New Tunable Phosphorus-Doped Conductor

  • Author: Nancy McGuire
  • Published: 15 May 2015
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Chemistry of Materials/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: New Tunable Phosphorus-Doped Conductor

Titanium dioxide, a well-characterized photocatalyst, can be transformed into a transparent conducting oxide (TCO) by incorporating cationic dopants with an oxidation state greater than that of titanium (Ti4+). This produces a blue shift in optical absorption and a dramatic reduction in resistivity. Phosphorus can be incorporated as a cationic (P5+) or an anionic (P3-) dopant, and it is much more abundant than other common dopants, including Nb or Ta.

TiO2 materials exhibit a higher refractive index, greater chemical stability, and a lower production cost compared with indium-based TCO materials.

Ivan Parki, University College, London, UK, and colleagues used atmospheric pressure chemical vapor deposition (APCVD) to produce the first example of TiO2 films doped with both P5+ and P3– species. The relative proportion depends on the synthesis conditions. Undoped TiO2 films showed superior photocatalytic activity to doped films containing primarily P3– because the phosphorus anion reduced photogenerated charge carrier lifetimes. Doped films with only P5+ species increased charge carrier concentrations by several orders of magnitude over undoped films.


Article Views: 3613

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH