Link to the University of Pittsburgh Homepage
Link to the University Library System Homepage Link to the Contact Us Form

Electron emission of Au nanoparticles embedded in ZnO for highly conductive oxide

Huang, PS and Kim, DH and Lee, JK (2014) Electron emission of Au nanoparticles embedded in ZnO for highly conductive oxide. Applied Physics Letters, 104 (14). ISSN 0003-6951

[img]
Preview
PDF
Available under License : See the attached license file.

Download (1MB) | Preview
[img] Plain Text (licence)
Available under License : See the attached license file.

Download (1kB)

Abstract

We investigated the effect of embedded Au nanoparticles (Au NPs) on electrical properties of zinc oxide (ZnO) for highly conductive oxide semiconductor. Au NPs in ZnO films influenced both the structural and electrical properties of the mixture films. The electrical resistivity decreases by as much as five orders of magnitude. This is explained by the electron emission from Au NPs to the ZnO matrix. Temperature-dependent Hall effect measurements show that an electron emission mechanism changes from tunneling to thermionic emission at T = 180 K. The electron mobility in the mixture film is mainly limited by the grain boundaries at lower temperature (80-180 K), and the Au/ZnO heterogeneous interface at higher temperature (180-340 K). In addition to the electron emission, embedded Au NPs alter the ZnO matrix microstructure and improve the electron mobility. Compared to the undoped ZnO film, the carrier concentration of the Au NP-embedded ZnO film can be increased by as much as six orders of magnitude with a small change in the carrier mobility. This result suggests a way to circumvent the inherent tradeoff between the carrier concentration and the carrier mobility in transparent conductive oxide (TCO) materials. © 2014 AIP Publishing LLC.


Share

Citation/Export:
Social Networking:
Share |

Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Huang, PS
Kim, DH
Lee, JKjul37@pitt.eduJUL370000-0002-7778-7679
Centers: Other Centers, Institutes, Offices, or Units > Petersen Institute of NanoScience and Engineering
Date: 7 April 2014
Date Type: Publication
Journal or Publication Title: Applied Physics Letters
Volume: 104
Number: 14
DOI or Unique Handle: 10.1063/1.4870648
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Refereed: Yes
ISSN: 0003-6951
Date Deposited: 17 Oct 2014 15:23
Last Modified: 02 Feb 2019 21:55
URI: http://d-scholarship.pitt.edu/id/eprint/23275

Metrics

Monthly Views for the past 3 years

Plum Analytics

Altmetric.com


Actions (login required)

View Item View Item