期刊
APPLIED PHYSICS LETTERS
卷 121, 期 2, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0093403
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资金
- U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under the Building Technologies Office [DE-EE0009163]
In this paper, p-down green emitting LEDs with low turn-on voltage enabled by efficient tunnel junctions were demonstrated. The reduction of electrostatic depletion barrier for electron and hole injection was achieved by the polarization field alignment in the (In,Ga)N/GaN interface with p-down orientation. A single (In,Ga)N/GaN heterostructure quantum well active region with a GaN homojunction tunnel junction showed very low forward operating voltage and excellent electroluminescence emission at high current densities.
We demonstrate p-down green emitting LEDs with low turn-on voltage enabled by efficient tunnel junctions. Due to the polarization field alignment in the (In,Ga)N/GaN interface with the p-down orientation, the electrostatic depletion barrier for electron and hole injection is reduced when compared with the conventional p-up LEDs. A single (In,Ga)N/GaN heterostructure quantum well active region with a GaN homojunction tunnel junction exhibited very low forward operating voltage of 2.42V at 20 A/cm(2) with a peak electroluminescence emission wavelength of 520 nm for current densities above 100 A/cm(2). The bottom tunnel junction with minimal voltage drop enabled excellent hole injection into the bottom p-GaN layer.
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