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Title: Interface Structure, Band Alignment, and Built-In Potentials at LaFeO 3 / n - SrTiO 3 Heterojunctions

Abstract

We demonstrate that LaFeO 3/n-SrTiO 3(001) heterojunctions engineered to have opposite interface polarities exhibit very similar band offsets and built-in potentials within the LaFeO 3 layer of the same sign. However, heterojunctions with the TiO20-LaO+ interface structure attract electronic charge from the n-STO substrate, whereas those with the SrO0-FeO2-1 interface structure do not. These results suggest that the latter would more effectively facilitate photogenerated electron-hole pair separation than the former, an important result for photoelectrochemical water splitting

Authors:
;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1339821
Report Number(s):
PNNL-SA-119599
Journal ID: ISSN 0031-9007; PRLTAO; 48341; KC0203020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Environmental Molecular Sciences Laboratory

Citation Formats

Comes, Ryan, and Chambers, Scott. Interface Structure, Band Alignment, and Built-In Potentials at LaFeO3/n-SrTiO3 Heterojunctions. United States: N. p., 2016. Web. doi:10.1103/PhysRevLett.117.226802.
Comes, Ryan, & Chambers, Scott. Interface Structure, Band Alignment, and Built-In Potentials at LaFeO3/n-SrTiO3 Heterojunctions. United States. https://doi.org/10.1103/PhysRevLett.117.226802
Comes, Ryan, and Chambers, Scott. Tue . "Interface Structure, Band Alignment, and Built-In Potentials at LaFeO3/n-SrTiO3 Heterojunctions". United States. https://doi.org/10.1103/PhysRevLett.117.226802.
@article{osti_1339821,
title = {Interface Structure, Band Alignment, and Built-In Potentials at LaFeO3/n-SrTiO3 Heterojunctions},
author = {Comes, Ryan and Chambers, Scott},
abstractNote = {We demonstrate that LaFeO3/n-SrTiO3(001) heterojunctions engineered to have opposite interface polarities exhibit very similar band offsets and built-in potentials within the LaFeO3 layer of the same sign. However, heterojunctions with the TiO20-LaO+ interface structure attract electronic charge from the n-STO substrate, whereas those with the SrO0-FeO2-1 interface structure do not. These results suggest that the latter would more effectively facilitate photogenerated electron-hole pair separation than the former, an important result for photoelectrochemical water splitting},
doi = {10.1103/PhysRevLett.117.226802},
url = {https://www.osti.gov/biblio/1339821}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 22,
volume = 117,
place = {United States},
year = {2016},
month = {11}
}