A composition may include a compound, a film may include the composition, an organic layer of an organic sensor and/or photoelectric diode may include the compound, and the film, organic sensor, and/or photoelectric diode may be included in an electronic device.

An object of the present invention is to provide a photoelectric conversion element excellent in suppression of a change in an external quantum efficiency during a continuous drive. In addition, an imaging element and an optical sensor related to the photoelectric conversion element are provided. The photoelectric conversion element of the present invention includes a conductive film, a photoelectric conversion film, and a transparent conductive film in this order, contains a first compound that has a maximum absorption wavelength at a wavelength of 500 to 620 nm, and that is a compound represented by Formula (1), and contains a second compound that is different from the first compound and that has a maximum absorption wavelength at a wavelength of 450 to 550 nm.

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The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent device having a low driving voltage and/or a high luminous efficiency and/or a long lifespan can be provided, by comprising an organic electroluminescent compound according to the present disclosure.

An organic electroluminescent device and a display apparatus. The organic electroluminescent device includes a first electrode, a second electrode and at least two organic electroluminescent units located between the first electrode and the second electrode. The at least two organic electroluminescent units are arranged in a stacked manner. The at least two organic electroluminescent units include a first organic electroluminescent unit. The first organic electroluminescent unit includes a first light-emitting layer. The first light-emitting layer contains a first host material, a thermally activated delayed fluorescence sensitizer and a first fluorescent dye.

Provided are a compound capable of improving the luminous efficiency, stability and lifespan of a device employing the same, an organic electronic element employing the same, and an electronic device thereof.

An organic electroluminescence device includes an anode, a cathode, a first emitting layer and a second emitting layer that are interposed between the anode and the cathode and are in a direct contact with each other, and a first electron transporting layer between the cathode and the first emitting layer and the second emitting layer being in a direct contact with each other. The first emitting layer contains a first compound represented by a formula (1) as a first host material, the first compound having at least one group represented by a formula (11). The second emitting layer contains a second compound represented by a formula (2) as a second host material. The first electron transporting layer contains a third compound represented by a formula (3). ##STR00001##

A light-emitting element includes: a first electrode; a second electrode; and a light-emitting layer between the first electrode and the second electrode, wherein the light-emitting layer includes quantum dots and a cyclic organic compound, and at least some of atoms that form a ring of the cyclic organic compound are coordinated to the quantum dots.

A compound for an organic optoelectronic device, a composition for an organic optoelectronic device including the same, an organic optoelectronic device, and a display device, the compound being represented by Chemical Formula 1:

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Provided is a compound of Chemical Formula 1:

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wherein n is 0 or 1, when n is 0, at least one of R1 to R10 is a group of Chemical Formula A, and when n is 1, at least one of R1 to R12 is a group of Chemical Formula A:

##STR00002##

wherein L1 is a direct bond, or a substituted or unsubstituted arylene or heteroarylene group; l1 is an integer of 1 to 5; m is an integer of 1 to 3; when l1 is 2 or greater, the two or more L1s are the same as or different from each other, and an organic light emitting device including the same.

Provided are an organic electronic element including an anode, a cathode, and an organic material layer between the anode and the cathode, and an electronic device including the organic electronic element, wherein the organic material layer includes each of the compounds represented by Formulas 1 and 2 and the driving voltage of the organic electronic element is lowered, and the luminous efficiency and lifetime of the element are improved.