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...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1100/2012/515468 |
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| _version_ | 1832564732992684032 |
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| author | Zhibin Wang Yang Hao Zhongdong Wang Xian Liu Qian Zhang Dandan Zhu |
| author_facet | Zhibin Wang Yang Hao Zhongdong Wang Xian Liu Qian Zhang Dandan Zhu |
| author_sort | Zhibin Wang |
| collection | DOAJ |
| description | 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%. |
| format | Article |
| id | doaj-art-1cdbfca16433465793ed7c4328b1ea1b |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-1cdbfca16433465793ed7c4328b1ea1b2025-02-03T01:10:17ZengWileyThe Scientific World Journal1537-744X2012-01-01201210.1100/2012/515468515468Double-Grating Displacement Structure for Improving the Light Extraction Efficiency of LEDsZhibin Wang0Yang Hao1Zhongdong Wang2Xian Liu3Qian Zhang4Dandan Zhu5College of Electrical Engineering, Yanshan University, Qinhuangdao 066004, ChinaCollege of Electrical Engineering, Yanshan University, Qinhuangdao 066004, ChinaMechanical Science and Engineering Institute, Northeast Petroleum University, Daqing 163318, ChinaCollege of Electrical Engineering, Yanshan University, Qinhuangdao 066004, ChinaCollege of Electrical Engineering, Yanshan University, Qinhuangdao 066004, ChinaCollege of Electrical Engineering, Yanshan University, Qinhuangdao 066004, ChinaTo 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%.http://dx.doi.org/10.1100/2012/515468 |
| spellingShingle | Zhibin Wang Yang Hao Zhongdong Wang Xian Liu Qian Zhang Dandan Zhu Double-Grating Displacement Structure for Improving the Light Extraction Efficiency of LEDs The Scientific World Journal |
| title | Double-Grating Displacement Structure for Improving the Light Extraction Efficiency of LEDs |
| title_full | Double-Grating Displacement Structure for Improving the Light Extraction Efficiency of LEDs |
| title_fullStr | Double-Grating Displacement Structure for Improving the Light Extraction Efficiency of LEDs |
| title_full_unstemmed | Double-Grating Displacement Structure for Improving the Light Extraction Efficiency of LEDs |
| title_short | Double-Grating Displacement Structure for Improving the Light Extraction Efficiency of LEDs |
| title_sort | double grating displacement structure for improving the light extraction efficiency of leds |
| url | http://dx.doi.org/10.1100/2012/515468 |
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