Organic light emitting diode device
View Patent ↗An organic light emitting diode device includes a first electrode, a second electrode, and an emission layer disposed between the first and second electrodes. The first electrode includes a first layer and a second layer. The first layer includes ytterbium (Yb), samarium (Sm), lanthanum (La), yttrium (Y), calcium (Ca), strontium (Sr), cesium (Cs), ruthenium (Ru), barium (Ba), or a combination thereof and having a thickness ranging from about 40 to 200 Å. The second layer includes silver (Ag), aluminum (Al), copper (Cu), chromium (Cr), or a combination thereof and having a thickness ranging from about 100 to 250 Å.
1. An organic light emitting diode device comprising;
a first electrode;
a second electrode facing the first electrode; and
an emission layer disposed between the first and second electrodes,
wherein the first electrode comprises:
a first layer having a thickness ranging from about 40 Å to 200 Å and comprising ytterbium (Yb), samarium (Sm), lanthanum (La), yttrium (Y), strontium (Sr), cesium (Cs), ruthenium (Ru), barium (Ba), or a combination thereof, and
a second layer having a thickness ranging from about 180 Å to 250 Å and comprising silver (Ag), aluminum (Al), copper (Cu), chromium (Cr), or a combination thereof,
with the first electrode having a sheet resistance of about 5 Ω/cm 2 or lower.
2. The organic light emitting diode device of claim 1 , wherein the first electrode has a transmittance ranging from about 20 to 50% in a wavelength of 550 nm.
3. The organic light emitting diode device of claim 2 , wherein the first layer comprises ytterbium (Yb) and the second layer comprises silver (Ag).
4. The organic light emitting diode device of claim 1 , wherein the first electrode further comprises a third layer comprising an oxide, a nitride, or a nitrogen oxide.
5. The organic light emitting diode device of claim 4 , wherein the third layer has a refractive index of about 1.5 or higher.
6. The organic light emitting diode device of claim 1 , wherein the first electrode is a cathode and the second electrode is an anode.