The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 2012
Filed:
Feb. 13, 2007
Daibin Kuang, Lausanne, CH;
Peng Wang, Cambridge, GB;
Shaik Mohammad Zakeeruddin, Renens, CH;
Michaël Graetzel, St-Sulpice, CH;
Daibin Kuang, Lausanne, CH;
Peng Wang, Cambridge, GB;
Shaik Mohammad Zakeeruddin, Renens, CH;
Michaël Graetzel, St-Sulpice, CH;
Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, CH;
Abstract
The present invention relates to electrolytes comprising tetracyanoborate and an organic cation as components of electrolytes in electrochemical and/or optoelectronic devices, in particular solar cells. This ionic liquid has low viscosity and can be used as electrolyte in the absence of a solvent. Importantly, the ionic liquid remains stable in solar cells even after prolonged thermal stress at 80° C. for 1000 hours. Photovoltaic conversion efficiency remained stable and keeping more than 90% of the initial value.