US 7,508,009 B2
Electrochromic device based on nanocrystalline materials
Marten Edwards, Oppsala (Sweden); Anders Hagfeldt, Björklinge (Sweden); Gerrit Boschloo, Uppsala (Sweden); and Sten-Erik Lindqvist, Uppsala (Sweden)
Assigned to Ntera, Ltd., Radnor, Pa. (US)
Appl. No. 10/343,718
PCT Filed Aug. 02, 2001, PCT No. PCT/SE01/01696
§ 371(c)(1), (2), (4) Date Jun. 04, 2003,
PCT Pub. No. WO02/12954, PCT Pub. Date Feb. 14, 2002.
Prior Publication US 2005/0104136 A1, May 19, 2005
Int. Cl. H01L 33/00 (2006.01)
U.S. Cl. 257—103  [257/13] 12 Claims
OG exemplary drawing
 
1. An electrochromic device, comprising a first electrode, a second electrode and an electrolyte separating the electrodes,
wherein said first electrode comprises an electrically active structure which has an at least dual state visual appearance depending on the potential difference between the first and the second electrode;
wherein said second electrode comprises a nanostructured conducting or semiconducting film, which does not have a redox active species added to the surface; and
wherein said second electrode together with the electrolyte are arranged for supporting a capacitive charge compensation by charging of an interface between said second electrode and the electrolyte by an accumulation of a quantity of positive and negative charges at either side of said interface.