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1.	Rojas González, Edgar Alonso, et al. (författare) Coloration of tungsten oxide electrochromic thin films at high bias potentials and low intercalation levels 2020 Ingår i: Materials Letters: X. - : Elsevier BV. - 2590-1508. ; 7:100048 Tidskriftsartikel (refereegranskat)abstract The optical absorption of amorphous tungsten oxide thin films was studied at low intercalation levels. The electronic density of states was obtained by an electrochemical method and bias potential regions were assigned to the conduction band and gap states according to the experimentally estimated conduction band edge. Differences between the coloration in the conduction band and gap states were observed when comparing the experimental results to a theoretical site-saturation model that considers electronic transitions between localized tungsten sites. The model could reproduce the optical response due to conduction band states. However, it underestimated the rate of change of the optical absorption coefficient with intercalation level for gap states. This discrepancy is discussed in the context of small-polaron optical absorption.

Rojas González, Edgar Alonso, et al. (författare)
Coloration of tungsten oxide electrochromic thin films at high bias potentials and low intercalation levels
2020
Ingår i: Materials Letters: X. - : Elsevier BV. - 2590-1508. ; 7:100048
Tidskriftsartikel (refereegranskat)abstract
- The optical absorption of amorphous tungsten oxide thin films was studied at low intercalation levels. The electronic density of states was obtained by an electrochemical method and bias potential regions were assigned to the conduction band and gap states according to the experimentally estimated conduction band edge. Differences between the coloration in the conduction band and gap states were observed when comparing the experimental results to a theoretical site-saturation model that considers electronic transitions between localized tungsten sites. The model could reproduce the optical response due to conduction band states. However, it underestimated the rate of change of the optical absorption coefficient with intercalation level for gap states. This discrepancy is discussed in the context of small-polaron optical absorption.

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