Surface charging at the (1 0 0) surface of Cu doped and undoped Li2B4O7

Authors

Jie Xiao, University of Nebraska - Lincoln
N. Lozova, Louisiana State University
Ya. B. Losovyj, University of Nebraska - Lincoln
D. Wooten, Air Force Institute of Technology
I. Ketsman, University of Nebraska - Lincoln
M. W. Swinney, Air Force Institute of Technology
J. Petrosky, Air Force Institute of Technology
J. McClory, Air Force Institute of Technology
Ya. V. Burak, Institute of Physical Optics
V. T. Adamiv, Institute of Physical Optics
A. T. Brant, West Virginia University
P. A. Dowben, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2011

Citation

Applied Surface Science 257 (2011) 3399–3403

Comments

© 2010 Elsevier B.V.

This document is a U.S. government work and is not subject to copyright in the United States.

doi:10.1016/j.apsusc.2010.11.033

Abstract

Wehave compared the photovoltaic charging of the (100) surface termination for Cu doped and undoped Li₂B₄O₇. While the surface charging at the (100) surface of Li₂B₄O₇ is significantly greater than observed at (110) surface, the Cu doping plays a role in reducing the surface photovoltage effects. With Cu doping of Li₂B₄O₇, the surface photovoltaic charging is much diminished at the (100) surface. The density of states observed with combined photoemission and inverse photoemission remains similar to that observed for the undoped material, except in the vicinity of the conduction band edge.