Eleven natural dyes were extracted from three trees and
used as photosensitizers for DSSCs. These dyes were
extracted from the leaves, flowers, barks, and roots of the
three trees. TiO2 was used as a semiconductor. DSSCs
sensitized with plant leaves showed higher efficiency than
those sensitized with other parts of the trees due to the
presence of chlorophyll a as the absorption spectra showed.
The highest conversion efficiency was 0.40% for the DSSC
sensitized with zizyphus leaves. DSSCs sensitized with roots
and barks exhibited the lowest response