Nippon Steel Chemical & Material Co., Ltd.

Munetomo Inoue

Masashi Tada

Kentaro Hayashi

Yuta Sagara

Atsushi Kawada

Ayaka Terada

Satoshi Ukigai

Provided are a material that achieves higher sensitivity and higher resolution of a photoelectric conversion element for imaging, and a photoelectric conversion element for imaging using the above material. A material for a photoelectric conversion element for imaging, the material having a structure of the following general formula (1), wherein L each independently represents a single bond, an aromatic hydrocarbon group having 6 to 30 carbon atoms, or the like; 'a' represents the number of substitutions, and represents an integer of 1 to 6; Areach independently represents a group represented by the following formula (2); and Areach independently represents an aromatic heterocyclic group having 3 to 30 carbon atoms and containing a nitrogen-containing six-membered cyclic structure, or the like, provided that a group bonded to L is the aromatic heterocyclic group. The ring B represents a heterocyclic ring represented by the formula (2a) and fused with an adjacent ring at any position; “*” in the formula (2) represents a bonding position to L in the formula (1); and X represents O, S, or N—Ar.

Material for photoelectric conversion element for imaging

Provided is a thermally activated delayed fluorescent blue light-emitting organic EL device having high luminous efficiency and a long lifetime. The organic electroluminescent device includes 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 indolocarbazole compound represented by the following general formula (1), which serves as a thermally activated delayed fluorescent light-emitting material, and a carbazole compound serving as a host material, and a substituent Arwith which a N atom in the indolocarbazole ring compound is substituted has at least one fluorine atom.

Organic electroluminescent element

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Tokyo, Japan

Munetomo Inoue