000184441 001__ 184441
000184441 005__ 20181203023017.0
000184441 0247_ $$2doi$$a10.1002/cphc.201200435
000184441 022__ $$a1439-4235
000184441 02470 $$2ISI$$a000307841900015
000184441 037__ $$aARTICLE
000184441 245__ $$aAvoiding Diffusion Limitations in Cobalt(III/II)-Tris(2,2'-Bipyridine)-Based Dye-Sensitized Solar Cells by Tuning the Mesoporous TiO2 Film Properties
000184441 260__ $$bWiley-Blackwell$$c2012$$aWeinheim
000184441 269__ $$a2012
000184441 300__ $$a6
000184441 336__ $$aJournal Articles
000184441 520__ $$aDye-sensitized solar cells based on electrolytes containing cobalt complexes as redox shuttles typically suffer a major limitation in terms of slow diffusion of those couples through the mesoporous TiO2 film. This results in a drop of the photocurrent density, particularly at high incident light intensities, reducing the overall cell performance. This work illustrates how tuning the four characteristic parameters of the mesoporous TiO2 layer, namely film thickness, particle size, pore size and porosity, by simply optimizing the TiCl4 post-treatment, completely eliminates diffusion problems of cobalt(III/II) tris(2,2'-bipyridine) and at the same time maximizes the short-circuit photocurrent density. As a result, a power conversion efficiency of 10.0?% at AM 1.5 G 100 mW?cm-2 was reached in conjunction with an organic sensitizer.
000184441 6531_ $$acobalt
000184441 6531_ $$adiffusion limitation
000184441 6531_ $$adye-sensitized solar cells
000184441 6531_ $$aredox couples
000184441 6531_ $$atitanium dioxide
000184441 700__ $$0244229$$g201637$$uEcole Polytech Fed Lausanne, Inst Chem Sci, CH-1015 Lausanne, Switzerland$$aTsao, Hoi Nok
000184441 700__ $$0240596$$g104809$$uEcole Polytech Fed Lausanne, Inst Chem Sci, CH-1015 Lausanne, Switzerland$$aComte, Pascal
000184441 700__ $$0244228$$g201491$$uEcole Polytech Fed Lausanne, Inst Chem Sci, CH-1015 Lausanne, Switzerland$$aYi, Chenyi
000184441 700__ $$aGraetzel, Michael$$uEcole Polytech Fed Lausanne, Inst Chem Sci, CH-1015 Lausanne, Switzerland$$g105292$$0240191
000184441 773__ $$j13$$tChemphyschem$$k12$$q2976-2981
000184441 909C0 $$xU10101$$0252060$$pLPI
000184441 909CO $$pSB$$particle$$ooai:infoscience.tind.io:184441
000184441 917Z8 $$x105528
000184441 937__ $$aEPFL-ARTICLE-184441
000184441 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000184441 980__ $$aARTICLE