Green-light copolymer material as well as preparation method thereof and organic light-emitting device

A copolymer and green light technology, applied in the direction of luminescent materials, electrical solid devices, electrical components, etc., can solve the problems of complex synthesis and harsh preparation conditions, and achieve the effects of cheap and easy raw materials, improved efficiency, and reduced process flow
CN104017174AInactive Publication Date: 2014-09-03OCEANS KING LIGHTING SCI&TECH CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
OCEANS KING LIGHTING SCI&TECH CO LTD
Publication Date
2014-09-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to an organic light-emitting material, and discloses a green-light copolymer material as well as a preparation method thereof and an organic light-emitting device. The material has a formula shown in the specification, wherein each of R1 and R2 is C1-C20 alkyl, and n is an integer of 10-100. Oxadiazole of the green-light copolymer material provided by the invention is an electron transfer unit, so that charge transfer is facilitated; carbazole has better hole transfer performance; a fluorene derivative is a compound with a rigid planar biphenyl structure, and has higher heat stability; by introducing oxadiazole and carbazole on a fluorene main chain, the defect that polyfluorene carrier transfer is not balanced is relieved, thereby facilitating improving efficiency of the organic light-emitting device.
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Description

technical field

[0001] The invention relates, in particular, to a green light copolymer material and a preparation method thereof. The invention also relates to an organic electroluminescent device using the green light copolymer material as the main material of the light emitting layer. Background technique

[0002] Since 1987, C.W.Tang et al. of Kodak reported for the first time that Alq 3 Since the double-layer device structure of light-emitting materials, organic electroluminescence has received great attention. Organic electroluminescence can be divided into fluorescence and phosphorescence electroluminescence. According to the spin quantum statistical theory, the formation probability ratio of singlet excitons and triplet excitons is 1:3, that is, singlet excitons only account for 25% of the "electron-hole pairs". Therefore, the fluorescence from the radiative transition of singlet excitons only accounts for 25% of the total input energy, while the electroluminescen...

Claims

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