Molecular adjustment of the electronic properties of nanoporous electrodes in dye-sensitized solar cells

被引:312
作者
Rühle, S
Greenshtein, M
Chen, SG
Merson, A
Pizem, H
Sukenik, CS
Cahen, D [1 ]
Zaban, A
机构
[1] Weizmann Inst Sci, Dept Mat & Interfaces, IL-76100 Rehovot, Israel
[2] Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel
[3] Tel Aviv Univ, Sch Elect Engn, IL-69978 Ramat Aviv, Israel
关键词
D O I
10.1021/jp0514123
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Molecular modification of dye-sensitized, mesoporous TiO2 electrodes changes their electronic properties. We show that the open-circuit voltage (V-oc) of dye-sensitized solar cells varies linearly with the dipole moment of coadsorbed phosphonic, benzoic, and dicarboxylic acid derivatives. A similar dependence is observed for the short-circuit current density (I-sc). Photovoltage spectroscopy measurements show a shift of the signal onset as a function of dipole moment. We explain the dipole dependence of the V-oc in terms of a TiO2 conduction band shift with respect to the redox potential of the electrolyte, which is partially followed by the energy level of the dye. The I-sc shift is explained by a dipole-dependent driving force for the electron current and a dipole-dependent recombination current.
引用
收藏
页码:18907 / 18913
页数:7
相关论文
共 33 条
[21]   Femtosecond electron-transfer dynamics at a sensitizing dye-semiconductor (TiO2) interface [J].
Rehm, JM ;
McLendon, GL ;
Nagasawa, Y ;
Yoshihara, K ;
Moser, J ;
Gratzel, M .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (23) :9577-9578
[22]   Staircase in the electron mobility of a ZnO quantum dot assembly due to shell filling [J].
Roest, AL ;
Kelly, JJ ;
Vanmaekelbergh, D ;
Meulenkamp, EA .
PHYSICAL REVIEW LETTERS, 2002, 89 (03) :368011-368014
[23]   Electron tunneling at the TiO2/substrate interface can determine dye-sensitized solar cell performance [J].
Rühle, S ;
Cahen, D .
JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (46) :17946-17951
[24]   Molecular modification of an ionic semiconductor-metal interface: ZnO/molecule/Au diodes [J].
Salomon, A ;
Berkovich, D ;
Cahen, D .
APPLIED PHYSICS LETTERS, 2003, 82 (07) :1051-1053
[25]  
Selzer Y, 2001, ADV MATER, V13, P508, DOI 10.1002/1521-4095(200104)13:7<508::AID-ADMA508>3.3.CO
[26]  
2-#
[27]   Molecular control over Au/GaAs diodes [J].
Vilan, A ;
Shanzer, A ;
Cahen, D .
NATURE, 2000, 404 (6774) :166-168
[28]   Molecule-metal polarization at rectifying GaAs interfaces [J].
Vilan, A ;
Ghabboun, J ;
Cahen, D .
JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (26) :6360-6376
[29]   Molecular adsorption-mediated control over the electrical characteristics of polycrystalline CdTe/CdS solar cells [J].
Visoly-Fisher, I ;
Sitt, A ;
Wahab, M ;
Cahen, D .
CHEMPHYSCHEM, 2005, 6 (02) :277-285
[30]   The effect of the preparation condition of TiO2 colloids on their surface structures [J].
Zaban, A ;
Aruna, ST ;
Tirosh, S ;
Gregg, BA ;
Mastai, Y .
JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (17) :4130-4133