Efficiency and Droop Improvement in GaN-Based High-Voltage Flip Chip LEDs
The GaN-based high-voltage flip chip light-emitting diode (HVFC-LED) is designed and developed for the purpose of efficiency enhancement. In our design, the distributed Bragg reflector (DBR) is deposited at the bonded substrate to increase the light extraction. After the flip chip process, the gener...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2014/385257 |
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| author | Yen-Chih Chiang Bing-Cheng Lin Kuo-Ju Chen Sheng-Huan Chiu Chien-Chung Lin Po-Tsung Lee Min-Hsiung Shih Hao-Chung Kuo |
| author_facet | Yen-Chih Chiang Bing-Cheng Lin Kuo-Ju Chen Sheng-Huan Chiu Chien-Chung Lin Po-Tsung Lee Min-Hsiung Shih Hao-Chung Kuo |
| author_sort | Yen-Chih Chiang |
| collection | DOAJ |
| description | The GaN-based high-voltage flip chip light-emitting diode (HVFC-LED) is designed and developed for the purpose of efficiency enhancement. In our design, the distributed Bragg reflector (DBR) is deposited at the bonded substrate to increase the light extraction. After the flip chip process, the general current-voltage characteristics between the flip chip sample and the traditional sample are essentially the same. With the help of great thermal conductive silicon substrate and the bottom DBR, the HVFC-LED is able to enhance the power by 37.1% when compared to the traditional high-voltage LEDs. The wall-plug efficiencies of the HVFC-LED also show good droop reduction as high as 9.9% compared to the traditional devices. |
| format | Article |
| id | doaj-art-c02a57a39ee04cd8ab2ca79f004719ba |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-c02a57a39ee04cd8ab2ca79f004719ba2025-02-03T01:29:03ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2014-01-01201410.1155/2014/385257385257Efficiency and Droop Improvement in GaN-Based High-Voltage Flip Chip LEDsYen-Chih Chiang0Bing-Cheng Lin1Kuo-Ju Chen2Sheng-Huan Chiu3Chien-Chung Lin4Po-Tsung Lee5Min-Hsiung Shih6Hao-Chung Kuo7Institute of Lighting and Energy Photonics, National Chiao Tung University, Tainan 71550, TaiwanDepartment of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, TaiwanDepartment of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, TaiwanDepartment of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, TaiwanInstitute of Photonics System, National Chiao Tung University, Tainan 71550, TaiwanDepartment of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, TaiwanResearch Center for Applied Sciences, Academia Sinica, 128 Academia Road, Sec. 2 Nankang, Taipei 115, TaiwanDepartment of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, TaiwanThe GaN-based high-voltage flip chip light-emitting diode (HVFC-LED) is designed and developed for the purpose of efficiency enhancement. In our design, the distributed Bragg reflector (DBR) is deposited at the bonded substrate to increase the light extraction. After the flip chip process, the general current-voltage characteristics between the flip chip sample and the traditional sample are essentially the same. With the help of great thermal conductive silicon substrate and the bottom DBR, the HVFC-LED is able to enhance the power by 37.1% when compared to the traditional high-voltage LEDs. The wall-plug efficiencies of the HVFC-LED also show good droop reduction as high as 9.9% compared to the traditional devices.http://dx.doi.org/10.1155/2014/385257 |
| spellingShingle | Yen-Chih Chiang Bing-Cheng Lin Kuo-Ju Chen Sheng-Huan Chiu Chien-Chung Lin Po-Tsung Lee Min-Hsiung Shih Hao-Chung Kuo Efficiency and Droop Improvement in GaN-Based High-Voltage Flip Chip LEDs International Journal of Photoenergy |
| title | Efficiency and Droop Improvement in GaN-Based High-Voltage Flip Chip LEDs |
| title_full | Efficiency and Droop Improvement in GaN-Based High-Voltage Flip Chip LEDs |
| title_fullStr | Efficiency and Droop Improvement in GaN-Based High-Voltage Flip Chip LEDs |
| title_full_unstemmed | Efficiency and Droop Improvement in GaN-Based High-Voltage Flip Chip LEDs |
| title_short | Efficiency and Droop Improvement in GaN-Based High-Voltage Flip Chip LEDs |
| title_sort | efficiency and droop improvement in gan based high voltage flip chip leds |
| url | http://dx.doi.org/10.1155/2014/385257 |
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