Oral presentation at JCS spring meeting-2014
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Transcript of Oral presentation at JCS spring meeting-2014
色素増感太陽電池への応用に向けてリンフタロシアニンの合成、特性評価および会合の研究
Synthesis, Characterization and Aggregation Studies of Phosphorous Phthalocyanine
Towards its Application in Dye Sensitized Solar Cells
Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu, Kitakyushu 808-0196, Japan
Nippon Steel Chemical Co. Ltd., 46-80 Nakabaru, Sakinohama, Tobata, Kitakyushu 804-8503, Japan
Gururaj M. Shivashimpi, Shyam S. Pandey, Hayat Azwar,
Naotaka Fujikawa, Yuhei Ogomi, Yoshihiro Yamaguchi and
Shuzi Hayase
Spectral Response in high efficiency DSSCs
Dye YD2-O-C8
Efficiency = 11.9 %
Ru-dye-N719
Efficiency = 11 %
Dye Perovskite
Efficiency = 15 %
R & D of Novel
Sensitizers
M. Gratzel , et al., J. Am. Chem. Soc. (2005) 127 16835 Ashwini Yella , et al., Science.
(2011), 334, 629
J. Burschka, et al., Nature. (2013), 499, 316
Development of NIR Dyes !
Potentiality of Phthalocyanine sensitizers
1. Macrocyclic pi-extended framework
2. Thermal, Chemical and photochemical stability
3. Sharp and Intense light absorption with High molar extinction
coefficient
4. Capability of sensitization of wide band gap semiconductors
5. Possibility to tailor the optical absorption window from visible to
NIR wavelength region
Yanagisawa, et al;
J. Porp. Phthal. 6 (2002) 217-224.
Efficiency = 0.61%
DSSCs Based on Phthalocyanine Dyes !
Efficiency = 3.52%
Cid, J.-J. et al;
Angew. Chem., Int. Ed. Engl., 46
(2007) 8358–8362.
Efficiency = 0.11%
Yanagisawa, et al;
J. Porp. Phthal. 6 (2002) 217-224.
Efficiency = 6.49%
Ragoussi. et al;
ChemPhysChem (2014) Early
Park, S. Hayase et al,;
ECS JSS, 2 (2012) Q6-Q11.
Efficiency = 0.5% (On SnO2)
Phthalocyanine based on Axial Ligation
Phosphorous Phthalocyanine
Axial Ligation by Phosphorous Phthalocyanine
Photovoltaic Performance
Design of Novel Phosphorous Phthalocyanine
Compound HOMO LUMO Band gap
TBC-A - 4.60 eV - 2.52 eV 2.08 eV
TBC-B - 6.00 eV - 3.72 eV 2.28 eV
Comp. 4 - 4.75 eV - 2.67 eV 2.08 eV
Target Phosphorous Phthalocyanine
HR-FAB MS: Observed 1554.3662 [M]+ for C64H57F24N7O9P (calcd 1554.3572)
Structure confirmed by 1H-NMR, FT-IR and 31P-NMR
Phosphorous 3,6,10,13,17,20,24,27-octatrifluorobutoxy-
triazatetrabenzcorrole
Synthesis of Phosphorous Phthalocyanine
Characterization of Phosphorous Phthalocyanine
Electronic Absorption Spectra Energy Band Diagram
Table 1. List of solvents used with their
Dielectric constants.
Solvent Dielectric constant
CCl4 2.24
THF 7.58
Pyridine 12.4
1-Pentanol 15.13
1-Propanol 20.4
Acetone 20.52
Ethanol 24.85
Methanol 32.7 Figure 2. Electronic absorption spectra of Dye 4
in various solvents.
Aggregation
Aggregation Studies
Solvent e Q-band Aggregate band % of
aggregation
CCl4 2.24 722 nm 679 nm 39.99%
THF 7.58 713 nm 670 nm 41.88%
Pyridine 12.4 714 nm 673 nm 46.51%
1-Pentanol 15.13 710 nm 673 nm 48.63%
1-Propanol 20.4 709 nm 673 nm 49.10%
Acetone 20.52 708 nm 670 nm 48.65%
Ethanol 24.85 709 nm 673 nm 52.39%
Methanol 32.7 714 nm 682 nm 57.25%
Optical absorption data and percentage of aggregation values in
various solvents.
Plot of aggregation vs dielectric constant.
Aggregation Studies
% Aggregation = Avibronic-band/AQ-band
Conclusions
Phosphorus-Phthalocyanine was found to be attached on TiO2 surface
without having special anchoring group.
Attachment takes place via axial ligation through Ti-O-P linkage
New Phosphorous Phthalocyanine was designed, synthesized and
characterized.
It is fairly soluble in common organic solvents and shows energetic
matching with TiO2 conduction band and Iodine based redox couple.
Aggregation behavior in various organic solvent was investigated and
shows linear dependence with the dielectric constant of the solvents.
Thank you very much for your
kind attention !