Luminance enhancement of top-emitting blue organic light emitting diodes encapsulated with silicon nitride thin films by a double-layer nano-structure

Even though it is in high demand to introduce a nano-structure (NS) light extraction technology on a silicon nitride to be used as a thin film encapsulation material for an organic light-emitting diode (OLED), only an industry-incompatible wet method has been reported. This work demonstrates a doubl...

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Veröffentlicht in:Optics express 2022-03, Vol.30 (7), p.11959-11972
Hauptverfasser: Cho, Doo-Hee, Park, Young-Sam, Choi, Sukyung, Cho, Hyunsu, Kwon, Byoung-Hwa, Shin, Jin-Wook, Cho, Nam Sung
Format: Artikel
Sprache:eng
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Zusammenfassung:Even though it is in high demand to introduce a nano-structure (NS) light extraction technology on a silicon nitride to be used as a thin film encapsulation material for an organic light-emitting diode (OLED), only an industry-incompatible wet method has been reported. This work demonstrates a double-layer NS fabrication on the silicon nitride using a two-step organic vapor phase deposition (OVPD) of an industry-compatible dry process. The NS showed a wrinkle-like shape caused by coalescence of the nano-lenses. The NS integrated top-emitting OLED revealed 40 percent enhancement of current efficiency and improvement of the luminance distribution and color change according to viewing angle.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.452954