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Effect of TiO2 nanoparticles on newly synthesized phenothiazine derivative-CPTA dye and its applications as dye sensitized solar cell.

Authors :
Chougala, Lakkanna S.
Kadadevarmath, Jagadish S.
Kamble, Atulkumar A.
Bayannavar, Praveen K.
Yatnatti, Mahantesh S.
Linganagoudar, Ravi K.
Nirupama, J.M.
Kamble, Ravindra R.
Qiao, Qiquan
Source :
Journal of Molecular Liquids. Oct2017, Vol. 244, p97-102. 6p.
Publication Year :
2017

Abstract

In this paper, effect of titanium dioxide (TiO 2 ) nanoparticles (NPs) on newly synthesized phenothiazine dye i.e., ( Z )-2-cyano-3-(10-heptyl-10 H -phenothiazin-7-yl) acrylic acid (CPTA dye) has been studied using spectroscopic techniques such as absorption, fluorescence and electrochemical. Absorption spectra of CPTA dye in the presence of TiO 2 appears broadened without any shift in the absorption peaks which suggests possible interactions between the CPTA dye and TiO 2 NPs and absence of complex formation. These inferences were validated by determining association constant ( k a ) according to Benesi–Hildebrand theory. In order to see the role of fluorescence quenching, S-V theory was invoked, it was observed that phenomenon of quenching follows dynamic or collisional process under both steady and transient states. Experimentally determined magnitude of bimolecular quenching rate parameter is equal to the order of maximum collisional quenching rate parameter. Role of energy transfer between CPTA dye and TiO 2 NPs has been discussed using Rehm-Weller theory. From this it reveals that electron transfer process is more pronounced under more polar solvent (Methanol) than less polar solvent (ethyl acetate). Electron transfer mechanism has been exploited in solar energy harvesting applications by fabricating solar cell sensitized by CPTA dye. From this, it was observed that the efficiency and fill factor of fabricated DSSC was 2.15% and 0.58 respectively under optimized conditions and solar harvesting property of newly synthesized phenothiazine derivative of CPTA dye is the first report. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
01677322
Volume :
244
Database :
Academic Search Index
Journal :
Journal of Molecular Liquids
Publication Type :
Academic Journal
Accession number :
125468231
Full Text :
https://doi.org/10.1016/j.molliq.2017.08.120