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. 2016 Jan 7;6:18756. doi: 10.1038/srep18756

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Characterization of dye molecules: (a) absorption and (b) emission spectra of B18, CPTD-R and BTD-R in CHCl₃ solution. (c) Cyclic voltammograms of B18, CPTD-R and BTD-R, obtained in in freshly distilled CHCl₃ using 0.5 M Tetrabutylammonium hexafluorophosphate (TBAPF₆) as supporting electrolyte in a three–electrode configuration. (d) Schematic of potential levels of B18, CPTD-R and BTD-R with HOMO and LUMO levels showing electron injection to CB of ZnO and dye regeneration by I⁻/I₃⁻ electrolyte.