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Organic-inorganic hybrid electroluminescent device and preparation method thereof

An electroluminescent device and inorganic composite technology, which is applied in the fields of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problem of poor stability of organic materials affecting the working life of devices, wide emission spectrum, and hindering the industrialization process of devices, etc. problems, to achieve the effects of easy large-scale production, low preparation cost, and improved electron and hole injection balance

Active Publication Date: 2017-03-22
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inherent defects of organic materials have hindered the industrialization process of related devices, mainly in the following aspects: 1) organic molecules are used as light-emitting materials, and their photons are affected by phonons, so the emission spectrum is wide; 2) the existing organic photoelectric The materials are mainly p-type materials, and n-type materials with high electron mobility are still rare; 3) The poor stability of organic materials affects the working life of devices

Method used

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  • Organic-inorganic hybrid electroluminescent device and preparation method thereof
  • Organic-inorganic hybrid electroluminescent device and preparation method thereof
  • Organic-inorganic hybrid electroluminescent device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Preparation of ZnO seed layer

[0048] Alternately ultrasonically clean the ITO glass substrate with deionized water, acetone, isopropanol, and ethanol, repeat 4 times, dry in vacuum at 80°C for 30 minutes, and irradiate with ultraviolet light for 30 minutes; spin-coat the zinc oxide quantum dot solution on The ITO glass substrate was vacuum-dried at 80°C, taken out after 20 minutes, and lowered to room temperature to complete a cycle; repeat this 3 times. The resulting ZnO seed layer had a thickness of 40 nm.

[0049] (2) Setup of ZnO nanoarrays

[0050] Weigh 0.59 g of zinc nitrate hexahydrate and 0.28 g of hexamethylenetetramine, dissolve them in 40 ml of deionized water respectively, mix the two solutions, stir and mix with magnetic force at room temperature for 20 min, and transfer the mixed solution into the autoclave. Put the substrate loaded with the ZnO seed layer into an autoclave with a filling degree of 80%, and keep the temperature at 90°C for 8 hours...

Embodiment 2

[0058] The steps are basically the same as in Example 1, and only the differences are described as follows:

[0059] 1) Use PET coated with ITO conductive film as the substrate;

[0060] 2) Spin coating with 5g of ZnO quantum dots, 3g of PVK, and 1g of PMMA mixed solution to make an organic-inorganic composite luminescent layer;

[0061] 3) Al is used as the metal anode.

Embodiment 3

[0062] Example 3, the steps are basically the same as in Example 1, except that 1g of ZnO quantum dot powder, 1g of PVK, and 0.5g of PMMA are dissolved in 100g of DMF solution to prepare an organic-inorganic composite light-emitting layer.

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Abstract

The invention discloses an organic-inorganic hybrid electroluminescent device and a preparation method thereof. The organic-inorganic hybrid electroluminescent device comprises a transparent conductive substrate, a ZnO seed crystal layer, a ZnO nanometer array, an organic-inorganic hybrid light emitting layer, an organic hole transportation layer and a metal anode, wherein the transparent conductive substrate, the ZnO seed crystal layer, the ZnO nanometer array, the organic-inorganic hybrid light emitting layer, the organic hole transportation layer and the metal anode are successively arranged from bottom to top. The preparation method comprises the steps of preparing ZnO quantum dot solution according to a solution method, performing spin coating of the ZnO quantum dot solution on the transparent conductive substrate for acquiring a wafer which carries the ZnO seed crystal layer, growing the ZnO nanometer array according to a hydro-thermal method, preparing the organic-inorganic hybrid light emitting layer through the solution method, performing spin coating of the organic hole transportation layer, evaporating the metal anode, and obtaining the organic-inorganic hybrid electroluminescent device. The organic-inorganic hybrid electroluminescent device has advantages of effectively improving electronic and hole injection balance of the device, improving light emitting efficiency of the device and improving stability and service life of the device. The preparation method of the device has advantages of low preparation cost, easy realization of large-area production, and wide application in the electroluminescent device field.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an organic-inorganic composite electroluminescent device and a preparation method thereof. Background technique [0002] Organic materials have the advantages of large chemical variability, easy large-area film formation, wide source of materials, flexible product shapes, and curling. In recent years, optoelectronic devices based on organic materials have been intensively developed. However, the inherent defects of organic materials have hindered the industrialization process of related devices, mainly in the following aspects: 1) organic molecules are used as light-emitting materials, and their photons are affected by phonons, so the emission spectrum is wide; 2) the existing organic photoelectric The materials are mainly p-type materials, and n-type materials with high electron mobility are still rare; 3) The poor stability of organic materials affects the working life of dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56
CPCH10K85/10H10K50/115H10K50/15H10K71/00
Inventor 石少波
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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