Abstract: An organic electroluminescent device having a light-emitting layer, wherein the light-emitting layer contains a host compound having a boron atom and an oxygen atom in the molecule as a first component, a thermally assisting delayed fluorescent material such that the energy difference ?EST between the excited singlet energy level and the excited triplet energy level is 0.20 eV or less as a second component, and a fluorescent material as a third component, and has a high light emission efficiency.

Abstract: The present invention provides a novel polycyclic aromatic compound having a plurality of aromatic rings linked by a boron atom, a nitrogen atom, and the like, and thus increases the number of alternatives of a material for an organic electroluminescent (EL) device. Furthermore, the present invention provides an excellent organic EL device by using a novel polycyclic aromatic compound as a material for an organic EL device.

Abstract: An organic light-emitting device containing both a compound represented by the following general formula (1) and a compound represented by the following general formula (2) has a high light emission efficiency. The rings a to c each are a benzene ring that can be optionally condensed, R1 and R2 each represent a substituted or unsubstituted aryl group, etc., four of R31 to R35 each are a substituted or unsubstituted carbazol-9-yl group, but all of these four are not the same, and the remaining one is a hydrogen atom, a cyano group, etc.

Abstract: A polycyclic aromatic compound represented by Formula (1) is provided by the invention: wherein A11 ring, A21 ring, A31 ring, B11 ring, B21 ring, C11 ring, and C31 ring are an aryl or heteroaryl ring which may be substituted, Y11, Y21, Y31 are B or the like, X11, X12, X21, X22, X31, X32 are >O or >N—R, R in the above >N—R is an and which may be substituted or the like, R in the above >N—R or the like may be bonded to A11 ring, A21 ring, A31 ring, B11 ring, B21 ring, C11 ring, and/or C31 ring by a linking group or a single bond; and at least one hydrogen in the compound represented by Formula (1) may be replaced with deuterium, cyano, or a halogen.

Abstract: The objective of the invention is to provide a polycyclic aromatic compound in which solubility to a solvent, film formability, wet coatability, thermal stability, and in-plane orientation are improved. This objective is achieved by alight emission layer-forming composition comprising: as a first component, at least one type of dopant material selected from the group consisting of polycyclic aromatic compounds represented by general formula (A) and polycyclic aromatic oligomer compounds including a plurality of structures represented by general formula (A); as a second component, a specific low-molecular-weight host material; and, as a third component, at least one type of organic solvent. In formula (A), ring A, ring B, and ring C each independently represent an aryl ring or a hetero aryl ring, Y1 is B, and X1 and X2 each independently represent O or N—R wherein at least one of X1 and X2 is N—R.

Abstract: A polycyclic aromatic compound represented by general formula (1) described below and having a bulky substituent in a molecule is used as a material for an organic device, whereby, for example, an organic EL device excellent in quantum efficiency can be provided. In particular, concentration quenching can be suppressed even if a use concentration is comparatively high, and therefore the present art is advantageous in a device production process. In formula (1) described above, R1, R3, R4 to R7, R8 to R11 and R12 to R15 are independently hydrogen, aryl or the like, X1 is —O— or >N—R (R is aryl or the like), Z1 and Z2 are a bulky substituent such as aryl, and at least one hydrogen in the compound represented by formula (1) may be replaced by halogen or deuterium.

Abstract: A polycyclic aromatic compound consisting of a substructure represented by Formula (1A) and at least two substructures represented by Formula (1B): (A to C ring is an aryl ring which may be substituted, RXD is an aryl which may be substituted and bonded to A ring via a dashed-line which is —X—, the substructure represented by Formula (1B) is bonded to a ring constituting atom of the aryl or heteroaryl ring in one selected from the group consisting of A ring, B ring and RXD, and C ring and RXE in another substructure represented by Formula (1B) at position *, C ring is bonded to the above-selected ring, RXE is an aryl which may be substituted and bonded to the above-selected ring or X, Y is B, X is >N—R (R is an aryl which may be substituted)) is useful as a material for an organic device.

Abstract: With a light-emission-layer material comprising: a novel polycyclic aromatic compound (1) or a multimer thereof in which a plurality of aromatic rings are linked by a boron atom and a nitrogen atom; and a specific anthracene-based compound (3) that achieves optimum light-emission characteristics in combination with said polycyclic aromatic compound or a multimer thereof, it is possible to provide an organic EL element having optimum light-emission characteristics. Ring A to ring C are an aryl ring or the like, Y1 represents B, X1 and X2 represent N—R, R of the N—R is an aryl or the like, and Ar3 and Ar4 are a hydrogen atom, a phenyl, a group represented by formula (4), or the like.

Abstract: To provide an organic electroluminescent device in which energy efficiency is improved. An organic electroluminescent device includes a pair of electrode layers formed of an anode layer and a cathode layer, and a luminescent layer arranged between the pair of electrode layers, in which the luminescent layer includes a host material and a dopant material, and the dopant material is an anthracene-based compound represented by formula (1), and the luminescent layer further includes a polycyclic aromatic compound represented by formula (2) or a multimer of a polycyclic aromatic compound having a plurality of structures represented by formula (2).

Abstract: By providing a novel polycyclic aromatic compound in which a plurality of aromatic rings are linked via a boron atom, a nitrogen atom, or the like, options of a material for an organic EL element are increased. In addition, by using the novel polycyclic aromatic compound as a material for an organic electroluminescent element, an excellent organic EL element is provided.

Abstract: The present invention relates to a light emitting layer material comprising: a polycyclic aromatic compound (1) in which a plurality of aromatic rings are linked by a boron atom and a oxygen atom or a nitrogen atom; and a specific anthracene-based compound (3) that achieves optimum light-emission characteristics in combination with said polycyclic aromatic compound. With this light emitting layer material having optimum light emitting characteristics, it is possible to provide an excellent organic EL element. Ring A to ring C are an aryl ring or the like, Y1 is B (boron), X1 and X2 are —O— or >N—R (provided that at least one is —O—), X is a group represented by formula (3-X1), (3-X2), or (3-X3), Y is —O—, —S— or >N—R29, R29 is a hydrogen atom or an optionally substituted aryl, Ar1 to Ar4 are phenyl, a group represented by formula (4), or the like, and both Ar1 and Ar3 do not simultaneously represent a phenyl.

Abstract: Provided is an organic electroluminescent element including a light emitting layer containing, as a dopant, at least two compounds selected from a compound group consisting of a polycyclic aromatic compound represented by the following general formula (1) and a multimer thereof: wherein the symbols are defined in the specification.

Abstract: The present invention addresses the problem of providing a polycyclic aromatic compound which has improved solubility in solvents, film formability, wet coatability and in-plane orientation. The above-described problem is solved by a composition for forming a light emitting layer, which contains, as a first component, at least one compound selected from the group consisting of compounds represented by general formula (A-1) and compounds represented by general formula (A-2), as a second component, at least one compound that has a triplet energy (ET) of 1.8-3.0 eV, and as a third component, at least one organic solvent. In the formulae, R represents a hydrogen atom, an aryl group, a heteroaryl group, a diarylamino group, a diheteroarylamino group or an aryl heteroarylamino group.

Abstract: According to the present invention, options for materials for organic devices such as materials for organic EL elements are increased by addition of a cycloalkane, by condensation, to a polycyclic aromatic compound in which a plurality of aromatic rings are linked together by boron atoms, oxygen atoms, and the like. By using a novel cycloalkane-condensed polycyclic aromatic compound as a material for an organic EL element, for example, an organic EL element having excellent emission efficiency and element life is provided.

Abstract: By using a polycyclic aromatic compound as a material for a light-emitting layer, formed by connecting a plurality of aromatic rings with a boron atom and an oxygen, sulfur, or selenium atom, which have been substituted by a specific aryl such as anthracene, an organic EL element having at least one of excellent quantum efficiency and element life can be provided.

Abstract: A production management device, such as a production management computer, determines a production sequence of plural types of substrates in order to produce the substrates consecutively on a product type-by-type basis by using a component mounter including component supply devices. The production management device includes a main control unit for determining a production sequence of substrates such that, where a time from start to completion of off-line setup of all the component supply devices to be used for a single product type of substrate is defined as an off-line setup time, a sum of the off-line setup times for two product types of substrates to be consecutively produced is balanced over an entire period of consecutive production.

Abstract: By providing a novel polycyclic aromatic amino compound having an amino substituent and having a plurality of aromatic rings linked via a boron atom, an oxygen atom, or the like, for example, as in the following formula, a selection range of a material for an organic EL element is widened.

Abstract: An object of the present invention is to provide an organic electroluminescent element having optimal light emitting characteristics. The above problem is solved by an organic electroluminescent element having a light emitting layer containing a compound of formula (1) or a multimer compound having a plurality of structures of formula (1) and a compound of formula (2). (In formula (1), ring A, ring B, and ring C each represent an aryl ring or the like, X1 and X2 each independently represent O or N—R, and the R represents an aryl or the like. In formula (2), R1 to R10 each represent an aryl or the like.

Abstract: By providing a novel polycyclic aromatic compound in which a plurality of aromatic rings is linked via a nitrogen atom, a boron atom, or the like, options of a material for an organic EL element are increased. In addition, by using the novel polycyclic aromatic compound as a material for an organic electroluminescent element, an excellent organic EL element is provided.

Abstract: An organic electroluminescent element includes a light emitting layer containing a polycyclic aromatic compound represented by (1) or its multimer having plural structures represented by (1) and an anthracene-based compound represented by (3). In (1) and (3), rings A to C represent optionally substituted aryl rings or heteroaryl rings, X1 and X2 represent >O, >N—R, >C(—R)2, >S, or >Se, R in >N—R represents aryl etc., R in >C(—R)2 represents hydrogen etc., R in >N—R and/or R in >C(—R)2 may be bonded to ring A, B, and/or C via linking group or single bond, X's and Ar4's represent hydrogen or optionally substituted aryls, not all X's and Ar4's represent hydrogen simultaneously, and at least one hydrogen in compound represented by (1) or (3) may be substituted by halogen etc. In the light emitting layer, concentration of the polycyclic aromatic compound or its multimer changes from a positive electrode layer to a negative electrode layer.