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Title: Band alignment of ultra-thin hetero-structure ZnO/TiO{sub 2} junction

Abstract

Graphical abstract: - Highlights: • Band alignment at the ZnO/TiO{sub 2} hetero-structural interface with different ZnO coating thickness was studied. • The valence band offset was decreased with increased ZnO coating layer thickness. • The interface dipole was responsible for the decreased band offset. - Abstract: The band alignment at the ZnO/TiO{sub 2} hetero-structure interface was measured by high resolution X-ray photoelectron spectroscopy. The valence band offset (E{sub ZnO}−E{sub TiO{sub 2}}){sub Valence} was linearly changed from 0.27 to 0.01 eV at the interface with increased ZnO coating thickness from 0.7 to 7 nm. The interface dipole presented at the ZnO/TiO{sub 2} interface was responsible for the decreased band offset. The band alignment of the ZnO/TiO{sub 2} heterojunction is a type II alignment.

Authors:
;  [1];  [1]
  1. Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026 (China)
Publication Date:
OSTI Identifier:
22348592
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 51; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DIPOLES; EV RANGE; INTERFACES; SPUTTERING; TITANIUM OXIDES; X-RAY PHOTOELECTRON SPECTROSCOPY; ZINC OXIDES

Citation Formats

Shen, Kai, Wu, Kunjie, Wang, Deliang, and CAS Key Laboratory of Energy Conversion Materials, University of Science and Technology of China, Hefei, Anhui 230026. Band alignment of ultra-thin hetero-structure ZnO/TiO{sub 2} junction. United States: N. p., 2014. Web. doi:10.1016/J.MATERRESBULL.2013.12.013.
Shen, Kai, Wu, Kunjie, Wang, Deliang, & CAS Key Laboratory of Energy Conversion Materials, University of Science and Technology of China, Hefei, Anhui 230026. Band alignment of ultra-thin hetero-structure ZnO/TiO{sub 2} junction. United States. https://doi.org/10.1016/J.MATERRESBULL.2013.12.013
Shen, Kai, Wu, Kunjie, Wang, Deliang, and CAS Key Laboratory of Energy Conversion Materials, University of Science and Technology of China, Hefei, Anhui 230026. 2014. "Band alignment of ultra-thin hetero-structure ZnO/TiO{sub 2} junction". United States. https://doi.org/10.1016/J.MATERRESBULL.2013.12.013.
@article{osti_22348592,
title = {Band alignment of ultra-thin hetero-structure ZnO/TiO{sub 2} junction},
author = {Shen, Kai and Wu, Kunjie and Wang, Deliang and CAS Key Laboratory of Energy Conversion Materials, University of Science and Technology of China, Hefei, Anhui 230026},
abstractNote = {Graphical abstract: - Highlights: • Band alignment at the ZnO/TiO{sub 2} hetero-structural interface with different ZnO coating thickness was studied. • The valence band offset was decreased with increased ZnO coating layer thickness. • The interface dipole was responsible for the decreased band offset. - Abstract: The band alignment at the ZnO/TiO{sub 2} hetero-structure interface was measured by high resolution X-ray photoelectron spectroscopy. The valence band offset (E{sub ZnO}−E{sub TiO{sub 2}}){sub Valence} was linearly changed from 0.27 to 0.01 eV at the interface with increased ZnO coating thickness from 0.7 to 7 nm. The interface dipole presented at the ZnO/TiO{sub 2} interface was responsible for the decreased band offset. The band alignment of the ZnO/TiO{sub 2} heterojunction is a type II alignment.},
doi = {10.1016/J.MATERRESBULL.2013.12.013},
url = {https://www.osti.gov/biblio/22348592}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 51,
place = {United States},
year = {Sat Mar 01 00:00:00 EST 2014},
month = {Sat Mar 01 00:00:00 EST 2014}
}