Browsing by Author "Jiang, Ren Hao"

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Fabricated nano-disk InGaN/GaN multi-quantum well of the inverse hexagonal pyramids
(2008-02-01)
Yang, Chung-Chleh
;
Dai, Jing-He
;
Jiang, Ren Hao
;
Zheng, Jing-Hul
;
Lin, Chia-Feng
Self-assembled inverted hexagonal pyramids with GaN:Mg and InGaN/GaN multi-quantum-well (MQW) structures were formed through photoelectrochemical wet etching. The formation mechanism of the inverted hexagonal pyramid consisted with a lateral etching process of the InGaN/GaN active layer, bottom-up etching process from N-face GaN direction, and anisotropic etching process. The Photoluminescence (PL) intensity of GaN:Mg peak was enhanced in this inverted hexagonal pyramid caused by the quantum confinement effect of this nano-structure. These inverted hexagonal pyramids, consisting of the p-type GaN:Mg, nano-disk InGaN/GaN active layer, and n-type GaN:Si layer, are suitable for nano-scale optoelectronic devices. (c) 2007 Published by Elsevier Ltd.