29-05-2024 дата публикации
Номер: GB2624714A
A compound of formula (I): A1-(B1)x1-(D1)y1-(B1)x2-A1; or a compound of formula (II): A1-(B2)x5-(D2)y2-(B3)x3-A2-(B3)x4-(D3)y3-(B2)x6-A1 is provided; wherein A2 is a divalent heteroaromatic electron-accepting group; D1, D2 and D3 are independently electron-donating groups; B1, B2, and B3 are independently bridging groups; x1-x6 are independently 0, 1, 2 or 3; y1, y2 and y3 are each independently at least 1; and A1 is independently a group of formula (III): wherein: R10 is H or a substituent; G is SO or SO2; ArA is optionally present; and each of RA, RB, RC, and RD are independently H or a substituent with the proviso that at least one of least one of RA, RB, RC, and RD is CN in the case where ArA is absent. A composition comprising an electron-donating material and the compound of Formula (I) or (II) as an electron-accepting material is provided. An organic electronic device comprising the compound or composition as an active layer is provided. The organic electronic device may be an organic photoresponsive device. The moiety formula (III) may be a 2(-2-methylene-1,1-dioxidothieno[2,3-b]quinoxalin-3(2H)-ylidene)malononitrile or 3-(dicyanomethylene)-2-methylene-2,3-dihydrobenzo[b]thiophene-5,6-dicarbonitrile 1,1-dioxide moiety.
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