| Autor: |
Gabriel Halpin, Travis Robinson, Xiaomin Jin, Xiang-Ning Kang, Guo-Ying Zhang |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
IEEE Photonics Journal, Vol 6, Iss 3, Pp 1-10 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
1943-0655 |
| DOI: |
10.1109/JPHOT.2014.2323296 |
| Popis: |
This study reveals the effect of nanoscale ITO transmission gratings on light emission from the top, sides, and bottom of a GaN light-emitting diode (LED), based on the substrate standing wave analysis. First, we show that sapphire substrate thickness affects the standing wave pattern in the LED and find the best- and worst-case sapphire thicknesses. Second, we find that adding nanoscale ITO transmission gratings can improve light extraction by 222% or 253%, depending on the reference chosen. Third, we observe that maximizing top light emission with the nano-grating can significantly reduce bottom and side light emissions. Finally, we study grating performance over different wavelengths and generate the LED spectrum. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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