Novel approaches for high-efficiency InGaN quantum wells light-emitting diodes: device physics and epitaxy engineering
2011
The challenges and approaches for high-efficiency InGaN quantum wells (QWs) light-emitting diodes (LEDs) are
presented. The studies include designs, growths, and device characteristics of 1) InGaN-based QWs LEDs with
enhanced matrix element for realizing green-emitting LEDs with high internal quantum efficiency, and 2) InGaN QW
LEDs device structure with lattice-matched AlInN-barrier to suppress efficiency-droop in nitride LEDs. Other
approaches to improve the efficiency of the nitride LEDs will be discussed as follow: 1) surface plasmon LEDs, 2) new
growth approach for dislocation density reduction in GaN, and 3) novel approaches for light extraction efficiency
improvement of III-Nitride LEDs.
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