Effects of the microstructure slab with pillars on light extraction of GaN light-emitting diode

• 来源期刊: 中国物理（英文版）
• 关键词: photonic crystal light-emitting diodes CaN
• 年，卷（期）: 2006,（4）
• 页码范围: 702-707
• 页数: 6页
• 语种: 英文

摘要

The Dositive z direction relative light-extraction efficiency of GaN light-emitting diodes with microstructure slab is calculated by three-dimensional finite-difference time-domain method,where the microstructure slab consists of a graphite lattice of pillars.The results show that the two-dimensional graphite-arranged pillars suppress light extraction.When there is a thick pillar in the middle of the pillars,the structure can enhance light extraction of the light-emitting diodes.The tower-like pillars,which are thin on the top of the pillars and thick on the bottom of the pillars,benefit the light extraction when the angle of the tower-like pillars is proper.