Polymer photovoltaic optimizations from exciton level

Future polymeric or 'Cyplastic' solar cells are very attractive for solar energy conversions where large area, low cost, lightweight, and flexible shape are desired. In this brief review, fundamental mechanisms of inorganic and organic/polymeric photovoltaic materials will be briefly compared at exciton levels. This study shows that the frontier orbital couplings at atomic and molecular levels are crucial for the mechanisms of photo carrier generation and transport, either exciton or band models. Optimization approaches of polymer based solar cells are also addressed.