Abstract
The lateral current spreading (CS) effect on the efficiency droop in GaN-based
LEDs has been studied in terms of the CS distance (L<sub>cs</sub>) using a designed
pattern with the 2-D current spreading profile. The correlations of CS effect with the
electrical, luminescent and electric-thermal properties of the LEDs have been discussed.
LEDs with the L<sub>cs</sub> longer than the theoretically calculated effective CS
length (L<sub>eff</sub>) suffer from more serious efficiency droop and the degradation
of luminescent properties. However, the influence of CS effect on the ideality factors
of LEDs is not obvious. Higher chip temperature caused by poor CS was observed and may
further enlarge the efficiency droop.
© 2013 IEEE
PDF Article
More Like This
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 Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription