Playing with Dimensions: Rational Design for Heteroepitaxial p鈥搉 Junctions

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• 作者：Tae Il Lee ; Sang Hoon Lee ; Young-Dong Kim ; Woo Soon Jang ; Jin Young Oh ; Hong ; Koo Baik ; Catherine Stampfl ; Aloysius Soon ; Jae Min Myoung
• 刊名：Nano Letters
• 出版年：2012
• 出版时间：January 11, 2012
• 年：2012
• 卷：12
• 期：1
• 页码：68-76
• 全文大小：640K
• 年卷期：v.12,no.1(January 11, 2012)
• ISSN：1530-6992

文摘

A design for a heteroepitaxial junction by the way of one-dimensional wurzite on a two-dimensional spinel structure in a low-temperature solution process was introduced, and it's capability was confirmed by successful fabrication of a diode consisting of p-type cobalt oxide (Co₃O₄) nanoplate/n-type zinc oxide (ZnO) nanorods, showing reasonable electrical performance. During thermal decomposition, the 30掳 rotated lattice orientation of Co₃O₄ nanoplates from the orientation of 尾-Co(OH)₂ nanoplates was directly observed using high-resolution transmission electron microscopy. The epitaxial relations and the surface stress-induced ZnO nanowire growth on Co₃O₄ were well supported using the first-principles calculations. Over the large area, (0001) preferred oriented ZnO nanorods epitaxially grown on the (111) plane of Co₃O₄ nanoplates were experimentally obtained. Using this epitaxial p鈥搉 junction, a diode was fabricated. The ideality factor, turn-on voltage, and rectifying ratio of the diode were measured to be 2.38, 2.5 V and 10⁴, respectively.

Keywords:

Epitaxial growth; spinel cobalt (II,III) oxide nanoplate; wurzite ZnO nanorod; heterogeneous p鈭抧 junction