to 10%-90%, and the frequency control to 10Hz-100Hz....

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Abstract

The invention belongs to the technical field of light-emitting display, and discloses perovskite ink for electrofluid ink-jet printing multi-color light-emitting display and a preparation method of perovskite ink. The preparation method comprises the following steps: (1) weighing cesium salt CsX and lead salt PbX2 according to a nominal chemical dose ratio of perovskite CsPbX3, and dissolving thecesium salt CsX and the lead salt PbX2 into a solvent to obtain a perovskite solution, wherein X is one or a mixture of any two of Cl, Br and I, the solvent comprises a high-boiling-point organic solvent of which the boiling point is greater than 180 DEG C; and (2) adding an organic matter into the perovskite solution to adjust the surface tension and viscosity of the solution to obtain the perovskite ink for electrofluid ink-jet printing. By improving the composition of the ink, the composition and proportion of each raw material and reagent adopted by the corresponding preparation method andthe like, the prepared perovskite ink for electrofluid ink-jet printing can meet the requirements of electrofluid ink-jet printing, and can be used for realizing an electrofluid ink-jet printing modeof a perovskite light-emitting display layer.

Description

technical field [0001] The invention belongs to the technical field of luminescent display, and more specifically relates to a perovskite ink for electrofluid inkjet printing and a multicolor luminescent display and a preparation method thereof. Background technique [0002] Due to the excellent photoelectric properties of perovskite materials, the quantum dot materials of this system exhibit ultra-high photoluminescence efficiency (>90%), continuous tuning of the spectrum in the visible range, high carrier mobility and absorption coefficient It has been widely studied, especially its narrow half-peak width (<30nm) of the luminescence spectrum is a unique advantage; at the same time, the manufacturing cost of perovskite-based LEDs is lower, and it can emit higher-purity light and can be processed at low cost. And other characteristics, making perovskite materials become one of the most competitive semiconductor materials in the field of light emission, showing good app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/36C09D11/38C09D11/40
CPCC09D11/36C09D11/38C09D11/40
Inventor 唐江朱孟花高亮牛广达
Owner HUAZHONG UNIV OF SCI & TECH
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