Exciton Splitting (IMAGE)

Stanford University

Exciton Splitting

Caption

Stanford scientists may have resolved a debate over how organic solar cells turn sunlight into electricity. The question: What causes electron-hole pairs (excitons) to split apart? The likely answer: a gradient at the solar cell interface between disordered polymers and ordered buckyballs splits the exciton, allowing the electron (purple) to escape and produce an electric current.

Credit

Koen Vandewal, Stanford University

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