Multi-colour GaN-based LEDs with trench structure

Abstract Conventional white LEDs are implemented by converting part of the light generated from the blue multi-quantum well (MQW) into yellow light through a phosphor. However, in order to implement a white LED with higher efficiency, there is a need for a method capable of emitting multiple colours in GaN-based LED itself without a phosphor. In this study, the MQW is optimized through TCAD simulation and a trench structure is applied to implement a multi-colour LED.