AlGaN-based deep UV light emitting diodes with peak emission below 255 nm

Alireza Yasan; Ryan McClintock; Kathryn Mayes; Patrick Kung; Manijeh Razeghi

doi:10.1117/12.597078

25 March 2005 AlGaN-based deep UV light emitting diodes with peak emission below 255 nm

Alireza Yasan, Ryan McClintock, Kathryn Mayes, Patrick Kung, Manijeh Razeghi

Proceedings Volume 5732, Quantum Sensing and Nanophotonic Devices II; (2005) https://doi.org/10.1117/12.597078
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

We report on the growth and fabrication of AlGaN-based deep ultraviolet light-emitting diodes (LEDs) with peak emission of below 255 nm. In order to achieve such short wavelength UV LEDs, the Al mole fractions in the device layers should be greater than ~60%. This introdues serious challenges on the growth and doping of Al_xGa_1-xN epilayers. However, with the aid of a high-quality AlN template layer and refinement of the growth conditions we have been able to demonstrate UV LEDs emitting below 255 nm. The ratio of the intensity of the electroluminescence primary peak to that of the secondary peak (related to Mg deep levels) is ~ 18:1 at moderate injection current levels. Milliwatt level output powers have been achieved for these deep UV LEDs.

Citation Download Citation

Alireza Yasan, Ryan McClintock, Kathryn Mayes, Patrick Kung, and Manijeh Razeghi "AlGaN-based deep UV light emitting diodes with peak emission below 255 nm", Proc. SPIE 5732, Quantum Sensing and Nanophotonic Devices II, (25 March 2005); https://doi.org/10.1117/12.597078

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