Synthesis, Characterization, Optical, Electrochemical and Current-Voltage Characteristics of Coumarin Dyes
- 132 Downloads
A series of coumarin dyes having common acceptor and pi spacer with different donors were synthesized and characterized by spectroscopic techniques. The TiO2 nanoparticle has been synthesized by sol-gel method and characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. Photophysical and electrochemical properties have been investigated. The band gap, molar absorption coefficient and energies of frontier molecular orbitals (FMO) have been calculated. The results showed that an electron releasing group helps in tuning the band gap. The geometry optimization and energies of FMO were obtained by density functional theory calculations. The calculated global chemical parameters help in understanding the intrinsic donor-acceptor properties of the synthesized dye molecules. The result of current-voltage characteristics showed good photocurrent response under illumination condition.
KeywordsCoumarin Band gap I-V characteristics TiO2
Authors are thankful to UGC-SWRO and Department of Collegiate Education-Bangalore for selecting under UGC-FIP scheme. The authors are also thankful to DST (SERB), New Delhi, UGC New Delhi, for providing the instrumental facility.
- 4.Furniss BS, Hannaford AJ, Smith PWG, Tatchell AR (1989) Vogel's textbook of practical organic chemistry. Wiley, New YorkGoogle Scholar
- 8.Polizzotti A, Berke JS, Falsgraf E, Johal M (2012) In: Fthenakis V (ed) Third generation photovoltaics. InTech, Croatia, p 111Google Scholar
- 12.Yathisha RO, Arthoba Nayaka Y, Manjunatha P, Purushothama HT, Vinay MM, Basavarjappa KV (2019) Study on the effect of Zn2+ doping on optical and electrical properties of CuO nanoparticles. Physica E: Low-dimensional Systems and Nanostructures 108:257–268. https://doi.org/10.1016/j.physe.2018.12.021 CrossRefGoogle Scholar
- 17.Agrwal S, Pastore M, Marott G, Reddy MA, Chandrashekarm M, Angelis FD (2013) Optical properties and aggregation of phenothiazine-based dye-sensitizers for solar cells applications a combined experimental and computational investigation. J Phys Chem C 117(19):9613–9622. https://doi.org/10.1021/jp4026305 CrossRefGoogle Scholar