Organic solar cells silicon-based

Whether organic solar cells will be commercially employed in the future will be decided by economic aspects. It is certain, however, that their fabrication is simpler and cheaper than that of silicon-based solar cells. Furthermore, they have the advantage that they can be produced on flexible and light substrates. In addition, solar cells based on polymer systems can be fabricated using printing technology. 

The original silicon-based p- l junction solar cells have been replaced by recent organic solar cells to reduce the cost of production. 

Furthermore, these data strongly suggest that the positive temperature dependence of Isc, FF, and r) may be characteristic for solar cells based on organic semiconductors that show a temperature-activated behavior for charge transport, resulting in higher mobility/conductivity at higher temperatures (as also observed, for example, for some types of amorphous silicon solar cells [162]). 

Abstract Photovoltaic cells have been dominated so far by solid state p-n junction devices made from silicon or gallium arsenide wavers or thin film embodiments based on amorphous silicon, CdTe and copper indium gallium diselenide (CIGS) profiting from the experience and material availability of the semiconductor industry. Recently there has been a surge of interest for devices that are based on nanoscale inorganic or organic semiconductors commonly referred to as bulk junctions due to their interconnected three-dimensional structure. The present chapter describes the state of the art of the academic and industrial development of nanostructured solar cells, with emphasis in the development of the dye-sensitized nanocristalline solar cell. 

With the development of organic semicondnctors which support electron or hole transport (in analogy of p- and n-type inorganic semiconductors) bilayer type p-n heterojunction devices have been constructed. In the case when organic p- and n-type materials are deposited consecutively in two layers we get lateral heterojunction devices which mimic classical p-n junction junction solar cells based on silicon. The first such cell was designed by Tang and pnb-lished in 1986 (Fignre 3)." Copper phthalocyanine was utilized as electron donor (p-type) material, whereas pery-lene derivative was nsed as electron acceptor connterpart (n-type material). 

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