Auto-Split Laser Lift-Off Technique for Vertical-Injection GaN-Based Green Light-Emitting Diodes

Double Photonic Quasi-Crystal Structure Effect on GaN-Based Vertical-Injection Light- Emitting Diodes

10 GaN - based Light - Emitting Diodes

Light-emitting diodes (LEDs) offer several advantages over traditional light sources, such as smaller size, longer lifetime, higher efficiency, and greater mechanical ruggedness. Continuing developments in LED technology are producing devices with increased output power and efficiency as well as a wider range of colors [1]. Recent progress in the fabrication of GaN-based compound semiconductors...

The quantum efficiency of green GaInN/GaN light emitting diodes

Energy efficient lighting can be achieved by help of high efficiency light emitting diodes (LEDs). Substantial performance gains are feasible in the green – 500–555 nm – spectral region by implementing proper design of the active region. Here we analyze external quantum efficiency of high performing LED dies as a function of current and temperature in order to formulate relevant optimization ru...

Titanium oxide nanotube arrays for high light extraction efficiency of GaN-based vertical light-emitting diodes.

TiO2 nanotube (NT) arrays were fabricated on the surface of n-GaN through a liquid-phase conversion process using ZnO nanorods (NRs) as a template for high-efficiency InGaN/GaN multiple quantum well (MQW) vertical light-emitting diodes (VLEDs). The optical output power of the VLEDs with TiO2 NTs was remarkably enhanced by 23% and 189% at an injection current of 350 mA compared to those of VLEDs...

Green light emitting diodes on a-plane GaN bulk substrates

We report the development of 520–540 nm green light emitting diodes LEDs grown along the nonpolar a axis of GaN. GaInN /GaN-based quantum well structures were grown in homoepitaxy on both, a-plane bulk GaN and a-plane GaN on r-plane sapphire. LEDs on GaN show higher, virtually dislocation-free crystalline quality and three times higher light output power when compared to those on r-plane sapphi...