On the fundamental role of oxygen for the photochromic effect of WO3

Bechinger, Clemens; Oefinger, Gunther; Herminghaus, Stephan; Leiderer, Paul

On the fundamental role of oxygen for the photochromic effect of WO3

Dateien

135_japplphys_1993.pdfGröße: 949.95 KBDownloads: 521

Datum

1993

Autor:innen

Bechinger, Clemens

Oefinger, Gunther

Herminghaus, Stephan

Leiderer, Paul

Publikationstyp

Zeitschriftenartikel

unikn.publication.listelement.citation.prefix.version.undefined

Journal of Applied Physics. 1993, 74(7), pp. 4527-4533. Available under: doi: 10.1063/1.354370

Zusammenfassung

The photochromic effect of thin amorphous W03 films, i.e., the coloration upon exposing the sample to ultraviolet light, has been investigated by means of optically excited surface plasmons. Due to the high sensitivity of this technique, it was possible to investigate the dynamics of this effect on a scale as short as seconds. Our results demonstrate the dominant role of oxygen during the coloration and bleaching processes. We found clear evidence of an oxygen exchange between the sample and the ambient atmosphere during the photochromic process, which is at variance with the widely accepted double charge injection model. The coloration rate shows the same wavelength dependence as that of the creation rate of electron-hole pairs formed by optical excitation. The results can be explained by the light-induced decomposition of the incorporated water.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

BECHINGER, Clemens, Gunther OEFINGER, Stephan HERMINGHAUS, Paul LEIDERER, 1993. On the fundamental role of oxygen for the photochromic effect of WO3. In: Journal of Applied Physics. 1993, 74(7), pp. 4527-4533. Available under: doi: 10.1063/1.354370

BibTex

@article{Bechinger1993funda-9218,
  year={1993},
  doi={10.1063/1.354370},
  title={On the fundamental role of oxygen for the photochromic effect of WO3},
  number={7},
  volume={74},
  journal={Journal of Applied Physics},
  pages={4527--4533},
  author={Bechinger, Clemens and Oefinger, Gunther and Herminghaus, Stephan and Leiderer, Paul}
}

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