Novaled Gmbh

Stefan Zott

Volodymyr Senkovskyy

Ulrich Denker

Pierre Seidenglanz

Benjamin Schulze

Francois Cardinali

Regina Luschtinetz

Martin Ammann

Peter Robaschik

Anne Fadhel

The present invention relates to a method for preparing an organic semiconducting layer comprising the steps: a) providing a first composition in a first vacuum thermal evaporation source, the first composition comprising aa) a first organic compound, the first organic compound comprising at least one unsubstituted or substituted C-Ccondensed aryl group and/or at least one unsubstituted or substituted C-Cheteroaryl group, wherein the one or more substituent(s) if present, are selected from the group consisting of (i) deuterium, (ii) a halogen, (iii) a Cto Csilyl group, (iv) a Cto Calkyl group, (v) a C to Calkylsilyl group, (vi) a Cto Carylsilyl group, (vii) a Cto Ccycloalkyl group, (viii) a Cto Cheterocycloalkyl group, (ix) a Cto Caiyl group, (x) a Cto Cheteroaryl group, (xi) a Cto Cperfluoro-hydrocarbyl group, or (xii) a Cto Ctrifluoroalkyl group, wherein the first organic compound has i) a dipole moment in the range of ≥0 and ≤2 Debye; and ii) a molecular weight in the range of ≥400 and ≤1,800; and bb) a metal borate compound; b) transferring the first composition from the solid phase into the gas phase in a vacuum chamber; and c) depositing the first composition on a substrate to form the organic semiconducting layer; a composition for use therein, and an organic electronic device prepared this way.

Method for preparing an organic semiconducting layer, a composition for use therein and an organic electronic device

Organic electroluminescent device comprising an anode, a cathode, at least one emission layer and an organic semiconducting layer; wherein the organic semiconducting layer is arranged between the at least one emission layer and the cathode; wherein the organic semiconducting layer comprises; a) a first organic compound comprising a first Cto Carene structural moiety and/or a first Cto Cheteroarene structural moiety, wherein i) the dipole moment of the first organic compound, computed by the TURBOMOLE V6.5 program package using hybrid functional B3LYP and Gaussian 6-31G* basis set, is from 0 to 2.5 Debye; and ii) the LUMO energy level of the first organic compound in the absolute scale taking vacuum energy level as zero, computed by the TURBOMOLE V6.5 program package using hybrid functional B3LYP and Gaussian 6-31G* basis set, is in the range from −1.7 eV to −2.1 eV; and b) a second organic compound comprising a second Cto Carene structural moiety and/or a second Cto Cheteroarene structural moiety and in addition at least one polar group selected from phosphine oxide and phosphine sulfide, wherein in) the dipole moment of the second organic compound, computed by the TURBOMOLE V6.5 program package using hybrid functional B3LYP and Gaussian 6-31G* basis set, is from 1.5 to 10 Debye; and iv) the LUMO energy level of the second organic compound in the absolute scale taking vacuum energy level as zero is less than 0.25 eV higher or lower than the LUMO energy level of the first organic compound; wherein it is provided that the first organic compound and the second organic compound are different from each other.

Organic electroluminescent device and a solid composition for use therein

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Dresden, Germany

Stefan Zott