Compound, display panel and display device

Abstract

The invention provides a compound, a display panel and a display device. The compound is in a structure shown as a formula (I), wherein R1 and R2 refer to electron-donating groups and independently selected from any one of C1-C20 alkyl groups, C3-C20 cycloalkyl groups, C1-C20 alkoxy groups, a phenyl, a biphenyl, a naphthyl, an anthryl, a phenanthryl, an acenaphthylene group, a pyrenyl, a perylenegrouop, a fluorenyl, a spirobifluorene group, a chrysene group, a benzo-phenanthryl, a benzo-anthryl, a fluoranthene group, a pyrene groupo, a furyl, a benzofuryl, a substituted or unsubstituted dibenzofuran group, a substituted or unsubstituted thienyl, a benzothiophene group, a dibenzothiophene group, a phenoxazine group, a phenazinyl, a phenothiazinyl, a thianthrene group, a carbazolyl, an acridinyl and a diarylamine group, and m is selected from an integer range of 1-4. The compound is a material with AIE characteristics and TADF characteristics, triplet-state excitons are converted into singlet-state excitons through a reverse intersystem conversion process to realize radioluminescence, and the exciton utilization rate of luminescent materials is increased.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent materials, in particular to a compound, a display panel and a display device including the compound. Background technique [0002] Among organic electroluminescent materials, the research, preparation and application of red light materials are relatively backward. There are two main reasons for this. First, the energy level of HOMO (highest occupied orbit) and LUMO (lowest unoccupied orbital) of red light materials ) Energy range between energy levels (E g ) is generally small, which makes it difficult to match the energy levels, and the holes and electrons cannot effectively recombine and emit light in the light-emitting layer; The extinguishing phenomenon is serious, which affects its luminous performance. Therefore, the research and preparation of red light materials has become one of the research hotspots in the field of fluorescent materials. [0003] At present, the mai...

AI Technical Summary

Problems solved by technology

However, this type of luminescent dye still has some disadvantages: (1) It is difficult to purify and separate, and the preparation cost is high; (2) The emission wavelength is not ideal, and the emission color is yellowish; (3) There is a serious concentration quenching effect, so it can only be used as an object. The luminescent material realizes red light emission; (4) the absorption spectrum does not overlap well with the luminescence spectrum of host materials such as Alq3

The disadvantage of this method is: due to the increase of the molecular structure, the intramolecular planarity is weakened, and it is easy to produce aggregation-induced fluorescence quenching phenomenon in high concentration or solid film state.

Therefore, it is necessary to develop new luminescent materials to solve the problem of fluorescent quenching induced by the aggregation of luminescent material molecules after the wavelength of the luminescent material is red-shifted in the prior art.

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