Recent progresses on InGaN quantum dot light-emitting diodes

Abstract

InGaN quantum dots (QDs) have attracted many research interests in recent years for their potentials to realize long wavelength visible emission from green to red, which can pave a way to fabricate the phosphor-free white light emitting diodes (LEDs). In this paper, we reported our recent progresses on InGaN QD LEDs, the discussions were dedicated to the basic physics model of the strain relaxation in self-assembled InGaN QDs, the growth of InGaN QDs with a growth interruption method by metal organic vapor phase epitaxy, the optimization of GaN barrier growth in multilayer InGaN QDs, the demonstration of green, yellow-green and red InGaN QD LEDs, and future challenges.

Keywords

quantum dot (QD) / InGaN / light emitting diode (LED) / quantum confined Stark effect (QCSE)

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Acknowledgements

This work was supported by the National Basic Research Program of China (Nos. 2013CB632804, 2011CB301900 and 2012CB3155605), the National Natural Science Foundation of China (Grant Nos. 61176015, 61210014, 51002085, 61321004, 61307024 and 61176059), and the High Technology Research and Development Program of China (Nos. 2011AA03A112, 2011AA03A106, 2011AA03A105 and 2012AA050601).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg