Chemistry: A European Journal 2014-10-20

Synthesis and characterization of donor-π-acceptor-based porphyrin sensitizers: potential application of dye-sensitized solar cells.

Mareedu Sreenivasu, Akira Suzuki, Mitsuhiro Adachi, Challuri Vijay Kumar, Bingi Srikanth, S Rajendar, Dasa Rambabu, Rangaraju Satish Kumar, P Mallesham, N Vijaya Bhaskar Rao, M Suresh Kumar, P Y Reddy

Index: Chemistry 20(43) , 14074-83, (2014)

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Abstract

New porphyrin sensitizers based on donor-π-acceptor (D-π-A) approach have been designed, synthesized, characterized by various spectroscopic techniques and their photovoltaic properties explored. N,N'-Diphenylamine acts as donor, the porphyrin is the π-spacer, and either carboxylic acid or cyanoacryclic acid acts as acceptor. All compounds were characterized by using (1)H NMR spectroscopy, ESI-MS, UV-visible emission spectroscopies as well as electrochemical methods. The presence of aromatic groups between porphyrin π-plane and acceptor group push the absorption of both Soret and Q-bands of porphyrin towards the red region. The electrochemical properties suggests that LUMO of these sensitizers above the TiO2 conduction band. Finally, the device was fabricated using liquid redox electrolyte (I(-)/I3(-)) and its efficiency was compared with that of a leading sensitizer.© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.