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Electron transport and recombination in polycrystalline nanowire dye-sensitized solar cells
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Cross sectional and (b) plane view scanning electron microscopy images of a typical nanowire film. Scale bars in (a) and (b) are . (c) HRTEM of a nanowire. In (c), the scale bar is .

Image of FIG. 2.
FIG. 2.

Current-voltage characteristic of a nanowire DSSC under AM1.5 illumination. The inset shows the incident photon-to-current conversion efficiency.

Image of FIG. 3.
FIG. 3.

(a) Scaled photocurrent decay response of a nanowire DSSC at various laser intensities (100% laser ). The lines are the best fit to the data with biexponential decay. The inset shows the photocurrent response to a small square-wave modulation (6%) in laser intensity. (b) A typical IMPS response of a nanowire DSSC.

Image of FIG. 4.
FIG. 4.

(a) Recombination (▵, ◇) and (b) transport (엯, ●, ◻, ∎) time constants for nanowire DSSCs as a function of short circuit current (light intensity). In (b), open (엯, ◻) and filled symbols (●, ∎) represent transport times extracted from IMPS and photocurrent decay, respectively. Data for two cells (엯, ●) and (◻, ∎) are shown to illustrate reproducibility. Similarly, recombination time constant data are shown for two different cells (◇, ▵) in (a).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electron transport and recombination in polycrystalline TiO2 nanowire dye-sensitized solar cells