The invention relates to novel organic semiconducting compounds containing a polycyclic unit, to methods for their preparation and educts or intermediates used therein, to compositions and formulations containing them, to the use of the compounds and compositions as organic semiconductors in, or for the preparation of, organic electronic (OE) devices, especially organic photovoltaic (OPV) devices, organic photodetectors (OPD), organic field effect transistors (OFET) and organic light emitting diodes (OLED), and to OE devices comprising these compounds or compositions.

The invention relates to novel organic semiconducting compounds containing a polycyclic unit, to methods for their preparation and educts or intermediates used therein, to compositions and formulations containing them, to the use of the compounds and compositions as organic semiconductors in, or for the preparation of, organic electronic (OE) devices, especially organic photovoltaic (OPV) devices, organic photodetectors (OPD), organic field effect transistors (OFET) and organic light emitting diodes (OLED), and to OE devices comprising these compounds or compositions.

The present invention discloses a novel polyheteroaromatic compound derived from 7,7-dimethyl-5,7-dihydrospiro[cyclopenta[1,2-b:5,4-b-dithiophene-4,13-indeno[1,2-b]acridine] core structures. The polyheteroaromatic compound can be used as organic electroluminescence materials for use in an organic electroluminescence device and electronic equipment.

The present invention discloses a novel polyheteroaromatic compound derived from 7,7-dimethyl-5,7-dihydrospiro[cyclopenta[1,2-b:5,4-b-dithiophene-4,13-indeno[1,2-b]acridine] core structures. The polyheteroaromatic compound can be used as organic electroluminescence materials for use in an organic electroluminescence device and electronic equipment.

A method of synthesizing a fused heteroaromatic compound includes obtaining a first intermediate from a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2, obtaining a second intermediate including a ring having a chalcogen element from the first intermediate, and obtaining a fused heteroaromatic compound by a cyclization reaction of the second intermediate.

A method of synthesizing a fused heteroaromatic compound includes obtaining a first intermediate from a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2, obtaining a second intermediate including a ring having a chalcogen element from the first intermediate, and obtaining a fused heteroaromatic compound by a cyclization reaction of the second intermediate.

The invention relates to novel organic semiconducting compounds containing a polycyclic unit, to methods for their preparation and educts or intermediates used therein, to compositions, polymer blends and formulations containing them, to the use of the compounds, compositions and polymer blends as organic semiconductors in, or for the preparation of, organic electronic (OE) devices, especially organic photovoltaic (OPV) devices, perovskite-based solar cell (PSC) devices, organic photodetectors (OPD), organic field effect transistors (OFET) and organic light emitting diodes (OLED), and to OE, OPV, PSC, OPD, OFET and OLED devices comprising these compounds, compositions or polymer blends.

A fused polycyclic heteroaromatic compound represented by Chemical Formula 1A or 1B that has a compact planar structure in which eight or more rings are fused together.

A fused polycyclic heteroaromatic compound represented by Chemical Formula 1A or 1B that has a compact planar structure in which eight or more rings are fused together.

An organic semiconductor element in which an organic semiconductor layer contains a compound of Formula (1), a compound of Formula (2), and/or a compound of Formula (3) or contains a polymer having a structure of any one of formed by Formulae (8) to (10):

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in which X.sup.1 represents a nitrogen atom or CR.sup.a, and rings A to B each represent a specific nitrogen-containing ring; Y.sup.1 represents an oxygen atom, a sulfur atom, CR.sup.b.sub.2, or NR.sup.c; V.sup.1 represents NR.sup.d, an oxygen atom, a sulfur atom, or a selenium atom; R.sup.a to R.sup.d each represent a hydrogen atom or a substituent; R.sup.1 represents a specific substituent, and p is an integer of 0 to 2; n represents 1 or 2; and * represents a bonding site.