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题名: Synthesis and characterization of ZnO nanorods and nanoflowers grown on GaN-based LED epiwafer using a solution deposition method
作者: Gao HY (Gao Haiyong);  Yan FW (Yan Fawang);  Li JM (Li Jinmin);  Zeng YP (Zeng Yiping);  Wang JX (Wang Junxi)
发表日期: 2007
摘要: We report the growth of hexagonal ZnO nanorods and nanoflowers on GaN-based LED epiwafer using a solution deposition method. We also discuss the mechanisms of epitaxial nucleation and of the growth of ZnO nanorods and nanoflowers. A GaN-based LED epiwafer was first deposited on a sapphire substrate by MOCVD with no electrode being fabricated on it. Vertically aligned ZnO nanorods with an average height of similar to 2.4 mu m were then grown on the LED epiwafer, and nanoflowers were synthesized on the nanorods. The growth orientation of the nanorods was perpendicular to the surface, and the synthesized nanoflowers were composed of nanorods. The micro-Raman spectra of the ZnO nanorods and nanoflowers are similar and both exhibit the E-2 (high) mode and the second-order multiple-phonon mode. The photoluminescence spectrum of ZnO nanostructures exhibits ultraviolet emission centred at about 380 nm and a broad and enhanced green emission centred at about 526 nm. The green emission of the ZnO nanostructures combined with the emission of InGaN quantum wells provides a valuable method to improve the colour rendering index (CRI) of LEDs.
KOS主题词: Chemical vapor deposition;  atomic layer deposition;  Vapor-plating
刊名: JOURNAL OF PHYSICS D-APPLIED PHYSICS
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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Gao, HY (Gao, Haiyong); Yan, FW (Yan, Fawang); Li, JM (Li, Jinmin); Zeng, YP (Zeng, Yiping); Wang, JX (Wang, Junxi) .Synthesis and characterization of ZnO nanorods and nanoflowers grown on GaN-based LED epiwafer using a solution deposition method ,JOURNAL OF PHYSICS D-APPLIED PHYSICS,JUN 21 2007,40 (12):3654-3659
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