Double-grating displacement structure for improving the light extraction efficiency of LEDs.
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...
| Publicado en: | Scientific World Journal pp. 515468 - 515469 |
|---|---|
| Autores principales: | , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Wiley-Blackwell
2012
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104380578&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104380578 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 1537744X 1BX5 jtl: Scientific World Journal issn: 1537744X maglogo: N pubinfo: dt: 2012 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 104380578 104380578 NLM23118613 2011741681 10.1100/2012/515468 NLM23118613 PMC3478720 104380578 ppf: 515468 ppct: 1 formats: tig: atl: Double-grating displacement structure for improving the light extraction efficiency of LEDs. aug: au: Wang, Zhibin Hao, Yang Wang, Zhongdong Liu, Xian Zhang, Qian Zhu, Dandan affil: College of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China. sug: subj: Computer-Aided Design Lighting Equipment and Supplies Models, Theoretical Refractometry Equipment and Supplies Electronics Computer Simulation Energy Transfer Equipment Design ab: 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%. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|