Studies of improving light extraction efficiency of high power blue light-emitting diode by photo-enhanced chemical etching
| Autor: | Zheng Chen, Tao Dai, Zelian Qin, Xiang Ning Kang, C.Y. Hu, G. Y. Zhang, Hao Fang, Bing Zhang |
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| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Materials science genetic structures business.industry Extraction (chemistry) Gallium nitride Condensed Matter Physics Isotropic etching Power (physics) law.invention Inorganic Chemistry chemistry.chemical_compound Optics chemistry Etching (microfabrication) law Materials Chemistry Optoelectronics business Inorganic compound Diode Light-emitting diode |
| Zdroj: | Journal of Crystal Growth. 298:703-705 |
| ISSN: | 0022-0248 |
| DOI: | 10.1016/j.jcrysgro.2006.10.124 |
| Popis: | The n-type GaN layers of high power blue light-emitting diodes (LEDs) were roughened successfully and formed a “cone-like” surface by photo-enhanced chemical (PEC) etching method. As a result, the extraction efficiency of the surface roughened LED increased. A simple model has been constructed to explain the relationship between the hexagonal cones and the extraction efficiency of roughened surface. A promising effect as high as 2.5 folds of surface roughing was predicted by the model. |
| Databáze: | OpenAIRE |
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