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Enhancement of Light Extraction Efficiency Using Lozenge-Shaped GaN-Based Light-Emitting Diodes
- Authors
- Jang, Dong-Hyun; Shim, Jong-In; Shin, Dong-Soo
- Issue Date
- May-2009
- Publisher
- Institute of Electrical and Electronics Engineers
- Keywords
- Extraction efficiency; GaN; light-emitting diodes (LEDs); lozenge; shaping
- Citation
- IEEE Photonics Technology Letters, v.21, no.9-12, pp.760 - 762
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE Photonics Technology Letters
- Volume
- 21
- Number
- 9-12
- Start Page
- 760
- End Page
- 762
- ISSN
- 1041-1135
- Abstract
- We have demonstrated both theoretically and experimentally that a lozenge-shaped light-emitting diode (LED) enhances light extraction efficiency compared with a conventional rectangular LED. The total light output power of the lozenge-shaped LED on a transmitter optical can (TO-can)-type package shows an increase of 12% at an injection current of 20 mA when compared with that of a rectangular LED. Moreover, the series resistance and the forward voltage of the lozenge-shaped LED slightly decrease compared with those of the rectangular LED. The far-field emission pattern shows that the light escaping from the lozenge-shaped LED along the horizontal direction is larger than that from the rectangular LED.
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Related Researcher
- Shim, Jong In
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY (DEPARTMENT OF PHOTONICS AND NANOELECTRONICS)