Organic light-emitting device
AssigneeSamsung Display Co., Ltd.
InventorsNaoyuki Ito, Seul-Ong Kim, Youn-Sun Kim, Dong-Woo Shin, Jung-Sub Lee
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Abstract
An organic light-emitting device includes an anode, a cathode, and an organic layer between the anode and the cathode, wherein the organic layer includes a mixed organic layer, and the mixed organic layer includes at least two different compounds, and a triplet energy of at least one compound of the at least two different compounds is 2.2 eV or higher. The organic light-emitting device according to embodiments of the present invention may have a low driving voltage, a high efficiency, and a long lifespan.
Claims20
An organic light-emitting device comprising
- an anode;
- a cathode;
- and
- an organic layer between the anode and the cathode and comprising an emission layer (EML), a hole transport region between the anode and the EML and comprising at least one selected from a hole injection layer (HIL), a hole transport layer (HTL), a buffer layer, and an electron blocking layer (EBL), and an electron transport region between the EML and the cathode and comprising at least one selected from a hole blocking layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL),
- wherein a mixed organic layer is between the entire EML and the electron transport region and comprises at least two different compounds, a triplet energy of at least one compound of the at least two different compounds being 2.2 eV or greater.
An organic light-emitting device comprising:
- an anode;
- a cathode;
- and
- an organic layer between the anode and the cathode and comprising an emission layer (EML);
- a hole transport region between the anode and the EML and comprising at least one selected from a hole injection layer (HIL), a hole transport layer (HTL), a buffer layer, and an electron blocking layer (EBL);
- and an electron transport region between the EML and the cathode and comprising at least one selected from a hole blocking layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL),
- wherein a mixed organic layer is between the EML and the electron transport region and comprises at least two different compounds, a triplet energy of at least one compound of the at least two different compounds being 2.2 eV or greater, and
- wherein the at least two different compounds comprise a hole-transporting compound and an electron-transporting compound, and an electron affinity of the hole-transporting compound is less than an electron affinity of the electron-transporting compound.
Dependencies are inferred from the claim text.