TITLE:
Effect of the Cladding Layer Cavity on the Efficiency of 650 nm Resonant Cavity Light Emitting Diodes
AUTHORS:
Jianjun Li, Tao Liu, Jiachun Li, Xuan Ya
KEYWORDS:
650 nm; RCLED; MOCVD; DBR
JOURNAL NAME:
Optics and Photonics Journal,
Vol.3 No.2B,
July
23,
2013
ABSTRACT: High efficiency 650 nm resonant cavity
light emitting diodes (RCLEDs) with a cladding layer cavity are reported. The
epitaxial structure is grown with a metal-organic chemical vapor deposition
(MOCVD) system. Al 0.5Ga 0.5 As/Al As is used for the distributed Bragg reflectors (DBRs), and
GaInP/AlGaInP multiple-quantum wells for the active region. Two RCLED samples
have been fabricated, one with a cladding layer cavity and the other without.
Experimental results show that the cladding layer cavity can improve the
internal quantum efficiency effectively, so that an external quantum efficiency
of 7.4% at 20 mA is reached. Meanwhile, the sample with cladding layer cavity
also shows a spectral stability as the injected current changing from 20 mA to
100 mA.