A compound of Chemical Formula 1, and an organic photoelectric device, an image sensor, and an electronic device including the same are disclosed:

##STR00001##

In Chemical Formula 1, each substituent is the same as defined in the detailed description.

A thermally activated delayed fluorescent molecular material, a synthesizing method therefor, and an electroluminescent device are provided. The thermally activated delayed fluorescent molecular containing an indenobenzoselenoheteroaromatic ring donor is synthesized, so that an electron donating ability of the donor is increased, and an non-radiative transition rate is effectively inhibited, thereby increasing photo-luminescence quantum yield (PLQY) of the molecule; and increasing the twist angle between the electron donor and the electron acceptor. Meanwhile, electron cloud overlapping between highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) is reduced, thereby obtaining a smaller E.sub.ST value. The organic electroluminescent device adopts the thermally activated delayed fluorescent molecular material prepared according to the synthesizing method, and thus has high luminous efficiency and long service life.

A thermally activated delayed fluorescent molecular material, a synthesizing method therefor, and an electroluminescent device are provided. The thermally activated delayed fluorescent molecular containing an indenobenzoselenoheteroaromatic ring donor is synthesized, so that an electron donating ability of the donor is increased, and an non-radiative transition rate is effectively inhibited, thereby increasing photo-luminescence quantum yield (PLQY) of the molecule; and increasing the twist angle between the electron donor and the electron acceptor. Meanwhile, electron cloud overlapping between highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) is reduced, thereby obtaining a smaller E.sub.ST value. The organic electroluminescent device adopts the thermally activated delayed fluorescent molecular material prepared according to the synthesizing method, and thus has high luminous efficiency and long service life.

The invention relates to the technical field of the herbicides and/or plant growth regulators. Specifically, the invention primarily relates to novel substituted isothiazolopyridones, and compositions comprising said novel substituted isothiazolopyridones. Further, the present invention relates to processes for the preparation said novel substituted isothiazolopyridones and their use as herbicides and/or plant growth regulators.

A heteroaromatic compound which can be used as the fluorescent guest material in the light emitting layer of the organic electroluminescence device is disclosed. The organic electroluminescence device employing the heteroaromatic compound of the present invention can operate under reduced driving voltage, increase current efficiency, and prolong half-life time.

A heteroaromatic compound which can be used as the fluorescent guest material in the light emitting layer of the organic electroluminescence device is disclosed. The organic electroluminescence device employing the heteroaromatic compound of the present invention can operate under reduced driving voltage, increase current efficiency, and prolong half-life time.

In order to provide a naphthobischalcogenadiazole derivative that can be used as an intermediate for producing a naphthobischalcogenadiazole compound into which a fluorine atom has been introduced, the naphthobischalcogenadiazole derivative in accordance with an aspect of the present invention is represented by a formula (I): ##STR00001## where each of A.sup.1 and A.sup.2 is independently an oxygen atom, a sulfur atom, a selenium atom, or a tellurium atom; and each of X.sup.1 and X.sup.2 is independently a hydrogen atom, a halogen atom, a boronic acid group, a boronic acid ester group, a boronic acid diaminonaphthalene amide group, an N-methyliminodiacetic acid boronate group, a trifluoroborate salt group, or a triolborate salt group.

In order to provide a naphthobischalcogenadiazole derivative that can be used as an intermediate for producing a naphthobischalcogenadiazole compound into which a fluorine atom has been introduced, the naphthobischalcogenadiazole derivative in accordance with an aspect of the present invention is represented by a formula (I): ##STR00001## where each of A.sup.1 and A.sup.2 is independently an oxygen atom, a sulfur atom, a selenium atom, or a tellurium atom; and each of X.sup.1 and X.sup.2 is independently a hydrogen atom, a halogen atom, a boronic acid group, a boronic acid ester group, a boronic acid diaminonaphthalene amide group, an N-methyliminodiacetic acid boronate group, a trifluoroborate salt group, or a triolborate salt group.

Novel organic compounds containing aza-dibenzofuran, aza-dibenzothiophene and aza-dibenzoselenophene are disclosed in this application. These compounds improve OLED performance.

Novel organic compounds containing aza-dibenzofuran, aza-dibenzothiophene and aza-dibenzoselenophene are disclosed in this application. These compounds improve OLED performance.