Premium
Functionalized Alkynylplatinum(II) Polypyridyl Complexes for Use as Sensitizers in Dye‐Sensitized Solar Cells
Author(s) -
Kwok Eric ChiHo,
Chan MeiYee,
Wong Keith ManChung,
Lam Wai Han,
Yam Vivian WingWah
Publication year - 2010
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201001424
Subject(s) - dye sensitized solar cell , photochemistry , photocurrent , ultrafast laser spectroscopy , moiety , open circuit voltage , energy conversion efficiency , acceptor , excited state , solar cell , nanocrystalline material , intramolecular force , platinum , chemistry , materials science , spectroscopy , optoelectronics , electrolyte , nanotechnology , electrode , stereochemistry , voltage , organic chemistry , catalysis , physics , quantum mechanics , nuclear physics , condensed matter physics
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 TiO 2 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 μs 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 %.