Optical properties of electrochromic vanadium pentoxide

Journal Article · Tue Aug 01 04:00:00 EDT 1989 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.344432· OSTI ID:6093509

Cogan, S F; Nguyen, N M; Perrotti, S J; Rauh, R D

Electrochemical and spectroscopic measurements were used to characterize the electrochromic behavior of sputtered V/sub 2/O/sub 5/ films. In response to lithium intercalation, the fundamental optical absorption edge of V/sub 2/O/sub 5/ shifts to high energies by 0.20--0.31 eV as the lithium concentration increases from Li/sub 0.0/V/sub 2/O/sub 5/ to Li/sub 0.86/V/sub 2/O/sub 5/. There is a corresponding increase in the near-infrared absorption that exhibits Beer's law behavior at low lithium concentrations. The shift in absorption edge results in a large decrease in absorbance in the 350--450 nm wavelength range. This effect is most prevalent in thin films which exhibit a yellow to colorless optical modulation on lithium intercalation. The cathodic coloration in the near infrared is relatively weak with a maximum coloration efficiency of 35 cm/sup 2//C.

• Research Organization: EIC Laboratories Incorporated, 111 Downey Street, Norwood, Massachusetts 02062(US)
• OSTI ID: 6093509
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 66:3; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METALS
CHALCOGENIDES
CHEMISTRY
CLATHRATES
ELECTRO-OPTICAL EFFECTS
ELECTROCHEMISTRY
ELECTROCHROMISM
ELECTROMAGNETIC RADIATION
ELEMENTS
FILMS
INFRARED RADIATION
LITHIUM
METALS
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SPECTROSCOPY
SPUTTERING
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES