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A kind of organic thin film, preparation method and its application in the preparation of organic electroluminescence device

A technology of organic thin films and organic materials, applied in the field of organic electroluminescence, to achieve the effect of overcoming surface tension and excellent performance

Inactive Publication Date: 2018-01-30
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the film quality of organic films prepared by ultrasonic spraying method still has certain problems, because the optoelectronic devices in these fields have relatively low requirements on film quality, and the optoelectronic devices prepared by ultrasonic spraying technology are currently mainly concentrated in solar cells (S.F.Tedde , J.Kern, T.Sterzl, J.Furst, P.Lugli, O.Hayden, NanoLett.2009, 9, 980), organic transistors (N.A.Azarova, J.W.Owen, C.A.McLellan, M.A.Grimminger, E.K.Chapman, J.E.Anthony, O.D. Jurchescu,Org.Electron.2010,11,1960) and polymer light-emitting devices (K.Gilissen, J.Stryckers, P.Verstappen, J.Drijkoningen, G.Heintges, L.Lutsen, J.Manca, W.Maes, W.Deferme,Org.Electron.2010,20,31) field

Method used

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  • A kind of organic thin film, preparation method and its application in the preparation of organic electroluminescence device
  • A kind of organic thin film, preparation method and its application in the preparation of organic electroluminescence device
  • A kind of organic thin film, preparation method and its application in the preparation of organic electroluminescence device

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Experimental program
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Effect test

Embodiment 1

[0035] PEDOT:PSS film was prepared by ultrasonic spraying technology, and based on it as a hole injection layer, a structure of ITO / PEDOT:PSS / TAPC / TcTa / CBP:Ir(ppy) was prepared 3 / TmPyPhB / LiF / Mg:Ag green organic electroluminescence device, the hole injection layer is prepared by ultrasonic spraying technology, and the preparation of the remaining layers of the device is carried out in a multi-source organic molecule vapor deposition system. The detailed preparation process is as follows:

[0036] (1) The ITO substrate is ultrasonically cleaned with toluene, acetone, ethanol, and deionized water in sequence, and then dried.

[0037] (2) Put the treated ITO substrate on the heating platform, control the substrate temperature at 30°C, place the ultrasonic nozzle at 10cm above the ITO substrate, and feed PEDOT into the nozzle at a rate of 3ml / min: PSS solution (a 3wt% aqueous solution obtained by diluting 19 times the volume of methanol, the 3wt% aqueous solution is from Xi'an Bao...

Embodiment 2

[0042] For comparison, the PEDOT:PSS film prepared by the common spin coating method was used as the hole injection layer, and the same structure was prepared as ITO / PEDOT:PSS / TAPC / TcTa / CBP:Ir(ppy) 3 / TmPyPhB / LiF / Mg: Ag green organic electroluminescent device, except for the hole injection layer, the preparation process of other functional layers of the device is the same as the above device.

[0043] (1) The ITO substrate is ultrasonically cleaned with toluene, acetone, ethanol, and deionized water in sequence, and then dried.

[0044] (2), put the treated ITO substrate on the spin coater, drop 40 microliters of PEDOT:PSS undiluted 3wt% aqueous solution (Xi'an Baolaite Optoelectronics Technology Co., Ltd.), at a speed of 5000 rpm, Rotate for 60 seconds to obtain a PEDOT:PSS film with a thickness of 30nm, and put the sample into a drying oven at 120°C for heating and annealing for 10min.

[0045] (3) Place the annealed substrate in a multi-source organic molecular vapor depos...

Embodiment 3

[0051] On the basis of the PEDOT:PSS hole injection layer prepared by ultrasonic spraying technology, we prepared SPPO1 as the main body and Ir(mppy) by ultrasonic spraying and introducing a surface tension control process. 3 As the light-emitting layer of the guest, the structure is ITO / PEDOT:PSS / SPPO1:Ir(mppy) 3 / BmPyPhB / LiF / Mg:Ag green light organic electroluminescent device, the preparation of the electron transport layer and electrode of the device is carried out in a multi-source organic molecule vapor deposition system, and the detailed preparation process is as follows:

[0052] (1) The ITO substrate was ultrasonically cleaned with toluene, acetone, ethanol, and deionized water in sequence, and then dried.

[0053](2) Put the treated ITO substrate on the heating platform, control the substrate temperature at 30°C, place the ultrasonic nozzle at 10cm above the ITO substrate, and feed PEDOT into the nozzle at a rate of 3ml / min: PSS solution (a 3wt% aqueous solution obta...

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Abstract

The invention discloses an organic thin film, a preparation method and its application in the preparation of an organic electroluminescence device, belonging to the technical field of organic electroluminescence, and the preparation method of an organic thin film. The specific steps include: a solution atomization process; a liquid film formation process; solvent volatilization process; surface tension control process; solid film formation process; finally form a film with a thickness of 10-100nm. The organic thin film prepared by the preparation method can be used as a hole injection layer, a light emitting layer, an electron injection layer or a transport layer in an organic electroluminescent device. The invention proposes to dilute the solution and control the edge of the liquid film by using a low surface tension solvent. The balance of surface tension keeps the liquid film evenly distributed during the solvent volatilization process, overcomes the influence of surface tension, and realizes an organic electroluminescent device with excellent performance on this basis.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescence, and in particular relates to an organic thin film, a preparation method and its application in the preparation of organic electroluminescence devices. Background technique [0002] In the past 30 years, organic electroluminescent technology has continuously made major breakthroughs under the unremitting efforts of scientific researchers in various countries, and has already reached the practical level in various performance indicators (H. Sasabe, J. Kido, J. Mater. Chem. C2013, 1, 1699). The continuous emergence of mobile phones, TVs, VR and other smart devices using organic electroluminescent display panels, as well as lamps such as table lamps and bedroom lamps using organic electroluminescent lighting panels, have announced the beginning of the practical use of organic electroluminescent technology. [0003] However, the higher manufacturing cost still restricts the furthe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/56
CPCH10K71/12H10K50/00H10K71/00
Inventor 谢文法刘士浩张乐天张祥
Owner JILIN UNIV