Enhanced Semiconductor Nanocrystal Conductance via Solution Grown Contacts

被引：112

作者：

Sheldon, Matthew T.

Trudeau, Paul-Emile

Mokari, Taleb ^{[1
]}

Wang, Lin-Wang ^{[2
]}

Alivisatos, A. Paul ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA

来源：

NANO LETTERS | 2009年 / 9卷 / 11期

关键词：

D O I：

10.1021/nl902186v

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report a 100000-fold increase in the conductance of individual CdSe nanorods when they are electrically contacted via direct solution phase growth of Au tips on the nanorod ends. Ensemble UV-vis and X-ray photoelectron spectroscopies Indicate this enhancement does not result from alloying of the nanorod. Rather, low temperature tunneling and high temperature (250-400 K) thermionic emission across the junction at the Au contact reveal a 75% lower interface barrier to conduction compared to a control sample. We correlate this barrier lowering with the electronic structure at the Au-CdSe interface. Our results emphasize the Importance of a nanocrystal surface structure for robust device performance and the advantage of this contact method.

引用

页码：3676 / 3682

页数：7

共 23 条

[1] Perspectives on the physical chemistry of semiconductor nanocrystals [J].