Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/101842
Title: A maskless synthesis of TiO2-nanofiber-based hierarchical structures for solid-state dye-sensitized solar cells with improved performance
Authors: Pramana, Stevin S.
Sabba, Dharani
Agarwala, Shweta
Mhaisalkar, Subodh
Keywords: DRNTU::Engineering::Materials::Nanostructured materials
Issue Date: 2014
Source: Sabba, D., Agarwala, S., Pramana, S. S., & Mhaisalkar, S. (2014). A maskless synthesis of TiO2-nanofiber-based hierarchical structures for solid-state dye-sensitized solar cells with improved performance. Nanoscale Research Letters, 9(1), 14.
Series/Report no.: Nanoscale research letters
Abstract: TiO2 hierarchical nanostructures with secondary growth have been successfully synthesized on electrospun nanofibers via surfactant-free hydrothermal route. The effect of hydrothermal reaction time on the secondary nanostructures has been studied. The synthesized nanostructures comprise electrospun nanofibers which are polycrystalline with anatase phase and have single crystalline, rutile TiO2 nanorod-like structures growing on them. These secondary nanostructures have a preferential growth direction [110]. UV–vis spectroscopy measurements point to better dye loading capability and incident photon to current conversion efficiency spectra show enhanced light harvesting of the synthesized hierarchical structures. Concomitantly, the dye molecules act as spacers between the conduction band electrons of TiO2 and holes in the hole transporting medium, i.e., spiro-OMeTAD and thus enhance open circuit voltage. The charge transport and recombination effects are characterized by electrochemical impedance spectroscopy measurements. As a result of improved light harvesting, dye loading, and reduced recombination losses, the hierarchical nanofibers yield 2.14% electrochemical conversion efficiency which is 50% higher than the efficiency obtained by plain nanofibers.
URI: https://hdl.handle.net/10356/101842
http://hdl.handle.net/10220/18798
ISSN: 1556-276X
DOI: 10.1186/1556-276X-9-14
Rights: © 2014 Sabba et al.; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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