A simple low temperature synthesis route for ZnO-MgO core-shell nanowires

被引：125

作者：

Plank, N. O. V. ^{[1
]}

Snaith, H. J. ^{[2
]}

Ducati, C. ^{[3
]}

Bendall, J. S. ^{[1
]}

Schmidt-Mende, L. ^{[4
,5
]}

Welland, M. E. ^{[1
]}

机构：

[1] Univ Cambridge, Nanosci Ctr, Dept Engn, Cambridge CB3 0FF, England

[2] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[3] Univ Cambridge, Dept Mat Sci, Cambridge CB2 3QZ, England

[4] Univ Munich, Dept Phys, D-80799 Munich, Germany

[5] Univ Munich, Ctr Nanosci, D-80799 Munich, Germany

来源：

NANOTECHNOLOGY | 2008年 / 19卷 / 46期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1088/0957-4484/19/46/465603

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report a hydrothermal synthesis method for MgO shell coatings directly onto the surface of ZnO nanowire arrays. The entire process can be carried out below 100 degrees C. The MgO shells are produced by the addition of 10 mM magnesium nitrate with 0.2 M sodium hydroxide in water, resulting in a shell thickness of up to 8 nm, verified by high resolution transmission electron microscopy. The viability of the MgO layer as a functional element of optoelectronic devices was tested on solid-state organic hole-transporter based dye-sensitized solar cells. Incorporation of the MgO shell into the solar cell resulted in substantive efficiency improvements of over 400% in comparison to the pristine ZnO nanowire based photovoltaics, indicating that electrons can efficiently tunnel through the 'insulating' MgO shell.

引用

页数：8

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