Semiconducting material comprising a phosphine oxide matrix and metal salt

A compound having the structure according to formula (I)

• wherein in structure (I):
• R1, R2 and R3 are independently selected from C1-C30-alkyl, C3-C30 cycloalkyl, C2-C30-heteroalkyl, C6-C30-aryl, C2-C30-heteroaryl, C1-C30-alkoxy, C3-C30-cycloalkyloxy, C6-C30-aryloxy, and from a structural unit having general formula E-A-, and at least one group selected from R1, R2 and R3 has the general formula E-A;
• wherein
• A is a C6-C30 phenylene spacer unit, and
• E is an electron transport unit having the structure (Ib), (Ic), (Id) and/or (Ie):
• wherein in structure (Ib)
• X is a single bond and
• Z is selected from a group comprising dibenzo[b,d]furanyl, dibenzo[b,d]thiophenyl, 9-anthranyl, pyren-1-yl, pyren-2-yl, 9,9′-dialkylfluoren-2-yl, 9,9′-diarylfluoren-2-yl, 9-alkyl-9′-arylfluoren-2-yl, 9,9′-dialkylfluoren-3-yl, 9,9′-diarylfluoren-3-yl, 9-alkyl-9′-arylfluoren-3-yl, phenanthren-1-yl and phenanthren-3-yl;
• or
• wherein in structure (Ib)
• X is selected from a group comprising phenylene, biphenyl, naphthalen-1,8-diyl, naphthalen-2,6-diyl, 9,9′-dialkylfluoren-2,7-diyl, 9,9′-diarylfluoren-2,7-diyl, 9-alkyl-9′-arylfluoren-2,7-diyl, 9,9′-dialkylfluoren-3,6-diyl, 9,9′-diarylfluoren-3,6-diyl and 9-alkyl-9′-arylfluoren-3,6-diyl;
• and
• Z is selected from a group comprising hydrogen,
• dibenzo[b,d]furanyl, dibenzo[b,d]thiophenyl, 9-anthranyl, pyren-1-yl, pyren-2-yl, 9,9′-dialkylfluoren-2-yl, 9,9′-diarylfluoren-2-yl, 9-alkyl-9′-arylfluoren-2-yl, 9,9′-dialkylfluoren-3-yl, 9,9′-diarylfluoren-3-yl, 9-alkyl-9′-arylfluoren-3-yl, phenanthren-1-yl and phenanthren-3-yl;
• wherein in structure (Ic)
• X is selected from a single bond, phenylene and 1,1′-biphenyl-diyl;
• and
• Y is phenylene;
• wherein in structure (Id)
• X is selected from a group comprising phenylene, 1,1′-biphenyl-diyl, naphthalen-1,8-diyl, naphthalen-2,6-diyl, 9,9′-dialkylfluoren-2,7-diyl, 9,9′-diarylfluoren-2,7-diyl, 9-alkyl-9′-arylfluoren-2,7-diyl, 9,9′-dialkylfluoren-3,6-diyl, 9,9′-diarylfluoren-3,6-diyl and 9-alkyl-9′-arylfluoren-3,6-diyl;
• wherein in structure (Ie)
• X is a single bond;
• and
• Z1 and Z2 are independently selected from a group comprising phenyl, naphthyl, dibenzo[b,d]furanyl, dibenzo[b,d]thiophenyl, 9-anthranyl, pyren-1-yl, pyren-2-yl, 9,9′-dialkylfluoren-2-yl, 9,9′-diarylfluoren-2-yl, 9-alkyl-9′-arylfluoren-2-yl, 9,9′-dialkylfluoren-3-yl, 9,9′-diarylfluoren-3-yl, 9-alkyl-9′-arylfluoren-3-yl, phenanthrene-1-yl and phenanthrene-3-yl;
• wherein the following structures are excluded: