Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 287, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2022.116097
Keywords
Ultraviolet; Quantum wells; Light-emitting diodes; AlN; SiLENSeTM; Internal Quantum Efficiency (IQE)
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The influence of the p-AlN layer on electron leakage in 232 nm ultraviolet wavelength light-emitting diodes was numerically investigated. It was found that employing p-AlN not only enhances hole concentration but also suppresses electron leakage notably.
The influence of the p-AlN layer on the electron leakage, in 232 nm ultraviolet wavelength light-emitting diodes, has been numerically investigated. We sandwiched last quantum barrier (LQB) with p-AlN layer to lower effective barrier heights in the p-region of the device. The simulation results demonstrate that employing p-AlN not only enhances hole concentration but also suppresses electron leakage notably. Employing p-AlN layer, after LQB, works as an efficient p-EBL due to its higher effective conduction band offset. LED with p-AlN layer exhibits almost no droop. Based on these results, we believe that this study may provide a feasible approach for the development of efficient 232 nm deep ultraviolet (DUV) LEDs, which is a crucial wavelength in the disinfection processes.
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