Characteristics of ultraviolet nonpolar InGaN/GaN light-emitting diodes using trench epitaxial lateral overgrowth technology

Abstract

Ultraviolet nonpolar InGaN/GaN light-emitting diodes were grown on trench epitaxial lateral overgrowth (TELOG) a-plane GaN template by metalorganic chemical vapor deposition. Electroluminescence measurements revealed main peak at 373 nm when injection current was 40 mA. Furthermore, cathodeluminescence observed the low-defect density wings emitted 373 run peak and the TELOG coalescence areas emitted 443 nm due to different incorporation of indium, Meanwhile, polarization measurement shown a degree of ultraviolet peak is 28.7%.