Double-Grating Displacement Structure for Improving the Light Extraction Efficiency of LEDs
Joint Authors
Zhu, Dandan
Wang, Zhibin
Wang, Zhongdong
Hao, Yang
Zhang, Qian
Liu, Xian
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-10-15
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Medicine
Information Technology and Computer Science
Abstract EN
To improve the light extraction efficiency of light-emitting diodes (LEDs), grating patterns were etched on GaN and silver film surfaces.
The grating-patterned surface etching enabled the establishment of an LED model with a double-grating displacement structure that is based on the surface plasmon resonance principle.
A numerical simulation was conducted using the finite difference time domain method.
The influence of different grating periods for GaN surface and silver film thickness on light extraction efficiency was analyzed.
The light extraction efficiency of LEDs was highest when the grating period satisfied grating coupling conditions.
The wavelength of the highest value was also close to the light wavelength of the medium.
The plasmon resonance frequencies on both sides of the silver film were affected by silver film thickness.
With increasing film thickness, plasmon resonance frequency tended toward the same value and light extraction efficiency reached its maximum.
When the grating period for the GaN surface was 365 nm and the silver film thickness was 390 nm, light extraction efficiency reached a maximum of 55%.
American Psychological Association (APA)
Wang, Zhibin& Hao, Yang& Wang, Zhongdong& Liu, Xian& Zhang, Qian& Zhu, Dandan. 2012. Double-Grating Displacement Structure for Improving the Light Extraction Efficiency of LEDs. The Scientific World Journal،Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-477793
Modern Language Association (MLA)
Wang, Zhibin…[et al.]. Double-Grating Displacement Structure for Improving the Light Extraction Efficiency of LEDs. The Scientific World Journal No. 2012 (2012), pp.1-6.
https://search.emarefa.net/detail/BIM-477793
American Medical Association (AMA)
Wang, Zhibin& Hao, Yang& Wang, Zhongdong& Liu, Xian& Zhang, Qian& Zhu, Dandan. Double-Grating Displacement Structure for Improving the Light Extraction Efficiency of LEDs. The Scientific World Journal. 2012. Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-477793
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-477793