wherein the at least one light emitting layer consists of an organic molecule comprising a structure of Formula I and a host material whose triplet (T1) and singlet (S1) energy levels are energetically higher than the triplet (T1) and singlet (S1) energy levels of the organic molecule,

wherein the organic molecule is a luminescent emitter,

wherein the at least one light emitting layer comprises no additional emitter material:

wherein

X=CN or CF₃;

D=a chemical unit comprising a structure of Formula 1-1:

wherein

#=an attachment point of the unit of Formula I-1 to a central phenyl ring of the structure of Formula I;

A and B=independently of one another are selected from the group consisting of CRR¹, CR, NR, and N, there being a single or double bond between A and B and a single or double bond between B and Z;

Z=a direct bond or a divalent organic bridge which is a substituted or unsubstituted C₁ to C₉-alkylene, C₂ to C₈-alkenylene, C₂ to C₈-alkynylene or arylene group or a combination thereof,

—C(Me)₂, —C═CRR¹, C═NR, —NR—, —O—, —SiRR¹—, —S—, —S(O)—, —S(O)₂—, O-interrupted substituted or unsubstituted C₁ to C₉-alkylene, C₂ to C₈-alkenylene, C₂ to C₈-alkynylene or arylene group, phenyl units or substituted phenyl units;

where each R and R¹, identically or differently at each occurrence, is H, deuterium, azide (N₃⁻), F, Cl, Br, I, N(R²)₂, CN, CF₃, NO₂, OH, COOH, COOR², CO (NR²)², Si(R²)₃, B(OR²)₂, C(═O) R², P(═O)(R²)₂, S(═O)R², S(═O)₂R², OSO₂R², a linear alkyl, alkoxy or thioalkoxy group having 1 to 40 carbon atoms or a linear alkenyl or alkynyl group having 2 to 40 carbon atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group having 3 to 40 carbon atoms, which in each case may be substituted by one or more radicals R², it being possible for one or more non-adjacent CH₂ groups to be replaced by R²C═CR², C≡C, Si(R²)₂, Ge(R²)₂, Sn(R²)₂, C═O, C═S, C═Se, C═NR², P(═O)(R²), SO, SO₂, NR², O, S or CONR², and it being possible for one or more H atoms to be replaced by deuterium, F, Cl, Br, I, CN, CF₃ or NO₂, or is an aromatic hydrocarbon ring system having 6 to 60 aromatic ring atoms optionally substituted by one or more radicals R² or a heteroaromatic ring system having 5 to 60 aromatic ring atoms, or is an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms, wherein the aryloxy or the heteroaryloxy group is optionally substituted by one or more radicals R², or is a diarylamino group, diheteroarylamino group or arylheteroarylamino group having 10 to 40 aromatic ring atoms, wherein the diarylamino group, the diheteroarylamino group or the arylheteroarylamino is optionally substituted by one or more radicals R², or is a combination of these systems, or is a crosslinkable unit QE which may be crosslinked by acid-catalytic, thermal or UV crosslinking methods in the presence or absence of a photoinitiator or by microwave radiation; optionally two or more of these substituents R and R¹ may form with one another a mono-or polycyclic, aliphatic, aromatic and/or benzo-fused ring system, wherein, when any R combines to form a carbazole group bonded to Formula I-1, the carbazole group is bonded to Formula I-1 through the nitrogen atom of the carbazole group;

R², identically or differently at each occurrence, is H, deuterium, F, Cl, Br, I, N(R³)₂, CN, CF₃, NO₂, OH, COOH, COOR³, CO(NR³)₂, Si(R³)₃, B(OR³)₂, C(═O)R³, P(═O)(R³)₂, S(═O)R³, S(═O)₂R³, OSO₂R³, a linear alkyl, alkoxy or thioalkoxy group having 1 to 40 carbon atoms or a linear alkenyl or alkynyl group having 2 to 40 carbon atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, which may be substituted in each case by one or more radicals R³, it being possible for one or more non-adjacent CH₂ groups to be replaced by R³C═CR³, C≡C, Si(R³)₂, Ge(R³)₂, Sn(R³)₂, C═O, C═S, C═Se, C═NR³, P(═O)(R³), SO, SO₂, NR³, O, S or CONR³, and it being possible for one or more H atoms to be replaced by deuterium, F, Cl, Br, I, CN, CF₃ or NO₂, or is an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, wherein the aromatic or the heteroaromatic ring system is optionally substituted in each case by one or more radicals R³, or is an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms, wherein the aryloxy or the heteroaryloxy group is optionally substituted by one or more radicals R³, or is a diarylamino group, diheteroarylamino group or arylheteroarylamino group having 10 to 40 aromatic ring atoms, wherein the diarylamino group, the diheteroarylamino group or the arylheteroarylamino is optionally substituted by one or more radicals R³, or is a combination of these systems; where optionally two or more of these substituents R² form with one another a mono-or polycyclic, aliphatic, aromatic and/or benzo-fused ring system;

R³, identically or differently at each occurrence, is H, deuterium, F, CF₃ or an aliphatic, aromatic and/or heteroaromatic radical having 1 to 20 C atoms, in which also one or more H atoms may be replaced by F or CF₃; where optionally two or more substituents R³ form with one another a mono-or polycyclic, aliphatic ring system;

R′=selected from the group consisting of H, N (R⁴)₂, OR⁴, thiophene, a linear alkyl or alkoxy group having 1 to 40 C atoms and a branched or cyclic alkyl or alkoxy group having 3 to 40 carbon atoms, it being possible for this group to be substituted in each case by one or more radicals R⁴, and an aromatic hydrocarbon ring system having 6 to 60 aromatic ring atoms, wherein the aromatic ring system is optionally substituted in each case by one or more radicals R⁴;

R″=selected from the group consisting of N(R⁴)₂, OR⁴, thiophene, a linear alkyl or alkoxy group having 1 to 40 C atoms and a branched or cyclic alkyl or alkoxy group having 3 to 40 carbon atoms, it being possible for this group to be substituted in each case by one or more radicals R⁴, and an aromatic hydrocarbon ring system having 6 to 60 aromatic ring atoms, wherein the aromatic ring system is optionally substituted by one or more radicals R⁴:

R⁴, identically or differently at each occurrence, is H, deuterium, N(R⁵)₂, Si(R⁵)₃, a linear alkyl, alkoxy or thioalkoxy group having 1 to 40 carbon atoms or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 carbon atoms, it being possible for this group to be substituted in each case by one or more radicals R⁵, or is an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, wherein the aromatic or the heteroaromatic ring system is optionally substituted in each case by one or more radicals R⁵, or is an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms, wherein the aryloxy or the heteroaryloxy group is optionally substituted by one or more radicals R⁵, or is a diarylamino group, diheteroarylamino group or arylheteroarylamino group having 10 to 40 aromatic ring atoms wherein the diarylamino group, the diheteroarylamino group or the arylheteroarylamino is optionally substituted by one or more radicals R⁵, or is a combination of these systems; where optionally two or more of these substituents R⁵ may also form with one another a mono-or polycyclic, aliphatic, aromatic and/or benzo-fused ring system; and

R⁵, identically or differently at each occurrence, is H, deuterium or an aliphatic, aromatic and/or heteroaromatic radical having 1 to 20 carbon atoms; where optionally two or more substituents R⁵ may also form with one another a mono-or polycyclic, aliphatic ring system.