By Topic

Modifying the improved light-output intensity of AlGaInP-based LEDs by nanoporous alimina

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

6 Author(s)
Chien-Chun Wang ; Inst. of Electro-Opt. Sci. & Eng., Nat. Cheng-Kung Univ., Tainan ; Chien-Chih Liu ; Kwok-Keung Chong ; Chen-I Hung
more authors

This investigation describes the development of AlGaInP light-emitting diodes (LEDs) with a nanometer diameter of porous anodic alumina (PAA) films which are formed by anodization technique to improve and modify the light extraction efficiency. The pore-widening time was changed for surface modulation to obtain the optimum light extraction efficiency. The diameter of nano-pores varies from 30 nm to 60 nm and the interpore spacing is about 75 nm. The light output intensity of the PAA LEDs with 40 minutes pore-widening is 1.39 times that of conventional LEDs. PAA films can effectively reduce critical angle loss, Fresnel loss and be used as scattering center to improve the light extraction.

Published in:

Indium Phosphide and Related Materials, 2008. IPRM 2008. 20th International Conference on

Date of Conference:

25-29 May 2008