The present disclosure relates to a boron compound applicable to an organic light-emitting diode and an organic light-emitting diode comprising same. More specifically, the present disclosure relates to a boron compound represented by any one of Chemical Formulas A to D and an organic light-emitting diode comprising same, wherein Chemical Formulas A to D are as defined in the description.

The present invention provides an organic thin film that imparts an excellent electron injection property and an excellent electron transport property when it is used as an electron injection layer of an organic EL device, a coating composition suitable for producing the organic thin film, and an organic EL device material for the organic thin film and the coating composition. The present invention provides an organic thin film, which is a single film containing a first material which is a compound having a structure of the following formula (1) and a second material which transports electrons or a laminate film including a film containing the first material and a film containing the second material,

##STR00001##

wherein X.sup.1 and X.sup.2 are the same as or different from each other and are each a nitrogen atom optionally having a substituent group, an oxygen atom optionally having a substituent group, a sulfur atom optionally having a substituent group, or a divalent linking group optionally having a substituent group; L is a direct bond or a linking group having a valence of p; n is a number of 0 or 1; p is a number of 1 to 4; q is a number of 0 or 1, with q being 0 when p is 1; R.sup.1 to R.sup.3 are the same as or different from each other and are each a monovalent substituent; and m.sup.1 to m.sup.3 are the same as or different from each other and are each a number of 0 to 3.

Provided is an organic light emitting device including a light emitting layer comprising a compound of Chemical Formula 1 and a first organic material layer comprising a compound of Chemical Formula 2:

##STR00001## wherein: Cy1 to Cy5 are each independently one selected from among a substituted or unsubstituted: aromatic hydrocarbon ring, aliphatic hydrocarbon ring, and aromatic hetero ring, or a ring in which two or more rings selected from the above group are fused, one or more of Cy1 to Cy5 are a ring of Chemical Formula 1-A:

##STR00002## one to three of a* to d* are a position fused to or linked to Chemical Formula 1;

##STR00003## L1 to L3 are each independently a direct bond or a substituted or unsubstituted: arylene or divalent heterocyclic group; and Ar1 and Ar2 are each independently a substituted or unsubstituted: aryl or heterocyclic group.

A compound of formula (1)

##STR00001##

wherein X.sub.1 is CR.sub.1 or a nitrogen atom, X.sub.2 is CR.sub.2 or a nitrogen atom, X.sub.3 is CR.sub.3 or a nitrogen atom, X.sub.4 is CR.sub.4 or a nitrogen atom, X.sub.5 is CR.sub.5 or a nitrogen atom, X.sub.6 is CR.sub.6 or a nitrogen atom, X.sub.7 is CR.sub.7, a nitrogen atom, or a carbon atom single-bonded to X.sub.8, X.sub.8 is CR.sub.8, a nitrogen atom, or a carbon atom single-bonded to X.sub.7, X.sub.9 is CR.sub.9 or a nitrogen atom, X.sub.10 is CR.sub.10 or a nitrogen atom, X.sub.11 is CR.sub.11 or a nitrogen atom, X.sub.12 is CR.sub.12 or a nitrogen atom, and Q is CR.sub.Q or a nitrogen atom, and Y is NR.sub.Y1, an oxygen atom, a sulfur atom, C(R.sub.Y2)(R.sub.Y3) or Si(R.sub.Y4)(R.sub.Y5), each R being a hydrogen atom or a substituent.

A compound of formula (11) to (13)

##STR00001##

wherein R.sub.1 to R.sub.4 are each independently D.sub.1 of a formula (1-1) etc. or D.sub.2 of a formula (2-1) etc.

##STR00002##

at least one of R.sub.1 to R.sub.4 being D.sub.1, and at least one of R.sub.1 to R.sub.4 being D.sub.2. In (1-1) and (2-1), X.sub.1 is O or S, R.sub.101 to R.sub.110 and R.sub.161 to R.sub.168 are each independently H, a substituent etc. In at least one D.sub.1, at least one of R.sub.101 to R.sub.110 is a group of a formula (110) or (120):

##STR00003##

Z.sub.1 is a C etc., a ring (B) is an aromatic hydrocarbon ring etc., Y.sub.12 to Y.sub.14 are each independently CR.sub.10A etc., Y.sub.21 to Y.sub.24 are each independently CR.sub.20A etc., Z.sub.2 is an aryl group etc., and * is a bonding position.

An organic electroluminescence device includes: an anode; an emitting layer; and a cathode, the emitting layer containing a first material, a second material and a third material, the first material being a fluorescent material, the second material being a delayed fluorescent material, the third material having a singlet energy larger than a singlet energy of the second material.

The present invention provides a photoelectric conversion element having excellent heat resistance. In addition, the present invention provides an optical sensor and an imaging element including the photoelectric conversion element. In addition, the present invention provides a compound applied to the photoelectric conversion element. The photoelectric conversion element according to the embodiment of the present invention including a conductive film, a photoelectric conversion film, and a transparent conductive film, in this order, in which the photoelectric conversion film contains a compound represented by Formula (1) or (2). ##STR00001##

Provided is a compound of Chemical Formula 1: ##STR00001## where A and B each independently is a substituted or unsubstituted aryl group, a substituted or unsubstituted monocyclic or dicyclic heteroaryl group, a substituted or unsubstituted dibenzofuran group, a substituted or unsubstituted benzonaphthofuran group, a substituted or unsubstituted dibenzothiophene group, a substituted or unsubstituted benzonaphthothiophene group, a substituted or unsubstituted phenoxazine group, a substituted or unsubstituted phenothiazine group, a substituted or unsubstituted phenanthroline group, a substituted or unsubstituted benzoquinoline group, a substituted or unsubstituted arylamine group, a substituted or unsubstituted silyl group, or a substituted or unsubstituted phosphine oxide group, or one of the following substituents: ##STR00002## and an organic light emitting device including the same.

Provided are an organic electric element comprising as a phosphorescent host material, a mixture of the compounds of Formula (1) and Formula (2), and an organic electronic device or apparatus thereof for achieving a high luminous efficiency, a low driving voltage, and an improved lifespan.

A first photoelectric conversion element according to an embodiment of the present disclosure includes: a first electrode; a second electrode that is disposed to be opposed to the first electrode; and a photoelectric conversion layer that is provided between the first electrode and the second electrode. The photoelectric conversion layer includes a fullerene C.sub.60 or a fullerene C.sub.70 as a first organic semiconductor material and a second organic semiconductor material having an ionization potential of 0 or more and 5.0 eV or less.