Please use this identifier to cite or link to this item: https://doi.org/10.1039/c1ee02703d
Title: High performance dye-sensitized solar cells with record open circuit voltage using tin oxide nanoflowers developed by electrospinning
Authors: Kumar, E.N.
Jose, R.
Archana, P.S. 
Vijila, C.
Yusoff, M.M.
Ramakrishna, S. 
Issue Date: Jan-2012
Citation: Kumar, E.N., Jose, R., Archana, P.S., Vijila, C., Yusoff, M.M., Ramakrishna, S. (2012-01). High performance dye-sensitized solar cells with record open circuit voltage using tin oxide nanoflowers developed by electrospinning. Energy and Environmental Science 5 (1) : 5401-5407. ScholarBank@NUS Repository. https://doi.org/10.1039/c1ee02703d
Abstract: Flower shaped nanostructures of an architypical transparent conducting oxide, SnO2, have been synthesized by an electrospinning technique for the first time by precisely controlling the precursor concentration in a polymeric solution. The flowers were made up of nanofibrils of diameter ∼70-100 nm, which in turn consisted of linear arrays of single crystalline nanoparticles of size 20-30 nm. Mott-Schottkey analysis shows that flowers have an order of magnitude higher electron density compared with the fibers despite their chemical similarity. Dye-sensitized solar cells fabricated using the flowers showed a record open circuit voltage of ∼700 mV and have one of the highest photoconversion efficiencies so far achieved with SnO2 and the iodide/triiodide electrolyte. The photoaction spectra and impedance spectroscopic measurements show that the flowers are characterized by a higher electron lifetime, owing to their enhanced crystallinity, compared to the conventional fibrous structure. © 2011 The Royal Society of Chemistry.
Source Title: Energy and Environmental Science
URI: http://scholarbank.nus.edu.sg/handle/10635/85263
ISSN: 17545692
DOI: 10.1039/c1ee02703d
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