High-performance nanowire ultraviolet light-emitting diodes with potassium hydroxide and ammonium sulfide surface passivation
Ha Quoc Thang Bui, Ravi Teja Velpula, Barsha Jian, Moab Rajan Philip, Hien D. Tong, Trupti Ranjan Lenka, Hieu Pham Trung Nguyen
Abstract
have been used as a surface passivation treatment to improve the electrical and optical performance of AlGaN nanowire ultraviolet (UV) light-emitting diodes (LEDs). Enhancements in photoluminescence at 335 nm (49%), optical output power (65%), and electroluminescence (83%), with respect to the as-grown nanowire LED are recorded for the AlGaN nanowire UV LEDs with surface passivation. These enhancements are attributed to the reduced nonradiative recombination on the nanowire surfaces. This study provides a potential surface passivation approach to produce high-power AlGaN nanowire LEDs operating in the UV spectrum.
Topics & Concepts
PassivationMaterials scienceLight-emitting diodeOptoelectronicsUltravioletNanowireElectroluminescencePotassium hydroxideDiodePhotoluminescenceNanotechnologyChemical engineeringLayer (electronics)EngineeringGaN-based semiconductor devices and materialsGa2O3 and related materialsZnO doping and properties