Semiconducting Material Comprising a Phosphepine Matrix Compound
申请人:Novaled GmbH
公开号:US20160336516A1
公开(公告)日:2016-11-17
The invention is directed to a use of a compound comprising at least one phosphepine ring as matrix material in semiconducting materials, the semiconducting material as well as electronic devices. The phosphepine ring matrix material may be doped by a lithium complex.
Electron Transport Layer Comprising a Matrix Compound Mixture for an Organic Light-Emitting Diode (OLED)
申请人:NOVALED GMBH
公开号:US20210376259A1
公开(公告)日:2021-12-02
The present invention is directed to an organic light emitting diode (
100
) comprising:
at least one anode electrode (
120
);
at least one emission layer (
150
), wherein the emission layer comprises at least one emitter dopant that emits visible light at operation of the OLED (
100
);
an electron transport layer stack (
160
) of at least two electron transport layers (
161/162
), and wherein
a) the first electron transport layer (
161
) comprises i) a first organic aromatic matrix compound having a MW of about ≥400 to about ≤1000 and a dipole moment of about ≥0 Debye and about ≤2.5 Debye, wherein the first electron transport layer (
161
) is free of a polar organic aromatic phosphine compound; and
b) the second electron transport layer (
162
) comprises two organic aromatic matrix compounds, which are a mixture of:
i) the first organic aromatic matrix compound; and
ii) a polar organic aromatic phosphine compound having a MW of about ≥400 to about ≤1000, and a dipole moment of about >2.5 Debye and about ≤10 Debye; and
at least one cathode electrode layer (
190
); wherein
the electron transport layer stack (
160
) is arranged between the emission layer (
150
) and the cathode electrode layer (
190
), the first electron transport layer (
161
) is in direct contact with the second electron transport layer (
162
), and wherein the first electron transport layer (
161
) is arranged nearer to the emission layer (
150
) and the second electron transport layer (
162
) is arranged nearer to the cathode electrode layer (
190
).