Patent ID: 7842942

Claim:
An organic semiconducting layer formulation, comprising an organic binder which has a permittivity, ∈, at 1,000 Hz of 3.3 or less; and a polyacene compound of Formula 1 or 8 or an isomer thereof wherein, R 6 and R 13 in the compound of Formula 1 are each independently the same or different and each independently represents: an optionally substituted C 1 -C 40 carbyl or hydrocarbyl group; an optionally substituted C 1 -C 40 alkoxy group; an optionally substituted C 6 -C 40 aryloxy group; an optionally substituted C 7 -C 40 alkylaryloxy group; an optionally substituted C 2 -C 40 alkoxycarbonyl group; an optionally substituted C 7 -C 40 aryloxycarbonyl group; a cyano group (—CN); a carbamoyl group (—C(═O)NH2); a haloformyl group (—C(═O)—X, wherein X represents a halogen atom); a formyl group (—C(═O)—H); an isocyano group; an isocyanate group; a thiocyanate group or a thioisocyanate group; an optionally substituted amino group; a hydroxy group; a nitro group; a CF 3 group; a halogen group; or an optionally substituted silyl group; and R 1 , R 2 , R 3 , R 4 , R 8 , R 9 , R 10 , R 11 , R 15 , R 16 , and R 17 in the compound of Formula 8 are each independently the same or different and each independently represents: H; an optionally substituted C 1 -C 40 carbyl or hydrocarbyl group; an optionally substituted C 1 -C 40 alkoxy group; an optionally substituted C 6 -C 40 aryloxy group; an optionally substituted C 7 -C 40 alkylaryloxy group; an optionally substituted C 2 -C 40 alkoxycarbonyl group; an optionally substituted C 7 -C 40 aryloxycarbonyl group; a cyano group (—CN); a carbamoyl group (—C(═O)NH2); a haloformyl group (—C(═O)—X, wherein X represents a halogen atom); a formyl group (—C(═O)—H); an isocyano group; an isocyanate group; a thiocyanate group or a thioisocyanate group; an optionally substituted amino group; a hydroxy group; a nitro group; a CF 3 group; a halogen group; or an optionally substituted silyl group; and wherein independently each pair of R 1 and R 2 , R 2 and R 3 , R 3 and R 4 , R 8 and R 9 , R 9 and R 10 , R 10 and R 11 , R 15 and R 16 and R 16 and R 17 may be cross-bridged with each other to form a C 4 -C 40 saturated or unsaturated ring, which saturated or unsaturated ring may be intervened by an oxygen atom, a sulphur atom or a group shown by formula: —N(R a )— (wherein R a is a hydrogen atom or a hydrocarbon group), or may optionally be substituted; and A represents Silicon or Germanium.