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A Study of the Optical Band Gap of Lithium Tungsten Trioxide Thin Films

Published online by Cambridge University Press:  28 February 2011

G. Berera ,
R.B. Goldner ,
F.O. Amtz ,
K.K. Wong ,
A. Ciaccia ,
M. Welch ,
T.E. Haas  and
L. Jauniskis
G. Berera
Affiliation:
Electro-Optics Technology Center, Tufts University, Medford MA 02155
R.B. Goldner
Affiliation:
Electro-Optics Technology Center, Tufts University, Medford MA 02155
F.O. Amtz
Affiliation:
Electro-Optics Technology Center, Tufts University, Medford MA 02155
K.K. Wong
Affiliation:
Electro-Optics Technology Center, Tufts University, Medford MA 02155
A. Ciaccia
Affiliation:
Electro-Optics Technology Center, Tufts University, Medford MA 02155
M. Welch
Affiliation:
Electro-Optics Technology Center, Tufts University, Medford MA 02155
T.E. Haas
Affiliation:
Electro-Optics Technology Center, Tufts University, Medford MA 02155
L. Jauniskis
Affiliation:
Electro-Optics Technology Center, Tufts University, Medford MA 02155
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Abstract

The insertion of lithium (lithiation) into tungsten trioxide results in the formation of the tungsten bronze LixWO3. Polycrystalline, rf sputter deposited thin films of LixWO3 were investigated for their application in Smart Window Devices. The optical band gap studies of these films revealed the narrowing of the intrinsic band gap as a consequence of lithium insertion. The results suggest that the rigid band model, which is generally adopted in interpreting the electronic structure of the tungsten bronzes may not be applicable in Lix WO3.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 210: Symposium L – Solid State Ionics II , 1990 , 69
Copyright
Copyright © Materials Research Society 1991

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