Room temperature phosphorescent material based on phenyl-2-naphthylamine or phenyl-2-naphthylamine and 4,4-dibromodiphenyl composite crystal, and preparation method and application thereof

Abstract

The invention relates to room temperature phosphorescent material based on phenyl-2-naphthylamine or phenyl-2-naphthylamine and 4,4-dibromodiphenyl composite crystal, preparation method of the material, and application of the material in the organic white light material field, safety anti-counterfeiting identification field and other fields, and belongs to the technical field of organic room temperature phosphorescent materials. 2-Naphthylamine is connected with benzene rings or naphthalene rings having different substitutions, this type of molecules is as good as naphthylamine in emitting deep blue light and can also efficiently emit yellow-green phosphorescent light at low temperature. 4,4-Dibromodiphenyl provides, on one hand, heavy atoms for a body so that interstitial crossing rate of objective molecules from single linear state to triple linear state is increased, and avoids, on the other hand, the quenching of the objective molecules due to accumulation, thereby ensuring efficient luminescent efficiency. A white light luminescent material can be prepared by using fluorescent-phosphorescent double emission of the system, and long-life phosphorescent emission is potentially significant to bio-labeling and anti-counterfeiting identification fields.

Description

technical field [0001] The invention belongs to the technical field of organic room-temperature phosphorescent luminescent materials, and specifically relates to a room-temperature phosphorescent material based on phenyl-2-naphthylamine or its derivatives and 4,4-dibromobiphenyl composite crystal, a preparation method and its application in organic white light. Materials, security and anti-counterfeiting identification and other fields of application. Background technique [0002] Compared with traditional fluorescent materials, phosphorescent materials can achieve phosphorescent emission mixed with singlet and triplet state emission through intersystem crossing. The internal quantum efficiency of OLEDs made of phosphorescent materials can reach 100%, and its luminous efficiency can be compared with Fluorescence is tripled. Due to the many advantages of phosphorescent materials, they have shown great application value in the fields of full-color display, white light illumin...

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Problems solved by technology

[0004] However, there are still some problems in these systems, such as the method of crystal design reported by Tang Benzhong and Kim et al. The resulting room temperature phosphorescence system has a relatively short lifetime and low brightness. When the crystal stacking method is destroyed, the room temperature phosphorescence emission will greatly reduce

However, in the doping system proposed by Adachi et al., the low-concentration doping process is difficult to control and the host and guest are easy to cause phase separation.

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