Novaled Gmbh

Bodo Wallikewitz

Carsten Rothe

Volodymyr Senkovskyy

Julien Frey

Thomas Rosenow

Ulrich Denker

Tobias Canzler

Mike Zöllner

Johannes Scholz

Katja Gräf

Francisco Bloom

Martin Köhler

The present invention is directed to matrix compounds and an organic light-emitting diode (OLED) comprising an emission layer and an electron transport layer stack of at least two electron transport layers, wherein a first electron transport layer and a second electron transport layer comprises at least one matrix compound, wherein the matrix compound or compounds of the first electron transport layer is/are different to the matrix compound or compounds of the second electron transport layer; and in addition, the first electron transport layer comprises a dopant of a lithium halide and/or lithium organic complex; and the second electron transport layer is free of a dopant; wherein at least one matrix compound of the second electron transport layer having the chemical formula Ia, Ib and/or Ic: (Ia) (Ib) (Ic) wherein Ar=substituted or unsubstituted arylene with 6 to 20 ring-forming carbon atoms; or carbazolylene; ET=substituted or unsubstituted aryl group with 13 to 40 ring-forming carbon atoms; or a substituted or unsubstituted heteroaryl group with 14 to 40 ring-forming atoms. 

Organic light-emitting diode comprising different matrix compounds in the first and second electron transport layer

The present invention relates to an organic light-emitting diode comprising an emission layer and an electron transport layer stack of at least two electron transport layers, wherein a first electron transport layer and a second electron transport layer comprises at least one matrix compound, wherein&#x2014;the matrix compound or compounds of the first electron transport layer is/are different to the matrix compound or compounds of the second electron transport layer; and in addition, &#x2014;the first electron transport layer comprises a dopant of a lithium halide and/or lithium organic complex; and&#x2014;the second electron transport layer is free of a dopant.

Organic light-emitting diode comprising electron transport layers with different matrix compounds

The present invention relates to a an organic light-emitting diode (OLED,) comprising at least one emission layer (), and an electron transport layer stack () of at least two electron transport layers, wherein a first electron transport layer () and a second electron transport layer () comprises at least one matrix compound and in addition, &#x2014;the at least first electron transport layer comprises a lithium halide or a lithium organic complex; and the at least second electron transport layer comprises an elemental metal selected from the group of lithium, magnesium and/or ytterbium; or&#x2014;the at least first electron transport layer comprises an elemental metal selected from the group of lithium, magnesium and/or ytterbium; and the at least second electron transport layer comprises a lithium halide or a lithium organic complex; wherein the electron transport layer or layers comprising a lithium halide or a lithium organic complex is free of an elemental metal, and the electron transport layer or layers that comprises an elemental metal is free of a metal salt and/or a metal organic complex.

Organic light-emitting diode including an electron transport layer stack comprising different lithium compounds and elemental metal

The present invention relates to an organic light-emitting diode () comprising an emission layer () and at least one electron transport layer (), wherein the at least one electron transport layer () comprises at least one matrix compound and at least two lithium compounds.

Organic light-emitting diode including an electronic transport layer comprising a three component blend of a matrix compound and two lithium compounds

The present invention relates to a an organic light-emitting diode (OLED) () comprising an emission layer and an electron transport layer stack of at least two electron transport layers (), wherein a first electron transport layer () and a second electron transport layer () comprises at least one matrix compound and in addition, &#x2014;the first electron transport layer () comprises a first lithium halide or a first lithium organic complex; and &#x2014;the second electron transport layer () comprises a second lithium halide or a second lithium organic complex, wherein the first lithium organic complex is not the same as the second lithium organic complex; and wherein the first lithium halide is not the same as the second lithium halide.

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Dresden, Germany

Bodo Wallikewitz