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|Title:||High performance dye-sensitized solar cells with record open circuit voltage using tin oxide nanoflowers developed by electrospinning|
|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|
|Appears in Collections:||Staff Publications|
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