A Facile Synthesis of Granular ZnO Nanostructures for Dye-Sensitized Solar Cells

Figure 2

(a) Current density-voltage (J-V) characteristics of DSSCs with photoelectrodes of Z1, Z2, and Z3 grains. (b) Cyclic voltammograms (CVs) of the photoelectrodes in 0.5 M LiClO₄ dissolved in acetonitrile at a scan rate of 50 mV/s. (c) The exponential distribution of the density of states (DOS) of different ZnO nanograins was deduced by capacitive charging of electrons into the surface states versus applied potential and (d) the Bode plots from electrochemical impedance spectroscopy of DSSCs.

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