Abstract：
:We report the development of complete structural AlGaN-based deep-ultraviolet light-emitting diodes with an aluminum thin layer for increasing light extraction efficiency. A 217% enhancement in peak photoluminescence intensity at 294 nm is observed. Cathodoluminescence measurement demonstrates that the internal quantum efficiency of the deep-UV LEDs coated with Al layer is not enhanced. The emission enhancement of deep-UV LEDs is attributed to the higher LEE by the surface plasmon-transverse magnetic wave coupling. When the proportion of the TM wave to the Al layer increases with the Al content in the Al(x)Ga(1-x)N multiple quantum wells, i.e., the band edge emission energy, the enhancement ratio of the Al-coated deep-UV LEDs increases.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Gao N,Huang K,Li J,Li S,Yang X,Kang Jdoi
10.1038/srep00816subject
Has Abstractpub_date
2012-01-01 00:00:00pages
816issn
2045-2322journal_volume
2pub_type
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