Preparation and application of an organic-inorganic perovskite spike crystal

A technology of inorganic calcium and titanium ore, applied in the direction of crystal growth, single crystal growth, single crystal growth, etc., can solve the problem of difficult electron emission cathode, and achieve the effect of stable threshold field strength, low turn-on electric field, and stable emission

Active Publication Date: 2018-06-15
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, few people pay attention to its application in field emission display. A large part of the reason is that the perovskite grown by the previous process is thin film, linear, and single crystal structure, which is difficult to be used as a field electron emission cathode.

Method used

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  • Preparation and application of an organic-inorganic perovskite spike crystal
  • Preparation and application of an organic-inorganic perovskite spike crystal
  • Preparation and application of an organic-inorganic perovskite spike crystal

Examples

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Embodiment 1

[0026] A method for preparing an organic-inorganic perovskite spike crystal, the specific steps are:

[0027] In the first step, an appropriate amount of CH 3 NH 3 I and PbI 2 The powder is dissolved in DMF solution to form a concentration of 50wt% concentrated solution; CH 3 NH 3 I and PbI 2 The molar ratio is 1:1; heating at 70°C for 12 hours under a nitrogen atmosphere to fully dissolve;

[0028] In the second step, a substrate 100 with electrodes 110 is provided, such as figure 2 As shown; the sputtered conductive glass with indium tin oxide is selected as the substrate electrode; in the atmospheric environment, it is sequentially ultrasonically cleaned by acetone, alcohol, and deionized water, and dried to obtain a clean conductive glass substrate of indium tin oxide;

[0029] In the third step, at room temperature, the perovskite solution prepared in the first step is scraped on the conductive glass substrate at a speed of 5 mm / s, and the wet thickness of the film...

Embodiment 2

[0034] A method for preparing an organic-inorganic perovskite spike crystal, the specific steps are:

[0035] In the first step, an appropriate amount of CH 3 NH 3 I and PbI 2 The powder is dissolved in DMF solution to form a concentration of 50wt% concentrated solution; CH 3 NH 3 I and PbI 2 The molar ratio is 1:1; heating at 70°C for 12 hours under a nitrogen atmosphere to fully dissolve;

[0036] In the second step, a substrate 100 with electrodes 110 is provided, such as figure 2 As shown; the sputtered conductive glass with indium tin oxide is selected as the substrate electrode; in the atmospheric environment, it is cleaned by acetone, alcohol, and deionized water in sequence, and dried to obtain a clean conductive glass of indium tin oxide;

[0037] The third step, at room temperature, scrape the poor solvent chlorobenzene on the conductive glass;

[0038] The fourth step is to uniformly drop-coat the perovskite solution prepared in the first step on the poor so...

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Abstract

The invention relates to the technical field of electronic materials, specifically to preparation and application of an organic-inorganic perovskite peak crystal. The preparation comprises the following concrete steps: dissolving a proper amount of a perovskite precursor in an organic solvent to form an organic-inorganic perovskite heterocomplex solution with a concentration of 30 to 60 wt%; spreading the solution on the surface of a substrate with a conductive electrode so as to form a film and allowing a perovskite solution to be rapidly precipitated by using an adverse solvent; and carrying out heating to remove an unwanted organic solvent so as to allow perovskite to be fully crystallized and peak crystal to be formed. The peak crystal can be used for field-induced electron-emission negative electrode materials. The method can realize large-scale low-cost preparation of perovskite field-emission negative electrodes with a low turn-on field, a strong threshold field and stable emission, and is simple, suitable for large-scale preparation and in favor of industrial batch production.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to the preparation and application of an organic-inorganic perovskite spike crystal. Background technique [0002] Field emission display (FED) is that under the action of a strong electric field, the potential barrier on the surface of the cathode is reduced and thinned, and electrons pass through the potential barrier through the tunnel effect and are emitted into a vacuum, and the electrons are accelerated and bombarded on the phosphor to achieve display. Field emission display technology is an extension of cathode ray tube (CRT) technology. It has the advantages of wide viewing angle, bright colors, fast response speed, resistance to harsh high and low temperatures, vibration and shock resistance, and minimal electromagnetic radiation. The core component of the FED display is the field emission cold cathode array, in which the cathode material determines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/62C30B7/08
CPCC30B7/08C30B29/62
Inventor 李福山刘洋郭太良徐中炜郑聪秀陈伟
Owner FUZHOU UNIV
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