GaN-based blue light-emitting diodes grown and fabricated on patterned sapphire substrates by metalorganic vapor-phase epitaxy

被引：59

作者：

Feng, ZH ^{[1
]}

Qi, YD ^{[1
]}

Lu, ZD ^{[1
]}

Lau, KM ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Elect & Elect Engn, Ctr Photon Technol, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF CRYSTAL GROWTH | 2004年 / 272卷 / 1-4期

关键词：

etching; metalorganic vapor phase epitaxy; nitrides; patterned sapphire substrate; semiconducting III-V materials; light-emitting diodes;

D O I：

10.1016/j.jcrysgro.2004.08.070

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

GaN-based blue light-emitting diodes (LEDs) with InGaN multi-quanturn-wells were grown on patterned sapphire substrates by metalorganic vapor-phase epitaxy (MOVPE). The patterned substrates with 60-nm-deep parallel grooves of different dimensions along < 1 1 2 0> and < 1 0 1 0> orientations were etched by BCl3/Cl-2-based inductively coupled plasma reactive ion etching (ICP-RIE). Enhancement of the electroluminescence (EL) peak at 465 nm from LEDs grown on these grooves has been observed, in comparison with LEDs grown on unpatterned sapphire substrates. A maximum power increase of 25% was measured for LEDs grown on patterned substrate with 2 mum (ridge) x 4 pm (trench) grooves along the < 1 0 1 0 > orientation at a forward current of 20 mA at room temperature. Stronger light emission in the trench regions of the stripes at very low drive currents has been observed using optical microscopy. Several possible mechanisms are proposed to interpret this groove-induced EL enhancement. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：327 / 332

页数：6

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