Morphology Control and Electroluminescence of ZnO Nanorod/GaN Heterojunctions Prepared Using Aqueous Solution
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- 作者：Sam-Dong Lee ; Yoon-Seok Kim ; Min-Su Yi ; Jae-Young Choi ; Sang-Woo Kim
- 刊名：Journal of Physical Chemistry C
- 出版年：2009
- 出版时间：May 21, 2009
- 年：2009
- 卷：113
- 期：20
- 页码：8954-8958
- 全文大小：258K
- 年卷期：v.113,no.20(May 21, 2009)
- ISSN：1932-7455
文摘
We report on the morphology control and electroluminescence of well-aligned ZnO nanorod/p-GaN heterojunctions prepared by an aqueous solution route at low temperature (90 °C). We found that the density and size of the grown nanorods and microrods depended significantly on the ZnO seed density. Synchrotron X-ray scattering measurements showed an epitaxial relationship between the ZnO nanorods and the p-GaN thin film. ZnO nanorod/p-GaN heterojunction light-emitting diodes (LEDs) with an individual chip size of 300 × 300 μm2 were fabricated. Room-temperature electroluminescence spectra in the visible range were obtained from the LED at forward bias voltage. This result indicates that such heterojunction LEDs fabricated from solution are a promising approach for realizing large-area light-emitting sources that have high external quantum efficiency.