Polycyclic aromatic dimeric compound

Abstract

Provided is an excellent polycyclic aromatic dimeric compound which is composed of two partial structures represented by general formula (1) and a linking group L1 that binds the two partial structures to each other, and which is able to be used, for example, as a material for organic EL elements. In formula (1), each of ring A, ring B and ring C is an aryl ring, a heteroaryl ring or the like; Y1is B or the like; each of X1 and X2 is >O or the like; the linking group L1 is a single bond, an arylene group having 6-30 carbon atoms, a heteroarylene group having 2-30 carbon atoms, an alkylene group having 1-24 carbon atoms, an alkenylene group having 1-24 carbon atoms, an alkynylene group having 1-24 carbon atoms, -O-, -S-, >N-R or a combination of these groups; R in the >N-R moiety is an aryl group having 6-16 carbon atoms, a heteroarylene group having 2-20 carbon atoms, an alkyl group having 1-12 carbon atoms or a cycloalkyl group having 3-16 carbon atoms; at least one hydrogen atom inthe linking group L1 may be substituted by an aryl group having 6-16 carbon atoms, a heteroaryl group having 2-20 carbon atoms, an alkyl group having 1-12 carbon atoms or a cycloalkyl group having 3-16 carbon atoms; and at least one hydrogen atom in the dimeric compound may be substituted by a cyano group, a halogen atom or a deuterium atom.

Description

technical field [0001] The invention relates to a polycyclic aromatic dimer compound, an organic electroluminescent element using the same, an organic field effect transistor, an organic thin film solar cell, a display device and an illumination device. Background technique [0002] Conventionally, display devices using light-emitting elements that perform electroluminescence have been studied in various ways because they enable power saving and thinning. Furthermore, organic electroluminescent elements made of organic materials have been actively studied because they can be easily reduced in weight or increased in size. In particular, the development of organic materials having light-emitting properties such as blue, which is one of the three primary colors of light, and the development of organic materials having charge transport capabilities such as holes and electrons (with the possibility of becoming semiconductors or superconductors) Development, so far, regardless of ...

AI Technical Summary

Problems solved by technology

However, the oxidation-reduction stability of the aromatic ring with a small conjugated system is not sufficient, and the life of the device using the molecule having the conventional aromatic ring as the host material is not sufficient.

On the other hand, polycyclic aromatic compounds with extended π-conjugated systems are generally excellent in redox stability, but have low HOMO-LUMO gap (band gap Eg in thin films) or triplet excitation energy (ET), so they are considered not Suitable for main material

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