Organic light-emitting diode and method of manufacturing the same
View Patent ↗An organic light-emitting diode (OLED) with an increased service life and a method of manufacturing the same are provided. The OLED is subjected to electromagnetic radiation with a spectrum that at least partially overlaps the absorption spectrum of an organic material layer of the OLED. As a result, the OLED has a longer service life, reduced decay in its initial brightness, and more saturated color than a conventional OLED.
1. A method of manufacturing an organic light-emitting diode (OLED) having an organic material having an absorption spectrum, where the organic material can generate photo-luminescence by absorbing radiated electromagnetic energy of a wavelength of the absorption spectrum, comprising irradiating the OLED with electromagnetic radiation, wherein a radiation spectrum of the electromagnetic radiation at least partially corresponds to the absorption spectrum of the organic material, and wherein an energy density of the electromagnetic radiation is equal to or greater than about 500 Ws/cm 2 .
2. The method of claim 1 , wherein irradiating the OLED is performed before the OLED is first used.
3. The method of claim 2 , wherein irradiating the OLED is performed after a cathode of the OLED is deposited.
4. The method of claim 1 , wherein irradiating the OLED is performed after the OLED first operates.
5. The method of claim 4 , wherein irradiating the OLED is performed during the burn-in process.
6. The method of claim 1 , wherein the OLED comprises a transparent electrode, and the electromagnetic radiation is irradiated through a surface of the transparent electrode.
7. The method of claim 1 , wherein the OLED is irradiated for between about 1 minute to about 10 hours.
8. The method of claim 7 , wherein the OLED is irradiated for between about 3 hours to about 6 hours.
9. The method of claim 1 , wherein a light source generates the electromagnetic radiation and the OLED is spaced from the light source by about 5 cm to about 150 cm.
10. The method of claim 1 , wherein a substrate of the OLED has a transmissivity greater than about 0.5 in higher-frequency and lower-frequency portions of the radiation spectrum, and the radiation spectrum at least partially corresponds to the absorption spectrum of the organic material layer of the OLED.
11. The method of the claim 1 , wherein layers formed between the transparent electrode and organic material layer of the OLED comprise a transmissivity greater than about 0.5 to the radiation spectrum.
12. The method of the claim 1 , wherein a light source generates the electromagnetic radiation and the light source comprises either a sun simulator or a UV light source.
13. An OLED, comprising:
a first electrode;
an organic material layer having an absorption spectrum; and
a second electrode,
wherein the OLED is subjected to electromagnetic radiation having a radiation spectrum that at least partially corresponds the absorption spectrum of the organic material layer, and
wherein an energy density of the electromagnetic radiation is equal to or greater than about 500 Ws/cm 2 .
14. The OLED of claim 13 , wherein the electromagnetic radiation is irradiated before the OLED is first used.
15. The OLED of claim 14 , wherein the electromagnetic radiation is irradiated after a cathode of the OLED is deposited.
16. The OLED of claim 13 , wherein the electromagnetic radiation is irradiated after the OLED first operates.
17. The OLED of claim 16 , wherein the electromagnetic radiation is irradiated during the burn-in process.