000209489 001__ 209489
000209489 005__ 20190117191543.0
000209489 022__ $$a1932-7447
000209489 0247_ $$2doi$$a10.1021/jp072641n
000209489 037__ $$aARTICLE
000209489 245__ $$aModification of Nanostructured TiO2 Electrodes by Electrochemical Al3+ Insertion: Effects on Dye-Sensitized Solar Cell Performance
000209489 269__ $$a2007
000209489 260__ $$c2007
000209489 336__ $$aJournal Articles
000209489 520__ $$aNanostructured TiO2 films were modified by insertion with Al ions using an electrochem. process. After heat treatment these films were suitable as electrodes in dye-sensitized solar cells. By a catechol adsorption test and with photoelectron spectroscopy , the d. of Ti atoms at the metal oxide/electrolyte interface decreased due to Al modification. There is not a complete coverage of Al oxide onto the TiO2 - the results suggest either the formation of a mixed Al-Ti oxide surface layer or formation of a partial Al oxide coating. No new phase was detected. In solar cells with Al-modified TiO2 electrodes electron lifetimes and electron transport times increased. At high concns. of inserted Al ions, the quantum efficiency for electron injection decreased. Results are discussed according to a multiple trapping model which can explain slower kinetics by the creation of addnl. traps during Al insertion, and a surface layer model which explains the reduced recombination rate as well as the reduced injection efficiency by the formation of a blocking layer.
000209489 6531_ $$ananostructured titanium oxide electrode electrochem aluminum insertion solar cell
000209489 700__ $$aAlarcon, Hugo
000209489 700__ $$aHedlund, Maria
000209489 700__ $$aJohansson, Erik M. J.
000209489 700__ $$aRensmo, Hkan
000209489 700__ $$0248439$$aHagfeldt, Anders$$g164385
000209489 700__ $$aBoschloo, Gerrit
000209489 773__ $$j111$$q13267-13274$$tJournal of Physical Chemistry C
000209489 909C0 $$0252532$$pLSPM$$xU12908
000209489 909CO $$ooai:infoscience.tind.io:209489$$pSB$$particle
000209489 937__ $$aEPFL-ARTICLE-209489
000209489 973__ $$aOTHER$$rREVIEWED$$sPUBLISHED
000209489 980__ $$aARTICLE