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We demonstrate a 243 nm deep-ultraviolet (deep-UV) GaN/AlN heterostructure light-emitting diode with and without a tunnel-junction p-contact. Optical emission occurs from 2 monolayer thick GaN quantum structure active regions. Use of a tunnel-junction enhances the current density under forward bias.
Deep UV (DUV) light-emitting diodes (LEDs) are finding increased application in many areas including water purification and sterilization. Sub-270 nm emission is ideal for these applications since bacterial DNA absorbs strongly in this wavelength regime. To extract high energy photons (∼5 eV), the LED cladding regions must be transparent and therefore consist of high Aluminum content (>60%) n-...
Wide-bandgap materials, particularly Gallium Nitride, have emerged as the platform underlying many of the most promising technologies in the high-power and high-frequency domain. However, GaN p-channel devices lag far behind their popular n-channel counterparts, due to lower mobilities as well as difficulties in doping and forming ohmic contacts. There is a strong need for wide-bandgap p-channel FETs...
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