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Understanding the Bulk Heterojunction Structures

Still remains the most efficient device architecture for polymer solar cells up to now. [Pg.333]

In order to understand the remarkable improvement of device efficiency introduced by BHJ structures, the working mechanism of polymer solar cells has to be clarified. The working mechanism of organic thin-film solar cells can be broken down as follows  [Pg.333]

Each step can be evaluated by (the absorption efficiency), (the exciton diffusion efficiency), /ct (the charge transfer efficiency), and tj Q (the carrier collection efficiency), respectively. [Pg.333]

The external quantum efficiency of an organic solar cell equals [Pg.333]

Consequently, interpenetrating phase-separated D/A network composites, that is, bulk heterojunctions, appear to be ideal photovoltaic composites. The fundamental [Pg.333]


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