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Vacuum sublimation purifying method of OLED (organic light emitting diode) material

A purification method and vacuum technology, which is applied in the field of vacuum sublimation purification, can solve the problems of complex operation of the purification method, difficulty in achieving continuous purification, and low efficiency of impurity purification.

Active Publication Date: 2014-04-30
驻马店韵光科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects that the existing OLED material purification method has low purification efficiency for impurities with low sublimation temperature, the purity that can be achieved is limited, and the purification method is complex in operation and difficult to achieve continuous purification. A vacuum sublimation purification method for OLED materials. The invention realizes the purpose of performing multiple sublimation and purification on the material to be purified in one operation by setting a programmed temperature rise mechanism in different temperature zones, and can well control the impurities that have been removed. It will not return to the purified material again, so as to achieve higher purity, and has a good effect on removing impurities whose sublimation temperature is higher than or lower than that of the material to be purified

Method used

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  • Vacuum sublimation purifying method of OLED (organic light emitting diode) material

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Embodiment 1

[0046] Taking CBP as an example, the entire vacuum sublimation purification process is figure 2 The vacuum sublimation purification equipment is carried out in the described vacuum sublimation purification equipment, which mainly includes a quartz outer tube 10 which acts as a vacuum isolation and a quartz inner casing 8 which acts as a deposition chamber, a heating furnace 9, a temperature control system and a vacuum system. The furnace has five controllable temperature zones: the first sub-temperature zone 1, the second sub-temperature zone 2, the third sub-temperature zone 3, the second temperature zone 4 and the third temperature zone 5. The first temperature zone is composed of the first sub-temperature zone 1 , the second sub-temperature zone 2 and the third sub-temperature zone 3 .

[0047] The vacuum sublimation purification method is as follows: open the vacuum chamber door 7, put 1 g of synthetic and chemically purified CBP (purity is 95%) in the quartz boat 6, and ...

Embodiment 2

[0049] Take Alq 3 For example, the entire vacuum sublimation purification process is figure 2 The vacuum sublimation purification equipment is carried out in the described vacuum sublimation purification equipment, which mainly includes a quartz outer tube 10 which acts as a vacuum isolation and a quartz inner casing 8 which acts as a deposition chamber, a heating furnace 9, a temperature control system and a vacuum system. The furnace has five controllable temperature zones: the first sub-temperature zone 1, the second sub-temperature zone 2, the third sub-temperature zone 3, the second temperature zone 4 and the third temperature zone 5. The first temperature zone is composed of the first sub-temperature zone 1 , the second sub-temperature zone 2 and the third sub-temperature zone 3 .

[0050] The vacuum sublimation purification method is as follows: the vacuum chamber door 7 is opened, and the chemically purified Alq 3 (Purity is 98%) 0.98g is put into quartz boat 6, and...

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Abstract

The invention relates to a vacuum sublimation purifying method of OLED (organic light emitting diode). The method comprises the following steps of: placing the crude product of OLED in a first temperature area; heating the first temperature area to the first temperature area heating temperature, and keeping the temperatures of the second and third temperature areas lower than the lowest sublimation temperature of OLED material at the same time, and depositing after sublimation; heating the second temperature area to the second temperature area heating temperature, and keeping the temperatures of the first and third temperature areas at the same time, and further depositing after sublimation; heating the third temperature area to the third temperature area heating temperature, and keeping the temperatures of the first and second temperature areas at the same time, and further depositing after sublimation; reducing the temperatures of all temperature areas; and taking out the deposits on the second temperature area and on the interface area between the second temperature area and the third temperature area. The method provided by the invention can well prevent the removed impurities from returning to the purified material so as to realize higher purity and purifying efficiency; and the method has good effect in removing various impurities, and can realize simple continuous operations.

Description

technical field [0001] The invention relates to a vacuum sublimation purification method for OLED materials. Background technique [0002] Organic Light-Emitting Diode (Organic Lighting-Emitting Diode) is a new type of light-emitting technology. It has the advantages of active light-emitting, short response time, bright colors, no viewing angle problems, and can be made transparent. It has a wide range of applications in the fields of display and lighting. Application prospect. In the field of display, OLED mobile phone screens, MP3, and MP4 screens have been practically used. Unlike traditional LCD display methods, OLED does not require backlights, can be made very thin, has no viewing angle problems, and can significantly save power. It is known as The first choice for next-generation displays. Lighting is another possible main application field of OLED. Compared with incandescent lamps and fluorescent lamps currently used, it can save more power, and it is all solid-sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D7/00
Inventor 张永旭温源李英远
Owner 驻马店韵光科技有限公司
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