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Surface passivation of semiconducting oxides by self-assembled nanoparticles

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Park, Dae-Sung, Wang, Haiyuan, Vasheghani Farahani, Sepehr, Walker, Marc, Bhatnagar, Akash, Seghier, Djelloul, Choi, Chel-Jong, Kang, Jie-Hun and McConville, C. F. (Chris F.) (2016) Surface passivation of semiconducting oxides by self-assembled nanoparticles. Scientific Reports, 6 . 18449 . doi:10.1038/srep18449 ISSN 2045-2322.

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Official URL: http://dx.doi.org/10.1038/srep18449

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Abstract

Physiochemical interactions which occur at the surfaces of oxide materials can significantly impair their performance in many device applications. As a result, surface passivation of oxide materials has been attempted via several deposition methods and with a number of different inert materials. Here, we demonstrate a novel approach to passivate the surface of a versatile semiconducting oxide, zinc oxide (ZnO), evoking a self-assembly methodology. This is achieved via thermodynamic phase transformation, to passivate the surface of ZnO thin films with BeO nanoparticles. Our unique approach involves the use of BexZn1-xO (BZO) alloy as a starting material that ultimately yields the required coverage of secondary phase BeO nanoparticles, and prevents thermally-induced lattice dissociation and defect-mediated chemisorption, which are undesirable features observed at the surface of undoped ZnO. This approach to surface passivation will allow the use of semiconducting oxides in a variety of different electronic applications, while maintaining the inherent properties of the materials.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Optoelectronic devices
Journal or Publication Title: Scientific Reports
Publisher: Nature Publishing Group
ISSN: 2045-2322
Official Date: 13 January 2016
Dates:
DateEvent
13 January 2016Published
12 November 2015Accepted
21 August 2015Submitted
Volume: 6
Number of Pages: 13
Article Number: 18449
DOI: 10.1038/srep18449
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 8 December 2015
Date of first compliant Open Access: 27 January 2016
Funder: Birmingham Science City, Advantage West Midlands (AWM), European Regional Development Fund (ERDF), Engineering and Physical Sciences Research Council (EPSRC), University of Warwick Vice Chancellor Scholarship
Grant number: EP/G004625/1 (EPSRC)

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