000109916 001__ 109916
000109916 005__ 20190117191559.0
000109916 02470 $$2DAR$$a10685
000109916 02470 $$2ISI$$a000245954900061
000109916 0247_ $$2doi$$a10.1021/jp067458t
000109916 037__ $$aARTICLE
000109916 245__ $$aDye Dependent Regeneration Dynamics in Dye Sensitized Nanocrystalline Solar Cells: Evidence for the Formation of a Ruthenium Bipyridyl Cation/Iodide Intermediate
000109916 269__ $$a2007
000109916 260__ $$c2007
000109916 336__ $$aJournal Articles
000109916 520__ $$aWe report a transient absorption study of the kinetics of re-reduction of ruthenium bipyridyl dye cations adsorbed to nanocrystalline TiO2 films by iodide ions, employing a series of RuII(dcbpy)2X dyes, where dcpby ) 4,4′-dicarboxy-2,2′-bipyridyl and X ) (NCS)2, (CN)2, DTC (diethyldithiocarbamate), and Cl2. The data indicate that this re-reduction (or ‘regeneration’) reaction proceeds via a transient (dye+-iodide) intermediate complex formed by reaction of photogenerated dye cations with one iodide ion. The subsequent reaction of this complex with a second iodide ion, forming I2-, is shown to be the kinetically and thermodynamically limiting step in the overall regeneration reaction. The implications of this reaction scheme for the function of dye sensitized photoelectrochemical cells are discussed, considering in particular the high photovoltaic efficiencies obtained for such devices employing such ruthenium bipyridyl senstiser dyes in combination with iodide/tri-iodide based redox electrolytes.
000109916 700__ $$aClifford, John N.
000109916 700__ $$aPalomares, Emilio
000109916 700__ $$0240422$$aNazeeruddin, Md. K.$$g105958
000109916 700__ $$0240191$$aGraetzel, M.$$g105292
000109916 700__ $$aDurrant, James R.
000109916 773__ $$j111$$k17$$q6561-6567$$tJournal of Physical Chemistry C
000109916 909C0 $$0252060$$pLPI$$xU10101
000109916 909CO $$ooai:infoscience.tind.io:109916$$pSB$$particle
000109916 937__ $$aLPI-ARTICLE-2007-030
000109916 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000109916 980__ $$aARTICLE