Effect of ZnO Nanoparticle
Properties on Dye-Sensitized
Solar Cell Performance
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Abstract
We have investigated the effect of ZnO nanoparticle properties
on the dye-sensitized solar cell performance. Nanoparticles with different
sizes and optical properties were considered. We found that there
is a complex relationship between native defects, dye adsorption,
charge transport and solar cell performance. The presence of a high
concentration of nonradiative defects was found to be detrimental
to photovoltaic performance, whereas for radiative defects, samples
displaying orange-red defect emission exhibited better performance
compared to samples with green defect emission (when the samples had
similar emission intensities). Detailed discussion of the nanoparticle
properties and their relationship with dye adsorption, electron injection,
electron lifetime, electron transport time, and solar cell performance
is given