Chlorophyll can be used as a dye in the dye synthesized solar cells DSCC. Please for more details please follow the paper in the linkArticle Dye-sensitized solar cell using natural dyes extracted from ...
and the full length paper: Article A High Efficiency Chlorophyll Sensitized Solar Cell with Qua...
As Hassan et al. remark, the use of organically derived dyes in DSSC is attractive from the viewpoint of the environment and cost. However, it is not easy to use the dyes in DSSC to generate electricity with an efficiency even close to that of silicon and other modern thin film technologies. The absorption spectrum of the dye is also not what one would choose for a PV system to operate in sunlight. In my opinion, the conversion of sunlight into energetic molecules on the one hand, and into electricity on the other, requires two different approaches. With substances like gallium arsenide we are close to the quantum mechanical limit with the solar spectrum for converting energy into electricity and silicon is not far behind. For some reason nature has chosen not to use the green part of the solar spectrum (which is why chlorophyll appears green) and instead uses a dual chlorophyll system to achieve the necessary electron energy to reduce water molecules, which are then ultimately used to energise ATP molecules as fuel for the biological system.
While the use of chlorophyll is very attractive from certain standpoints, it is not optimised for electricity generation so after the initial successes in making lovely green solar cells, I am not confident that practical and efficient (compared with silicon) cells will ever be achieved.