**8.4 Organic solar cells**

This is a new solar energy electric conversion technology in which solar cell is currently being developed from various organic matters (dyes). They are sort of thin films discussed above. The crystallized silicon solar cells have being a standard technology in solar conversion devices for over fifty years. However they are still expensive, and relatively inefficient (they have achieved only 50% efficiency so far). Right now, various types of organic solar cells from dye materials are being studied and may soon replace the silicon solar cells, because they (organic solar cells) will be fabricated with greater efficiency, low cost processes, and they will be more versatile than silicon solar cells. Further still, they have added advantages of being thinner, lighter and more colourful than silicon solar cells.
