Functionalized Alkynylplatinum(II) Polypyridyl Complexes for Use as Sensitizers in Dye-Sensitized Solar Cells

被引：63

作者：

Kwok, Eric Chi-Ho ^{[1
,2
]}

Chan, Mei-Yee ^{[1
,2
]}

Wong, Keith Man-Chung ^{[1
,2
]}

Lam, Wai Han ^{[1
,2
]}

Yam, Vivian Wing-Wah ^{[1
,2
]}

机构：

[1] Univ Grants Comm Hong Kong, Dept Chem, Inst Mol Funct Mat, Areas Excellence Scheme, Hong Kong, Hong Kong, Peoples R China

[2] Univ Hong Kong, HKU CAS Joint Lab New Mat, Hong Kong, Hong Kong, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2010年 / 16卷 / 40期

关键词：

density functional calculations; dyes/pigments; energy conversion; platinum; sensitizers; PLATINUM(II) TERPYRIDYL COMPLEXES; NANOCRYSTALLINE TITANIUM-DIOXIDE; MOLECULAR-ORBITAL METHODS; AUGMENTED BASIS-SETS; HYDROGEN-PRODUCTION; PHOTOPHYSICAL PROPERTIES; POLARIZATION FUNCTIONS; EXCITATION-ENERGIES; ELECTRON INJECTION; CHARGE SEPARATION;

D O I：

10.1002/chem.201001424

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A series of platinum(II) alkynyl-based sensitizers has been synthesized and found to show light-to-electricity conversion properties. These dyes were developed as sensitizers for the application in nanocrystalline TiO2 dye-sensitized solar cells (DSSCs). Their photophysical and electrochemical properties were studied. The excited-state property was probed using nanosecond transient absorption spectroscopy, which showed the formation of a charge-separated state that arises from the intramolecular photoinduced charge transfer from the platinum(II) alkynylbithienylbenzothiadiazole moiety (donor) to the polypyridyl ligand (acceptor). A lifetime of 3.4 mu s was observed for the charge-separated state. A dye-sensitized solar cell based on one of the complexes showed a short-circuit photocurrent of 7.12 mA cm(-2), an open circuit voltage of 780 mV, and a fill factor of 0.65, thus giving an overall power conversion efficiency of 3.6%.

引用

页码：12244 / 12254

页数：11

共 85 条

[1] ENERGY-ADJUSTED ABINITIO PSEUDOPOTENTIALS FOR THE 2ND AND 3RD ROW TRANSITION-ELEMENTS [J].