Effects of a Reduced Effective Active Region Volume on Wavelength-Dependent Efficiency Droop of InGaN-Based Light-Emitting Diodes
Keyword(s):
In this study, wavelength-dependent efficiency droop phenomena in InGaN-based light-emitting diodes (LEDs) by a reduced effective active region volume were investigated. Different effective active region volumes can be extracted from theoretical fitting to the efficiency-versus-current curves of standard high efficiency InGaN near-ultraviolet, blue, and green LEDs. It has been found that the effective volume of the active region reduces more significantly with increasing emission wavelength, resulting in a lower onset-droop current density, as well as a more severe droop. Increasing the quantum well (QW) thickness to reduce carrier density is proposed as an effective way to alleviate the efficiency droop.
Keyword(s):
Keyword(s):
Keyword(s):
2010 ◽
Vol 43
(35)
◽
pp. 354004
◽
Keyword(s):
2010 ◽
Vol 54
(10)
◽
pp. 1119-1124
◽
Keyword(s):
2019 ◽
Vol 55
(5)
◽
pp. 1-7
◽
2013 ◽
Vol 52
(8S)
◽
pp. 08JL17
◽
Keyword(s):