期刊论文

Wood, Christopher J.

Yang, XC (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, DUT KTH Joint Res Ctr Mol Devices, Dalian 116024, Liaoning, Peoples R China.

Yang, Xichuan,Gibson, Elizabeth A.,Cheng, Ming,Clark, Charlotte A.,Horvath, Raphael,Clark, Ian P.,Hamilton, Michelle L.,Towrie, Michael,George, Michael W.,Sun, Licheng

2014-07-31

JOURNAL OF PHYSICAL CHEMISTRY C

SCIE、EI、Scopus

J

118

30,SI

16536-16546

1932-7447

A pair of new donor-pi-acceptor dyes that absorb toward the red region of the visible spectrum (CAD 1 and CAD 2) utilizing indolium cationic acceptor units have been synthesized for use in p-type dye-sensitized solar cells (p-DSC). Their optical and electrochemical properties were determined experimentally, including application of ultrafast transient absorption and time-resolved infrared spectroscopies. Our results are supported by computational modeling. NiO-based p-DSCs with CAD 1 and CAD 2 gave short-circuit photocurrent densities of 3.6 and 3.3 mA cm(-2), respectively, which are substantially higher than that of any previous red-absorbing p-DSC. These results are a step toward tandem dye-sensitized solar cells that absorb higher-energy photons at the TiO2 anode and lower-energy photons at the NiO cathode. Routes to further improve the efficiency of NiO DSCS are also discussed.