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Heo, Jin Hyuck,Im, Sang Hyuk,Kim, Hi-jung,Boix, Pablo P.,Lee, Suk Joong,Seok, Sang Il,Mora-Seró,, Ivax301,n,Bisquert, Juan American Chemical Society 2012 JOURNAL OF PHYSICAL CHEMISTRY C - Vol.116 No.39
<P>The Sb<SUB>2</SUB>S<SUB>3</SUB>-sensitized photoelectrochemical cells (Sb<SUB>2</SUB>S<SUB>3</SUB>–SPECs) in cobalt electrolyte were fabricated by depositing Sb<SUB>2</SUB>S<SUB>3</SUB> on the macroporous TiO<SUB>2</SUB> nanorods electrodes and consecutively spin-coating P3HT (Poly-3-hexylthiophene) interlayer to relieve the mass transport problem at vicinity of Sb<SUB>2</SUB>S<SUB>3</SUB> and cobalt redox couples and reduce the backward recombination. Through the introduction of P3HT interlayer, we could greatly enhance the power conversion efficiency of Sb<SUB>2</SUB>S<SUB>3</SUB>–SPEC to 4.2% at 1 sun illumination, whereas the Sb<SUB>2</SUB>S<SUB>3</SUB>–SPEC without P3HT interlayer exhibits 3.2% of device efficiency. The electrochemical impedance analysis let us know that the improved device performance was mainly attributed to the reduced backward recombination building up the higher open circuit voltage.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpccck/2012/jpccck.2012.116.issue-39/jp305150s/production/images/medium/jp-2012-05150s_0004.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp305150s'>ACS Electronic Supporting Info</A></P>