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

A purification method and vacuum technology, applied in the field of vacuum sublimation purification, can solve the problems of difficult to achieve continuous purification, limited purity, complicated operation of the purification method, etc.

Active Publication Date: 2012-07-04
驻马店韵光科技有限公司
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  • Abstract
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AI Technical Summary

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

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  • Vacuum sublimation purifying method of OLED (organic light emitting diode) material
  • 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 In the described vacuum sublimation purification equipment, the equipment mainly includes a quartz outer tube 10 that acts as a vacuum isolation and a quartz inner sleeve 8 that 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 zone 1, the second sub zone 2, the third sub zone 3, the second zone 4 and the third 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 synthesized and chemically purified CBP (purity of 95%) into the quartz boat 6, and put the quartz boat 6 into the corresponding first sub-temperature zone In the quartz sleeve 8 at position 1, ...

Embodiment 2

[0049] with Alq 3 For example, the entire vacuum sublimation purification process is figure 2 In the described vacuum sublimation purification equipment, the equipment mainly includes a quartz outer tube 10 that acts as a vacuum isolation and a quartz inner sleeve 8 that 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 zone 1, the second sub zone 2, the third sub zone 3, the second zone 4 and the third 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: open the vacuum chamber door 7, put the chemically purified Alq 3 (Purity is 98%) 0.98g is put into the quartz boat 6, the quartz boat 6 is put into the quartz sleeve 8 corresponding to the position of the first sub-temperature zone 1, an...

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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 Lighting-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 problem, and can be made transparent. It is widely used in display and lighting fields. application prospects. In the field of display, OLED mobile phone screens, MP3, and MP4 screens have been practically applied. Unlike traditional LCD display methods, OLED does not require backlight, can be made very thin, has no viewing angle problem, and can significantly save power. It is known as The first choice for next-generation monitors. Lighting is another possible main application area of ​​OLED. Compared with the currently used incandescent lamps and fluorescent lamps, it can save more power, and it is an all-solid-state lighting t...

Claims

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Application Information

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Patent Type & Authority Applications(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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