Improvement of light out-coupling efficiency in organic light-emitting diodes with variable nanopatterns

We present a viable method to enhance the current efficiency of organic light-emitting diodes (OLEDs) by imprinting cylindrical nanopatterns (NPs) onto a glass substrate. Herein, OLEDs equipped with an optimum NP array having a diameter of 300 nm and a periodic distance of 500 nm show a 33.4% improv...

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Veröffentlicht in:	Electronic materials letters 2014, 10(1), , pp.27-29
Hauptverfasser:	Kim, Jeong Ho, Cho, Joong-Yeon, Park, Jaehoon, Lee, Bong Kuk, Baek, Kyu-Ha, Lee, Heon, Do, Lee-Mi
Format:	Artikel
Sprache:	eng
Schlagworte:	Arrays Characterization and Evaluation of Materials Chemistry and Materials Science Condensed Matter Physics Current efficiency Encapsulation Glass Materials Science Nanostructure Nanotechnology Nanotechnology and Microengineering Optical and Electronic Materials Optimization Organic light emitting diodes 전자/정보통신공학
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Beschreibung
Zusammenfassung:	We present a viable method to enhance the current efficiency of organic light-emitting diodes (OLEDs) by imprinting cylindrical nanopatterns (NPs) onto a glass substrate. Herein, OLEDs equipped with an optimum NP array having a diameter of 300 nm and a periodic distance of 500 nm show a 33.4% improvement in current efficiency compared with a device without NPs. The light extraction efficiency of OLEDs was enhanced using a nanopatterned glass substrate, without any electrical degradation owing to the formation of NPs on opposite sides of the organic layers. In addition, top-emitting OLEDs can be fabricated easily by patterning the encapsulation glass.
ISSN:	1738-8090 2093-6788
DOI:	10.1007/s13391-013-3059-5