Trapalis, A. orcid.org/0000-0003-4887-7058, Heffernan, J., Farrer, I. et al. (2 more authors) (2016) Structural, electrical, and optical characterization of as grown and oxidized zinc nitride thin films. Journal of Applied Physics, 120. 205102. ISSN 1089-7550
Abstract
Zinc Nitride (Zn3N2) films were grown by DC sputtering of a Zn target in N2 plasma under a variety of different growth conditions which resulted in the deposition of films with variable composition. The as deposited films exhibited a polycrystalline Zn3N2 structure which was converted to a ZnO-based structure after several weeks of ambient exposure. Zn3N2 films that were N-poor exhibited electrical properties indicative of a natively doped semiconductor and reached a minimum carrier concentration in the order of 1018 cm-3 at compositions which approached the stoichiometric ratio of Zn3N2. A maximum carrier mobility of 33 cm2 V-1 s-1 was obtained in Nrich films due to an improved microstructure. The Zn3N2 films had an optical band gap of 1.31- 1.48 eV and a refractive index of 2.3-2.7. Despite a wide range of Zn3N2 samples examined, little variation of its optical properties was observed, which suggests they are closely related to the band structure of this material. In contrast to the as grown films, the oxidized film had a band gap of 3.44 eV and the refractive index was 1.6-1.8, similar to ZnO and Zn(OH)2.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 AIP Publishing. This is an author produced version of a paper subsequently published in Journal of Applied Physics. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 16 Nov 2016 16:56 |
Last Modified: | 18 Jul 2017 17:20 |
Published Version: | https://doi.org/10.1063/1.4968545 |
Status: | Published |
Publisher: | American Institute of Physics |
Refereed: | Yes |
Identification Number: | 10.1063/1.4968545 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:107395 |