Light extraction efficiency enhancement using surface-structured light-emitting diodes with a subwavelength coating
| Autor: | Q. Han Park, Myung Su Seok, SeokJae Yoo, Jong-Ho Choe, Yong Tae Moon |
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| Rok vydání: | 2016 |
| Předmět: |
Total internal reflection
Materials science Light extraction in LEDs business.industry Finite-difference time-domain method General Physics and Astronomy 02 engineering and technology engineering.material law.invention 020210 optoelectronics & photonics Optics Coating law 0202 electrical engineering electronic engineering information engineering engineering Optoelectronics Light emission business Light-emitting diode Diode Structured light |
| Zdroj: | Journal of the Korean Physical Society. 68:462-466 |
| ISSN: | 1976-8524 0374-4884 |
| Popis: | The results of our analysis, which was done by using the finite-difference, time-domain (FDTD) methods suggest that surface-structured light-emitting diodes (LEDs) with a subwavelength aluminum-nitride coating will have an enhanced light extraction efficiency. The use of such a LED structure will reduce both the internal reflection and the impedance mismatch, leading to a 3.2-fold enhancement in the light extraction efficiency compared to that for bare planar LEDs. We also present an improved method of modeling the light emission from the LED’s active layers to numerically calculate the light extraction efficiency of LEDs. |
| Databáze: | OpenAIRE |
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