Title :
Light Extraction Efficiency Enhancement of GaN Blue LED by Liquid-Phase-Deposited ZnO Rods
Author :
Lee, Ming-Kwei ; Ho, Chen-Lin ; Chen, Po-Chun
Author_Institution :
Nat. Sun Yat-sen Univ., Kaohsiung
Abstract :
We investigate the light extraction efficiency of a GaN light-emitting diode (LED) by using liquid-phase-deposited ZnO rods at near-room temperature. Zinc nitrate and hexamethylenetetramine were used as the deposition precursors. Compared with the conventional GaN LED, the optical power output of the GaN LED with crystalline ZnO rods on its surface has about 1.6 times enhancement.
Keywords :
II-VI semiconductors; III-V semiconductors; gallium compounds; light emitting diodes; liquid phase deposition; wide band gap semiconductors; zinc compounds; GaN-ZnO; blue LED; hexamethylenete-tramine; light extraction efficiency enhancement; light-emitting diode; liquid-phase-deposited rods; optical power output; temperature 293 K to 298 K; zinc nitrate; Brightness; Crystallization; Gallium nitride; Light emitting diodes; Liquid crystal displays; Optical films; Optical refraction; Optical variables control; Temperature; Zinc oxide; GaN light-emitting diode (LED); ZnO; light extraction efficiency; liquid phase deposition (LPD);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.913652
