Promising ZnO-based DSSC performance using HMP molecular dyes of high extinction coefficients

Abstract

Employing newly synthesized di-substituted tri-phenyl amine (HMP-9) and carbazole (HMP-11) dyes (with limited acidic carboxyl anchor groups), a power conversion efficiency as high as 7.03% in ZnO nanocrystallite (NC)-based dye-sensitized solar cells (DSSCs) is achieved. The specific molecular designs of HMP-09 and HMP-11 consisting of with and without hexyloxy spacer groups, and added tri-phenyl amine or 9-phenyl-9H-carbazole donor groups, respectively, attached on the ancillary ligands are advantageous, evidenced from electrochemical impedance spectroscopy measurements, for ZnO NC-based DSSCs.

Visible light absorption and photo-sensitizing properties of spinach leaves and beetroot extracted natural dyes

“…As compared to TiO 2 , ZnO retains higher electron mobility which should enable it for faster transport of photo-excited electrons. For DSSC application, the performance of ZnO based photo-anodes sensitized with commercial/synthetic dyes are reported elsewhere [15][16][17].…”

Morphology induced light scattering by zinc oxide polydisperse particles: Promising for dye sensitized solar cell application

“…For ZnO based solar cells, so far the best achieved photo-conversion efficiency is 7%-8%. 24,30,34,36,37 However, such high efficiencies were attained mostly by the aggregated structured/doped/chemically modified electrode or by introducing compact blocking layer in the photo-anode (as summarised in Table II). The production of such electrodes in bulk scale requires costly and complex processes.…”

“…24,28,36,[38][39][40][41][42] For dye sensitized solar cell application, zinc oxide based photo-anode with various dyes and electrolytes has been reported. [29][30][31][32][33][34][35] However, the cells having significant solar to electric conversion efficiency (!2%) and prepared using N3/N719 dyes and I À /I 3 À electrolyte are considered for the present comparison. As envisaged from the table the polydisperse/ aggregated ZnO based photo-anodes are capable to yield the efficient DSSCs.…”

Selenium nanostructures: microbial synthesis and applications

“…[88][89][90] Due to the unusual properties Se can be used in solar cells. Selenium generates electric current proportional to the amount of light falling on its surface due to this inexpensive solar cell can be produced by Se NPs.…”