Synthesis of novel cyanine-fullerene dyads for photovoltaic devices

Two novel cyanine-fullerene dyads have been synthesized by means of the Prato reaction from the corresponding cyanine-aldehyde, N-methylglycine and C<sup>60</sup>. As well as a thorough characterization using MS-TOF, <sup>1</sup>H-NMR, <sup>13</sup>C-NMR and elemental analysis, the optical and electrochemical properties of these two dyads were investigated. The fluorescence of the cyanine-fullerene dyads was quenched efficiently as compared to the pristine cyanine, which we have attributed to photo-induced electron transfer from the cyanine to C<sub>60</sub>. The redox potentials obtained by cyclic voltammetry provide evidence that this electron transfer is energetically favorable. Single and double layer photovoltaic devices were fabricated to evaluate the photovoltaic properties of the dyad. The energetic conversion efficiency of the double layer device exceeds 0.1% under 3.1 mW cm<sup>-2</sup> white light irradiation. The results show that cyanine-fullerene dyads are promising materials for photovoltaic devices


Published in:
Journal of Materials Chemistry, 15, 9, 979
Year:
2005
Publisher:
R. Soc. Chem
Keywords:
Note:
East China Univ. of Sci. & Technol., Shanghai, China
Copyright 2006, IEE
8786108
0959-9428
novel cyanine-fullerene dyads
single layer photovoltaic device
double layer photovoltaic device
Prato reaction
cyanine-aldehyde
N-methylglycine
MS-TOF
1H-NMR
13C-NMR
elemental analysis
electrochemistry
fluorescence quenching
pristine cyanine
photo-induced electron transfer
redox potentials
cyclic voltammetry
energetic conversion efficiency
white light irradiation
C60
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Laboratories:




 Record created 2007-04-03, last modified 2018-12-03


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