Nitrogen-containing heterocyclic compound surrounded by four donor groups, light-emitting material and organic light-emitting element
A technology of nitrogen heterocyclic compounds and luminescent materials, which is applied in the field of luminescent materials and organic light-emitting components, compounds, and nitrogen-containing heterocyclic compounds. It can solve problems such as performance improvement, improve planarity, increase mobility, and slow down aging. Effect
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Embodiment 1
[0054] This embodiment provides a compound 4Cz2py, which is a nitrogen-containing heterocyclic compound surrounded by four donor groups, and its structural formula is as follows:
[0055]
[0056] The toluene solution of compound 4Cz2py was prepared in the glove box, and the emission spectrum and absorption spectrum measured by excitation light were as follows: figure 1 As shown, the two line types in the figure represent the luminescence spectrum and absorption spectrum of 4Cz2Py / Tol respectively; it can be seen that the luminescence peak is at 451nm, indicating that the compound 4Cz2py is a blue-light organic electroluminescent material.
[0057] The compound 4Cz2py was doped into different host materials to measure the photoluminescence spectrum, and the doping amount was 30wt.%. Such as figure 2 As shown, mCP is a hole-transporting host material; DPEPO is an electron-transporting host material. It can be seen that it emits blue light in organic thin films and can be u...
Embodiment 2
[0064] This embodiment proposes a compound 4tBuCz2Py, which is a nitrogen-containing heterocyclic compound surrounded by four donor groups, and its structural formula is as follows:
[0065]
[0066] The toluene solution of the compound 4tBuCz2Py was prepared in the glove box, and the emission spectrum and absorption spectrum measured by the excitation light were as follows: Figure 5 Shown; It can be seen that the luminescent peak is at 468nm, indicating that the compound 4tBuCz2Py is a blue-light organic electroluminescent material.
[0067] The compound 4tBuCz2Py was doped into different host materials to measure the photoluminescence spectrum, the doping concentration was 30wt.%, such as Figure 6 As shown, the photoluminescence spectra of 4tBuCz2Py doped in DPEPO and mCP films, the luminescence peaks are 468nm and 456nm, respectively, which can be used to prepare blue organic electroluminescent devices. 4tBuCz2Py doped in DPEPO and mCP films, the photoluminescence qua...
Embodiment 3
[0073] Any one of the compounds of the above structural formulas I to VI contains a delayed fluorescence material emitting delayed fluorescence, and the organic light-emitting device using this compound as a light-emitting material has the characteristics of emitting delayed fluorescence and high luminous efficiency.
[0074] In the organic electroluminescent element, carriers are injected into the luminescent material from the positive and negative electrodes to generate an excited luminescent material and make it emit light. By using the compound represented by the structural formulas I to VI of the present invention as a light-emitting material of the light-emitting layer, excellent organic light-emitting devices such as organic photoluminescent devices or organic electroluminescent devices can be provided. An organic photoluminescent element has a structure in which at least a light emitting layer is formed on a substrate. In addition, the organic electroluminescent elemen...
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Abstract
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