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US 2016/0111654 A1Published application
Semiconducting Material Comprising Aza-Substituted Phosphine Oxide Matrix and Metal Salt
AssigneeNovaled GmbH
InventorMike Zoellner
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Abstract
The present invention relates to a semiconducting material including at least one salt or complex of a metal cation and an aza-substituted phosphine oxide compound with improved electrical properties, and to a compound suitable for this organic semiconducting material and an electronic device utilizing the improved electrical properties of the semiconducting material.
Claims15
A semiconducting material comprising at least one salt or complex of a metal cation, and a compound according to formula (I):
- wherein 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, or from a structural unit having general formula E-A-,
- wherein A is a spacer unit comprising a trivalent nitrogen atom having a lone electron pair, wherein the spacer unit has a structure which allows formation of a 5-, 6- or 7-membered chelate ring with the metal cation, wherein the chelate ring comprises the oxygen atom of formula (I) and the trivalent nitrogen atom of the spacer unit coordinated to the metal cation, and E is an electron transporting unit comprising a conjugated system of at least 10 delocalized electrons, and
- wherein at least one group selected from R1, R2 or R3 is E-A-.
A compound having the structure according to formula (I):
- wherein 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, or C6-C30-aryloxy,
- at least one of R1, R2 and R3 is a group represented by the following formula—
- wherein the dashed line represents the single bond to the phosphorus atom of formula (I),
- Y1 and Y3 are independently selected from H, phenyl, naphtyl, 1,1′-biphenylyl, quinolinyl, anthracenyl, phenanthrenyl, pyrenyl, or P(O)R4R5;
- Y2 and Y4 are independently selected from H, phenyl, naphtyl, 1,1′-biphenylyl, quinolinyl, anthracenyl, phenanthrenyl, or pyrenyl;
- R4 and R5 are independently selected from C6-C30 aryl, C3-C30 cycloalkyl, or C3-C30 heteroaryl,
- X1 and X2 are independently selected from C and N, with the proviso that
- iv) both X1 and X2 are not N, and if any of X1 and X2 is N, the adjacent Y is an electron lone pair,
- v) none of Y1 and Y3 is P(O)R4R5 if any of X1 and X2 is N, and
- vi) at least one of Y1, Y2, Y3, Y4 is 1,1′-biphenylyl or comprises at least two condensed aromatic rings.
7 more elements
Dependencies are inferred from the claim text.