Synthesis and Mechanistic Studies of Organic Chromophores with Different Energy Levels for p-Type Dye-Sensitized Solar Cells
Journal article, 2010
A series of donor-pi-acceptor dyes with different electron-withdrawing groups were designed and synthesized for p-type dye-sensitized Solar cells. The modification of dye structures shows significant influence on the photophysical, electrochemical, and photovoltaic performance of the dyes. DSSCs based on these dyes show maximum 63% and minimum 6% of incident monochromatic photon-to-current conversion efficiencies. The two dyes with the highest (P1) and lowest (P3) efficiencies were Studied by femtosecond transient absorption spectroscopy, which shows a fast injection rate of more than (250 fs)(-1) for both dyes. Such fast injection corresponds to more than 90% injection efficiency. The photoinduced absorption Spectroscopy Study of sensitized NiO films in the presence of electrolyte showed poor regeneration of 113 due to all insufficient driving force. This, together with aggregation of the dye on the NiO film, explained the poor solar cell performance.
CURRENT CONVERSION EFFICIENCY
CHARGE-TRANSFER
NANOSTRUCTURED
DENSITY
FILMS
OPEN-CIRCUIT VOLTAGE
NIO
DYNAMICS
PHOTOCATHODE
ELECTRON-TRANSFER
SPECTROELECTROCHEMISTRY
Author
P. Qin
The Royal Institute of Technology (KTH)
Joanna Wiberg
Chalmers, Chemical and Biological Engineering, Physical Chemistry
E. A. Gibson
Uppsala Universitet
M. Linder
The Royal Institute of Technology (KTH)
L. Li
The Royal Institute of Technology (KTH)
T. Brinck
Uppsala Universitet
A. Hagfeldt
Dalian University of Technology
Bo Albinsson
Chalmers, Chemical and Biological Engineering, Physical Chemistry
L. C. Sun
Dalian University of Technology
The Royal Institute of Technology (KTH)
Journal of Physical Chemistry C
1932-7447 (ISSN) 1932-7455 (eISSN)
Vol. 114 10 4738-4748Subject Categories (SSIF 2011)
Physical Chemistry
DOI
10.1021/jp911091n