uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Synthesis of Highly Effective Vanadium Nitride (VN) Peas as a Counter Electrode Catalyst in Dye-Sensitized Solar Cells
Show others and affiliations
2014 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 118, no 24, 12625-12631 p.Article in journal (Refereed) Published
Abstract [en]

Vanadium nitride (VN) peas and cubes were synthesized by regulating the molar ratio of the starting materials (urea/VOCl3) via the urea-metal chloride route. The as-prepared VN compounds were subsequently introduced into dye-sensitized solar cells (DSCs) as counter electrode (CE) catalysts for the regeneration of novel organic thiolate/disulfide (T-/T-2) and traditional iodide/triiodide (I-/I-3(-))redox couples. The cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel polarization curve results proved that the catalytic activity of the prepared VN was significantly affected by particle shape and particle size. The VN peas showed the highest catalytic activity, followed by the small VN cubes and large VN cubes. The I-/I-3(-)-electrolyte-based DSCs yielded a high power conversion efficiency (PCE) of 7.29%. The Pt-free VN CE catalysts are more suitable for the new organic redox couples of T-/T-2. The DSCs based on VN peas CE showed a PCE of 5.57%, an enhancement of 40.7% relative to the Pt-CE-based DSCs (3.96%).

Place, publisher, year, edition, pages
2014. Vol. 118, no 24, 12625-12631 p.
National Category
Physical Chemistry
URN: urn:nbn:se:uu:diva-229292DOI: 10.1021/jp501797eISI: 000337783900006OAI: oai:DiVA.org:uu-229292DiVA: diva2:736394
Available from: 2014-08-06 Created: 2014-08-05 Last updated: 2014-08-06Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Hagfeldt, Anders
By organisation
Physical Chemistry
In the same journal
The Journal of Physical Chemistry C
Physical Chemistry

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 409 hits
ReferencesLink to record
Permanent link

Direct link