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Title: Theory of the Color Change of NaxWO3 as a Function of Na-Charge Doping

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics

We report theoretical investigations of the coloration of WO{sub 3} upon charge insertion using sodium tungsten bronze (Na{sub x}WO{sub 3}) as a model system. Our results explain well the systematic color change of Na{sub x}WO{sub 3} from dark blue to violet, red-orange, and finally to golden yellow as sodium concentration x increases from 0.3 to unity. Proper accounts for both the interband and the intraband contributions to the optical response are found to be very important for a detailed understanding of the coloration mechanism in this system.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC36-08GO28308
OSTI ID:
1021217
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 79, Issue 20, 2009; Related Information: Article No. 205113
Country of Publication:
United States
Language:
English