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Journal Article
Improvement of Light Out-Coupling Efficiency in Organic Light-Emitting Diodes with Variable Nanopatterns
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- Authors
- Jeong Ho Kim, Joong-Yeon Cho, Jaehoon Park, Bong Kuk Lee, Kyu-Ha Baek, Heon Lee, Lee-Mi Do
- Issue Date
- 2014-01
- Citation
- Electronic Materials Letters, v.10, no.1, pp.27-29
- ISSN
- 1738-8090
- Publisher
- Springer, 대한금속재료학회
- Language
- English
- Type
- Journal Article
- Abstract
- 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. © 2014 The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.
- KSP Keywords
- Electrical degradation, Extraction efficiency(EE), Glass substrate, Organic layer, Top-emitting OLEDs, current efficiency, light emitting diodes(LED), light extraction efficiency, light outcoupling, organic light emitting diode(OLED), out-coupling efficiency