ZnO-ZnTe nanocone heterojunctions

Sang Hyun Lee, X. G. Zhang, Barton Smith, Sung Seok A. Seo, Zane W. Bell, Jun Xu

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We report heterojunctions made of vertically aligned ZnO-ZnTe nanocones synthesized using a combination of thermal vapor deposition and pulsed-laser deposition. ZnO nanocones and nanorods were controlled by utilizing the growth rate difference between central and boundary sites of precursor domains. The p-n heterojunctions were subsequently formed by growing ZnTe as shells on the nanocone surface. Structural and electric characteristics indicate that nanocones are more feasible than nanorods for forming heterojunction. Furthermore, theoretical modeling demonstrates that the nanocone-based junction exhibits an electrostatic potential profile that is much more effective for carrier transport than the electrostatic potential for the nanorod-based junction.

Original languageEnglish
Article number193116
JournalApplied Physics Letters
Volume96
Issue number19
DOIs
StatePublished - 2010

Bibliographical note

Funding Information:
The authors thank Jane Howe, G. E. Jellison, Jr., and H. N. Lee of ORNL and An-Jen Chen of the University of Minnesota for their inputs. This work was supported by the U.S. Department of Energy, National Nuclear Security Administration, under Contract No. DE-AC05-00OR22725 with ORNL. The synthesis of ZnO nanocones was supported by the Laboratory Directed Research and Development Program of ORNL.

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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