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Method for preparing large-area patterned organic light-emitting film by printing

A light-emitting thin film, patterning technology, applied in the directions of copying/marking methods, printing, etc., can solve the problems of poor film quality and inkjet instability, achieve low cost, improve film quality, and overcome the effects of agglomeration

Active Publication Date: 2018-05-15
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem: In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a method for printing and forming a film, specifically a method for printing and preparing a large-area patterned organic light-emitting film using inkjet printing technology, which solves the problem of organic light-emitting films in the printing process. Inkjet instability and poor film quality of molecular luminescent materials

Method used

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  • Method for preparing large-area patterned organic light-emitting film by printing
  • Method for preparing large-area patterned organic light-emitting film by printing
  • Method for preparing large-area patterned organic light-emitting film by printing

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Experimental program
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Effect test

Embodiment 1

[0031] Select the amphiphilic conjugated molecular material PFP-3 as the solute, the structure is as follows figure 1 shown. Weigh 10 mg of PFP-3 and place it in a container, then weigh 2 ml of the first solvent cyclohexanone and add it to the container to form a mixed solution, then weigh 0.2 ml of the second solvent methylpyrrolidinium and put it into the above In the mixed solution, ultrasonication was performed for 30 minutes at room temperature to obtain a small molecule luminescent material ink suitable for inkjet printing.

Embodiment 2

[0033] First weigh 10 mg of solute PFP-3 and place it in the container, then weigh 2 ml of the first solvent cyclohexanone and add it to the container to form a mixed solution, then weigh 0.2 ml of the second solvent and put it into the above mixed solution , ultrasonicated for 30 minutes at room temperature to obtain a small molecule luminescent material ink suitable for inkjet printing. figure 2 It is to compare the influence of different second solvents on the film-forming properties of small organic molecules in inkjet printing, figure 2 (a) the second solvent employed is methylpyrrolidinium, figure 2 (b) the second solvent employed is phenylcyclohexane, figure 2 (c) The second solvent used is dichlorotoluene. It can be seen from the figure that methylpyrrolidinium is used as the second solvent, which effectively suppresses the coffee ring effect and obtains a relatively uniform printing film.

Embodiment 3

[0035] On the basis of implementation case 2, the optimized organic small molecule ink formula cyclohexanone / methylpyrrolidinium was used. Using glass as the substrate, prepare four different substrate surfaces: ITO surface, ITO surface treated with oxygen plasma, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid ) PEDOT-PSS surface and oxygen plasma-treated poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) PEDOT-PSS surface, on which organic small molecule materials were printed, respectively. image 3 (a) using an indium tin oxide surface, image 3 (b) the surface of indium tin oxide treated with oxygen plasma, image 3 (c) using poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) PEDOT-PSS surface, image 3 (d) Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) PEDOT-PSS surface treated with oxygen plasma. It can be seen from the figure that the surface tension of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) PEDOT-PSS is...

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Abstract

The invention provides a method for preparing a film by printing, in particular to a method for preparing a large-area patterned organic light-emitting film by printing by adopting an ink-jet technology. According to the method, the problem that an organic small-molecular light-emitting material is unstable in ink jet and poor in film-forming quality in the printing process is solved. The method belongs to the technical field of printing electronics and application thereof. The method comprises the following steps that at the room temperature, according to the steps of ink edge flow inhabitation by a double-solvent system, small molecular light emitting material distribution control by substrate surface treatment, small molecular light emitting material agglomeration control by ink dryingregulation and the like, the high-quality large-area patterned organic small-molecule light-emitting film is obtained. The method has the advantages that the large-area patterned organic micro-molecule light-emitting film prepared by the method has the good surface morphology and uniform film distribution, and high-quality printing and preparation of high-efficiency large-area organic photoelectric devices can be realized.

Description

technical field [0001] The invention relates to a method for printing and forming a film, in particular to a method for printing and preparing a large-area patterned organic small molecule luminescent film by using inkjet printing technology, and belongs to the technical field of printed electronics and its application. Background technique [0002] Solution processing is the fundamental way to commercialize organic optoelectronic devices at low cost. In the process of preparing organic optoelectronic devices by solution method, inkjet printing technology saves materials due to its non-contact, maskless, large-area preparation, and controllable film thickness. and other characteristics have received extensive attention in the industry. For organic photoelectric devices with layered structures, the film quality of inkjet printed organic functional layers is crucial to device performance. There are many factors that affect the film quality of inkjet printing, such as the surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/00B41M5/035
CPCB41M5/0011B41M5/0047B41M5/0356
Inventor 赖文勇周璐杨雷俞梦捷黄维
Owner NANJING UNIV OF POSTS & TELECOMM
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