Provided are: a compound that further improves the capability of an organic EL device, an organic electroluminescent device having a further improved device capability, and an electronic device including the organic electroluminescent device. Precisely provided are: a compound represented by the following formula (1A) or formula (1B) (wherein the symbols are as defined in the description), an organic electroluminescent device containing the compound, and an electronic device including the organic electroluminescent device.

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Provided are a compound that further improves the capability of an organic EL device, an organic electroluminescent device having a further improved device capability, and an electronic device including the organic electroluminescent device. Precisely provided are: a compound represented by the following formula (1) (wherein N*, Ar, L, X, *a, *b.sub.1, *b.sub.2, *b.sub.3, m, n, R.sup.11 to R.sup.14, R.sup.15 to R.sup.22, R.sup.31 to R.sup.40, and R.sup.41 to R.sup.48 are as defined in the description), an organic electroluminescent device containing the compound, and an electronic device including the organic electroluminescent device.

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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.

Provided is a blue light emitting organic EL device having high emission efficiency and a long lifetime.

An organic electroluminescent device comprising one or more light emitting layers between an anode and a cathode opposite to each other, wherein at least one of the light emitting layers contains an organic emission material having a difference between excited singlet energy (S1) and excited triplet energy (T1) (ΔEST) of 0.20 eV or less as a light emitting dopant, a first host selected from the compounds represented by the following general formula (1), and a second host selected from the compounds represented by the following general formula (2).

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Provided are a triarylamine derivative and an organic electroluminescent device thereof, which relate to the technical field of organic electroluminescence. The triarylamine derivative has a relatively high triplet energy level, high hole mobility, a high refractive index and good film formability and thermal stability and can effectively reduce the driving voltage of the organic electroluminescent device, improve the luminescence efficiency, and extend the service life of the device when applied to the organic electroluminescent device. The triarylamine derivative has a good application effect and a good industrialization prospect in the organic electroluminescent device.

A compound represented by the following formula (1):

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The R.sup.1 to R.sup.9, L.sup.1 to L.sup.3, and Ar.sup.1 to Ar.sup.2 in the formula (1) are as defined in the description. An organic electroluminescence device contains the compound, and an electronic instrument includes the organic electroluminescence device.

There is provided an organic EL device, including: an anode; a cathode; an emitting layer provided between the anode and the cathode; a first layer provided between the anode and the emitting layer; and a second layer provided between the anode and the first layer, in which the emitting layer contains a delayed fluorescent compound, the first layer contains a first compound, the second layer contains a second compound, an ionization potential Ip(HT1) of the first compound satisfies Numerical Formula 1, a hole mobility μh(HT1) of the first compound satisfies Numerical Formula 2, an ionization potential Ip(HT2) of the second compound satisfies Numerical Formula 3, and the first layer has a film thickness of 15 nm or more,

Ip(HT1)≥5.69 eV  (Numerical Formula 1)

μh(HT1)≥1.00×10.sup.−5 cm.sup.2/Vs  (Numerical Formula 2)

Ip(HT2)≥5.60 eV  (Numerical Formula 3).

A compound may improve the capability of an organic EL device, and an organic electroluminescent device including such compound may have improved capability and may be included in electronic devices. Such compounds may be of formula (1A) or formula (1B) (wherein the symbols are as defined in the description)

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organic electroluminescent device(s) may contain such compound(s), and electronic device(s) may include such organic electroluminescent device(s).

An organoelectroluminescent device according to the present invention is capable of low voltage driving, has an excellent external quantum efficiency and exhibits highly efficient light-emitting characteristics by employing compounds having distinct structures, as a hole transport material and a dopant material, in a hole injection layer or a hole transport layer, and a light-emitting layer, respectively, and thus can be industrially utilized in a flat display device, a flexible display device, a monochrome or white flat panel lighting apparatus, a monochrome or white flexible lighting apparatus and the like.

The present invention relates to a compound represented by formula 1, an organic optoelectronic element comprising the same, and a display device comprising the organic optoeletric element. Formula 1 and the description regarding the samen are as defined in the specification.