Enhancing the Out-Coupling Efficiency of Organic Light-Emitting Diodes Using Two-Dimensional Periodic Nanostructures
Joint Authors
Kong, Fanmin
Yue, Qingyang
Li, Wei
Li, Kang
Source
Advances in Materials Science and Engineering
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-14
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
The out-coupling efficiency of planar organic light emitting diodes (OLEDs) is only about 20% due to factors, such as, the total internal reflection, surface plasmon coupling, and metal absorption.
Two-dimensional periodic nanostructures, such as, photonic crystals (PhCs) and microlenses arrays offer a potential method to improve the out-coupling efficiency of OLEDs.
In this work, we employed the finite-difference time-domain (FDTD) method to explore different mechanisms that embedded PhCs and surface PhCs to improve the out-coupling efficiency.
The effects of several parameters, including the filling factor, the depth, and the lattice constant were investigated.
The result showed that embedded PhCs play a key role in improving the out-coupling efficiency, and an enhancement factor of 240% was obtained in OLEDs with embedded PhCs, while the enhancement factor of OLEDs with surface PhCs was only 120%.
Furthermore, the phenomena was analyzed using the mode theory and it demonstrated that the overlap between the mode and PhCs was related to the distribution of vertical mode profiles.
The enhancement of the extraction efficiency in excess of 290% was observed for the optimized OLEDs structure with double PhCs.
This proposed structure could be a very promising candidate for high extraction efficiency OLEDs.
American Psychological Association (APA)
Yue, Qingyang& Li, Wei& Kong, Fanmin& Li, Kang. 2012. Enhancing the Out-Coupling Efficiency of Organic Light-Emitting Diodes Using Two-Dimensional Periodic Nanostructures. Advances in Materials Science and Engineering،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-513738
Modern Language Association (MLA)
Yue, Qingyang…[et al.]. Enhancing the Out-Coupling Efficiency of Organic Light-Emitting Diodes Using Two-Dimensional Periodic Nanostructures. Advances in Materials Science and Engineering No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-513738
American Medical Association (AMA)
Yue, Qingyang& Li, Wei& Kong, Fanmin& Li, Kang. Enhancing the Out-Coupling Efficiency of Organic Light-Emitting Diodes Using Two-Dimensional Periodic Nanostructures. Advances in Materials Science and Engineering. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-513738
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-513738