Abstract

We report a threefold enhancement of light-emission intensity at λ=460nm and a 16-fold extraction-efficiency enhancement measured from a 2D array of nanorod LEDs. The nano-LEDs are randomly arranged and have a typical rod diameter of 100250nm. From a combination of photoluminescence, reflectance, and excitation power-dependence measurements, we show that the enhanced emission is due mainly to modification of the extraction efficiency, and not to that of the internal efficiency. Furthermore, we show that the extraction enhancement originates from the randomness of the 2D array that scatters light efficiently into the air and the smallness of the nanorods that eliminates the guiding modes that trap light.

© 2009 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
An improvement of light extraction efficiency for GaN-based light emitting diodes by selective etched nanorods in periodic microholes

Seung Hwan Kim, Hyun Ho Park, Young Ho Song, Hyung Jo Park, Jae Beom Kim, Seong Ran Jeon, Hyun Jeong, Mun Seok Jeong, and Gye Mo Yang
Opt. Express 21(6) 7125-7130 (2013)

Enhanced light extraction from GaN based light-emitting diodes using a hemispherical NiCoO lens

Do-Hyun Kim, Dong Su Shin, and Jinsub Park
Opt. Express 22(S4) A1071-A1078 (2014)

Enhanced light extraction in wafer-bonded p-side-up thin-film AlGaInP light emitting diodes via zinc oxide nanorods

Ming-Chun Tseng, Dong-Sing Wuu, Chi-Lu Chen, Hsin-Ying Lee, Yu-Chang Lin, and Ray-Hua Horng
Opt. Mater. Express 6(10) 3293-3302 (2016)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription